Positive voltage regulators
Features
■■■■■
Output current to 1.5 A
Output voltages of 5; 6; 8; 8.5; 9; 12; 15; 18; 24 V
Thermal overload protectionShort circuit protection
Output transition SOA protection
TO-220TO-220FPDescription
The L78xx series of three-terminal positive regulators is available in TO-220, TO-220FP, TO-3, D2PAK and DPAK packages and several fixed output voltages, making it useful in a wide range of applications. These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation. Each type employs internal current limiting, thermal shut-down and safe area
protection, making it essentially indestructible. If adequate heat sinking is provided, they can
deliver over 1 A output current. Although designed primarily as fixed voltage regulators, these
devices can be used with external components to obtain adjustable voltage and currents.
TO-3DPAKD²PAK
Table 1.Device summary
Part numbers
L7805L7805CL7806CL7808CL7885C
L7809CL7812CL7815CL7818CL7824C
March 2008Rev 191/56
www.st.com
56ContentsL78xx - L78xxC
Contents
123456789
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
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L78xx - L78xxCList of figures
List of figures
Figure 1.Figure 2.Figure 3.Figure 4.Figure 5.Figure 6.Figure 7.Figure 8.Figure 9.Figure 10.Figure 11.Figure 12.Figure 13.Figure 14.Figure 15.Figure 16.Figure 17.Figure 18.Figure 19.Figure 20.Figure 21.Figure 22.Figure 23.Figure 24.Figure 25.Figure 26.Figure 27.Figure 28.Figure 29.Figure 30.Figure 31.Figure 32.Figure 33.Figure 34.Figure 35.Figure 36.Figure 37.Figure 38.Figure 39.Figure 40.Figure 41.Figure 42.Figure 43.Figure 44.Figure 45.Figure 46.Figure 47.
Block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Schematic diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7DC parameter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Load regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Ripple rejection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Dropout voltage vs junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Peak output current vs input/output differential voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Supply voltage rejection vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Output voltage vs junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Output impedance vs frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Quiescent current vs junction temp.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Load transient response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Line transient response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Quiescent current vs input voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Fixed output regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Current regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Circuit for increasing output voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Adjustable output regulator (7 to 30 V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310.5 to 10 V regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32High current voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32High output current with short circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Tracking voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Split power supply (± 15 V - 1 A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Negative output voltage circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Switching regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34High input voltage circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35High output voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35High input and output voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Reducing power dissipation with dropping resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Remote shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Power AM modulator (unity voltage gain, IO ≤ 0.5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Adjustable output voltage with temperature compensation . . . . . . . . . . . . . . . . . . . . . . . . 37Light controllers (VOmin = VXX + VBE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Protection against input short-circuit with high capacitance loads . . . . . . . . . . . . . . . . . . . 38Drawing dimension TO-220 (type SMIC-subcon.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Drawing dimension TO-220 (type STD-ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Drawing dimension TO-220FP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Drawing dimension TO-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Drawing dimension DPAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Drawing dimension tape and reel for DPAK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48Drawing dimension D²PAK (type STD-ST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Drawing dimension D²PAK (type WOOSEOK-Subcon.). . . . . . . . . . . . . . . . . . . . . . . . . . . 50D²PAK footprint recommended data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Drawing dimension tape and reel for D²PAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
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List of tablesL78xx - L78xxC
List of tables
Table 1.Table 2.Table 3.Table 4.Table 5.Table 6.Table 7.Table 8.Table 9.Table 10.Table 11.Table 12.Table 13.Table 14.Table 15.Table 16.Table 17.Table 18.Table 19.Table 20.Table 21.Table 22.Table 23.Table 24.Table 25.Table 26.Table 27.Table 28.Table 29.Table 30.Table 31.Table 32.Table 33.
Device summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Absolute maximum ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Electrical characteristics of L7805 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Electrical characteristics of L7806 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Electrical characteristics of L7808 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Electrical characteristics of L7812 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Electrical characteristics of L7815 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Electrical characteristics of L7818 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Electrical characteristics of L7820 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Electrical characteristics of L7824 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Electrical characteristics of L7805C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Electrical characteristics of L7852C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Electrical characteristics of L7806C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Electrical characteristics of L7808C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Electrical characteristics of L7885C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Electrical characteristics of L7809C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Electrical characteristics of L7810C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Electrical characteristics of L7812C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Electrical characteristics of L7815C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Electrical characteristics of L7818C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Electrical characteristics of L7820C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Electrical characteristics of L7824C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28TO-220 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42TO-220FP mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44TO-3 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45DPAK mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Tape and reel DPAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48D²PAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51D²PAK footprint data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Tape and reel D²PAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4/56
L78xx - L78xxCDiagram
1 Diagram
Figure 1. Block diagram5/56
Pin configurationL78xx - L78xxC
2
Figure 2. Pin configuration
Pin connections (top view)TO-220TO-220FPD2PAK (Any Type)DPAKTO-3
Figure 3. Schematic diagram6/56
L78xx - L78xxCMaximum ratings
3 Maximum ratings
Table 2.
SymbolVIIOPDTSTGTOP
DC input voltageOutput currentPower dissipation
Storage temperature range
Operating junction temperature range
for L7800for L7800C
Absolute maximum ratings
Parameter
for VO= 5 to 18 Vfor VO= 20, 24 V
Value3540
Internally limitedInternally limited-65 to 150-55 to 1500 to 150
°C°CUnitV
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.Thermal data
Parameter
Thermal resistance junction-caseThermal resistance junction-ambient
D2PAK362.5
DPAK8100
TO-220550
TO-220FP
560
TO-3435
Unit°C/W°C/W
Table 3.
SymbolRthJCRthJA
Figure 4. Application circuits7/56
Test circuitsL78xx - L78xxC
4
Figure 5. Test circuits
DC parameter
Figure 6. Load regulation
Figure 7. Ripple rejection8/56
L78xx - L78xxCElectrical characteristics
5
Table 4.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics
Electrical characteristics of L7805 (refer to the test circuits, TJ = -55 to 150 °C, VI = 10 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 8 to 20 V
VI = 7 to 25 V, TJ = 25°CVI = 8 to 12 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 8 to 25 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 8 to 18 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
1.368
2170.752.2
1.23.32.5
0.6
40
Test conditions
Min.4.84.65
Typ.5531
Max.5.25.3550251002560.50.8
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
9/56
Electrical characteristicsTable 5.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
L78xx - L78xxC
Electrical characteristics of L7806 (refer to the test circuits, TJ = -55 to 150 °C, VI = 11 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 9 to 21 V
VI = 8 to 25 V, TJ = 25°CVI = 9 to 13 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 9 to 25 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 9 to 19 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
1.365
2190.752.2
1.23.32.5
0.7
40
Test conditions
Min.5.755.65
Typ.66
Max.6.256.3560301003060.50.8
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltageSupply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
10/56
L78xx - L78xxCElectrical characteristics
Table 6.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7808 (refer to the test circuits, TJ = -55 to 150 °C, VI = 14V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1A, PO ≤
VI = 11.5 to 23 V
VI = 10.5 to 25 V, TJ = 25°CVI = 11 to 17 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 11.5 to 25 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 11.5 to 21.5 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
1.362
2160.752.2
1.23.32.5
1
40
Test conditions
Min.7.77.6
Typ.88
Max.8.38.480401004060.50.8
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
11/56
Electrical characteristicsL78xx - L78xxC
Table 7.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7812 (refer to the test circuits, TJ = -55 to 150 °C, VI = 19 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 15.5 to 27 V
VI = 14.5 to 30 V, TJ = 25°CVI = 16 to 22 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 15 to 30 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 15 to 25 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
1.361
2180.752.2
1.23.32.5
1.5
40
Test conditions
Min.11.511.4
Typ.1212
Max.12.512.6120601006060.50.8
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
12/56
L78xx - L78xxCElectrical characteristics
Table 8.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7815 (refer to the test circuits, TJ = -55 to 150 °C, VI = 23 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 18.5 to 30 V
VI = 17.5 to 30 V, TJ = 25°CVI = 20 to 26 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 18.5 to 30 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 18.5 to 28.5 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
1.360
2190.752.2
1.23.32.5
1.8
40
Test conditions
Min.14.414.25
Typ.1515
Max.15.615.75150751507560.50.8
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
13/56
Electrical characteristicsL78xx - L78xxC
Table 9.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7818 (refer to the test circuits, TJ = -55 to 150 °C, VI = 26 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 22 to 33 V
VI = 21 to 33 V, TJ = 25°CVI = 24 to 30 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 22 to 33 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 22 to 32 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
1.359
2220.752.2
1.23.32.5
2.3
40
Test conditions
Min.17.317.1
Typ.1818
Max.18.718.9180901809060.50.8
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
14/56
L78xx - L78xxCElectrical characteristics
Table 10.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7820 (refer to the test circuits, TJ = -55 to 150 °C, VI = 28 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 24 to 35 V
VI = 22.5 to 35 V, TJ = 25°CVI = 26 to 32 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 24 to 35 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 24 to 35 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
1.358
2240.752.2
1.23.32.5
2.5
40
Test conditions
Min.19.219
Typ.2020
Max.20.82120010020010060.50.8
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
15/56
Electrical characteristicsL78xx - L78xxC
Table 11.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7824 (refer to the test circuits, TJ = -55 to 150 °C, VI = 33 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 28 to 38 V
VI = 27 to 38 V, TJ = 25°CVI = 30 to 36 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 28 to 38 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 28 to 38 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
1.356
2280.752.2
1.23.32.5
3
40
Test conditions
Min.2322.8
Typ.2424
Max.2525.224012024012060.50.8
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
16/56
L78xx - L78xxCElectrical characteristics
Table 12.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7805C (refer to the test circuits, TJ = 0 to 150 °C, VI = 10 V,IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 7 to 20 V
VI = 7 to 25 V, TJ = 25°CVI = 8 to 12 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 7 to 25 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 8 to 18 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
62
2170.752.2-1.140
Test conditions
Min.4.84.75
Typ.5531
Max.5.25.25100501005080.50.8
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
17/56
Electrical characteristicsL78xx - L78xxC
Table 13.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7852C (refer to the test circuits, TJ = 0 to 150 °C, VI = 10 V,IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 8 to 20 V
VI = 7 to 25 V, TJ = 25°CVI = 8 to 12 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 7 to 25 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 8 to 18 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
61
2170.752.2-142
Test conditions
Min.5.04.95
Typ.5.25.231
Max.5.45.45105521055280.51.3
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
18/56
L78xx - L78xxCElectrical characteristics
Table 14.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7806C (refer to the test circuits, TJ = 0 to 150 °C, VI = 11 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 8 to 21 V
VI = 8 to 25 V, TJ = 25°CVI = 9 to 13 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 8 to 25 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 9 to 19 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
59
2190.552.2-0.845
Test conditions
Min.5.755.7
Typ.66
Max.6.256.3120601206080.51.3
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltageSupply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
19/56
Electrical characteristicsL78xx - L78xxC
Table 15.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7808C (refer to the test circuits, TJ = 0 to 150 °C, VI = 14 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 10.5 to 25 V
VI = 10.5 to 25 V, TJ = 25°CVI = 11 to 17 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 10.5 to 25 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 11.5 to 21.5 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
56
2160.452.2-0.852
Test conditions
Min.7.77.6
Typ.88
Max.8.38.4160801608080.51
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
20/56
L78xx - L78xxCElectrical characteristics
Table 16.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7885C (refer to the test circuits, TJ = 0 to 150 °C, VI = 14.5 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 11 to 26 V
VI = 11 to 27 V, TJ = 25°CVI = 11.5 to 17.5 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 11 to 27 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 12 to 22V, f = 120HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
56
2160.452.2-0.855
Test conditions
Min.8.28.1
Typ.8.58.5
Max.8.88.9160801608080.51
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
21/56
Electrical characteristicsL78xx - L78xxC
Table 17.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7809C (refer to the test circuits, TJ = 0 to 150 °C, VI = 15 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 11.5 to 26 V
VI = 11.5 to 26 V, TJ = 25°CVI = 12 to 18 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 11.5 to 26 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 12 to 23 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
55
2170.402.2-170
Test conditions
Min.8.648.55
Typ.99
Max.9.369.45180901809080.51
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
22/56
L78xx - L78xxCElectrical characteristics
Table 18.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7810C (refer to the test circuits, TJ = 0 to 150 °C, VI = 15 V,IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 12.5 to 26 V
VI = 12.5 to 26 V, TJ = 25°CVI = 13.5 to 19 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 12.5 to 26 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 13 to 23 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
55
2170.402.2-170
Test conditions
Min.9.69.5
Typ.1010
Max.10.410.520010020010080.51
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
23/56
Electrical characteristicsL78xx - L78xxC
Table 19.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7812C (refer to the test circuits, TJ = 0 to 150 °C, VI = 19 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 14.5 to 27 V
VI = 14.5 to 30 V, TJ = 25°CVI = 16 to 22 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 14.5 to 30 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 15 to 25 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
55
2180.352.2-175
Test conditions
Min.11.511.4
Typ.1212
Max.12.512.624012024012080.51
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
24/56
L78xx - L78xxCElectrical characteristics
Table 20.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7815C (refer to the test circuits, TJ = 0 to 150 °C, VI = 23 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 17.5 to 30 V
VI = 17.5 to 30 V, TJ = 25°CVI = 20 to 26 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1AVI = 17.5 to 30 VIO = 5 mA
B =10 Hz to 100kHz, TJ = 25°CVI = 18.5 to 28.5 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
54
2190.232.2-190
Test conditions
Min.14.514.25
Typ.1515
Max.15.615.7530015030015080.51
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
25/56
Electrical characteristicsL78xx - L78xxC
Table 21.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7818C (refer to the test circuits, TJ = 0 to 150 °C, VI = 26 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 21 to 33 V
VI = 21 to 33 V, TJ = 25°CVI = 24 to 30 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 21 to 33 VIO = 5 mA
B = 10 Hz to 100 kHz, TJ = 25°CVI = 22 to 32 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
53
2220.202.1-1110
Test conditions
Min.17.317.1
Typ.1818
Max.18.718.936018036018080.51
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
26/56
L78xx - L78xxCElectrical characteristics
Table 22.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
Electrical characteristics of L7820C (refer to the test circuits, TJ = 0 to 150 °C, VI = 28 V,IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 23 to 35 V
VI = 22.5 to 35 V, TJ = 25°CVI = 26 to 32 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 23 to 35 VIO = 5 mA
B =10 Hz to 100 kHz, TJ = 25°CVI = 24 to 35 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
52
2240.182.1-1150
Test conditions
Min.19.219
Typ.2020
Max.20.82140020040020080.51
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
27/56
Electrical characteristicsTable 23.
SymbolVOVOΔVO(1)ΔVO(1)IdΔIdΔVO/ΔTeNSVRVdROIscIscp
L78xx - L78xxC
Electrical characteristics of L7824C (refer to the test circuits, TJ = 0 to 150 °C, VI = 33 V,IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified)
Parameter
Output voltageOutput voltageLine regulation
TJ = 25°C
15 WIO = 5 mA to 1 A, PO ≤
VI = 27 to 38 V
VI = 27 to 38 V, TJ = 25°CVI = 30 to 36 V, TJ = 25°CIO = 5 mA to 1.5 A, TJ = 25°CIO = 250 to 750 mA, TJ = 25°CTJ = 25°CIO = 5 mA to 1 AVI = 27 to 38 VIO = 5 mA
B = 10 Hz to 100 kHz, TJ = 25°CVI = 28 to 38 V, f = 120 HzIO = 1 A, TJ = 25°Cf = 1 kHz
VI = 35 V, TJ = 25°CTJ = 25°C
50
2280.152.1-1.5170
Test conditions
Min.2322.8
Typ.2424
Max.2525.248024048024080.51
UnitVVmV
Load regulationQuiescent currentQuiescent current changeOutput voltage driftOutput noise voltage Supply voltage rejectionDropout voltageOutput resistanceShort circuit currentShort circuit peak current
mVmAmAmV/°CµV/VOdBVmΩAA
1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
28/56
L78xx - L78xxCTypical performance
6 Typical performance
Figure 8.
Dropout voltage vs junction
temperatureFigure 9.
Peak output current vs input/output differential voltageFigure 10.Supply voltage rejection vs
frequency Figure 11.Output voltage vs junction
temperature Figure 12.Output impedance vs frequency Figure 13.Quiescent current vs junction temp. 29/56
Typical performanceL78xx - L78xxC
Figure 14.Load transient response Figure 15.Line transient response Figure 16.Quiescent current vs input voltage
Figure 17.Fixed output regulator 1.To specify an output voltage, substitute voltage value for \"XX\".
2.Although no output capacitor is need for stability, it does improve transient response.3.Required if regulator is locate an appreciable distance from power supply filter.
30/56
L78xx - L78xxC
Typical performance
Figure 18.Current regulator IO = VXX/R1+Id
Figure 19.Circuit for increasing output voltage IR1 ≥ 5 IdVO = VXX(1+R2/R1)+IdR2
Figure 20.Adjustable output regulator (7 to 30 V) 31/56Typical performance
L78xx - L78xxC
Figure 21.0.5 to 10 V regulator VO=VXXR4/R1
Figure 22.High current voltage regulator VBEQ1R1 = ______________IREQ-(IQ1/βQ1)VBEQ1IO = IREG + Q1 (IREG ______)R1
Figure 23.High output current with short circuit protection RSC=VBEQ2/ISC32/56
L78xx - L78xxC
Typical performance
Figure 24.Tracking voltage regulator
Figure 25.Split power supply (± 15 V - 1 A) * Against potential latch-up problems.
33/56
Typical performance
L78xx - L78xxC
Figure 26.Negative output voltage circuit
Figure 27.Switching regulator
Figure 28.High input voltage circuit VIN = VI - (VZ + VBE)34/56
L78xx - L78xxC
Figure 29.High input voltage circuit Typical performance
Figure 30.High output voltage regulator Figure 31.High input and output voltage VO = VXX + VZ135/56
Typical performance
L78xx - L78xxC
Figure 32.Reducing power dissipation with dropping resistor VI(min)-VXX-VDROP(max)R = ____________________IO(max)+Id(max)
Figure 33.Remote shutdown
Figure 34.Power AM modulator (unity voltage gain, IO ≤ 0.5) Note:
36/56
The circuit performs well up to 100 kHz.
L78xx - L78xxCTypical performance
Figure 35.Adjustable output voltage with temperature compensation VO = VXX (1+R2/R1) + VBENote:
Q2 is connected as a diode in order to compensate the variation of the Q1 VBE with the temperature. C allows a slow rise time of the VO.
Figure 36.Light controllers (VOmin = VXX + VBE) VO falls when the light goes upVO rises when the light goes up37/56
Typical performanceL78xx - L78xxC
Figure 37.Protection against input short-circuit with high capacitance loads 1.Application with high capacitance loads and an output voltage greater than 6 volts need an external diode
(see Figure32 on page36) to protect the device against input short circuit. In this case the input voltage falls rapidly while the output voltage decrease slowly. The capacitance discharges by means of the Base-Emitter junction of the series pass transistor in the regulator. If the energy is sufficiently high, the transistor may be destroyed. The external diode by-passes the current from the IC to ground.
38/56
L78xx - L78xxCPackage mechanical data
7 Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
39/56
Package mechanical dataL78xx - L78xxC
Figure 38.Drawing dimension TO-220 (type SMIC-subcon.) 0015988/F40/56
L78xx - L78xxCPackage mechanical data
Figure 39.Drawing dimension TO-220 (type STD-ST) 0015988/A41/56
Package mechanical dataL78xx - L78xxC
Table 24.TO-220 mechanical data
Type STD-ST
Type SMIC-Subcon.
mm.
Max.4.600.881.700.70
Min.4.470.801.15
0.560.38
15.25
1.27
10.002.404.951.236.202.4013.003.50
16.4028.90
3.752.65
3.852.95
2.72
10.402.705.151.326.602.7214.003.93
16.252.0413.35102.294.83
10.152.545.081.276.242.6713.503.9016.4028.743.832.74
2.8016.552.9213.6510.302.795.33
15.75
15.07
15.24
15.45
Typ.4.570.81
Max.4.670.861.44
Dim.
Min.
AA1b1cc1DD1Eee1FH1J1LL1L20L30∅PQ
4.400.611.140.49
mm.Typ.
Note:In spite of some difference in tolerances, the packages are compatible.
42/56
L78xx - L78xxCPackage mechanical data
Figure 40.Drawing dimension TO-220FP 7012510A-H43/56
Package mechanical dataL78xx - L78xxC
Table 25.
Dim.
TO-220FP mechanical data
mm.
Min.
Typ.
Max.4.602.72.750.7011.501.505.22.710.40
16
28.69.82.915.993
30.610.63.616.49.33.2
1.1260.3850.1140.6260.3540.118Min.0.1730.0980.0980.0170.0300.0450.0450.1940.0940.393
0.630
1.2040.4170.1420.6450.3660.126
inch.Typ.
Max.0.1810.1060.1080.0270.0390.0590.0590.2040.1060.409
ABDEFF1F2GG1HL2L3L4L5L6L7DIA.
4.402.52.50.450.751.151.154.952.410.0
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L78xx - L78xxC
Package mechanical data
Figure 41.Drawing dimension TO-3 PGADCUVONRP003C/CTable 26.
Dim.
TO-3 mechanical data
mm.
Min.
Typ.11.85
0.96
1.05
1.101.708.720.0
10.916.9
26.2
3.88
4.0939.5
30.10
1.185
0.152
0.4290.665
1.0310.1611.555
0.037
Max.
Min.
inch.Typ.0.4660.041
0.0430.0660.3420.787Max.
ABCDEGNPRUV
BE45/56
Package mechanical dataL78xx - L78xxC
Figure 42.Drawing dimension DPAK 0068772-F46/56
L78xx - L78xxCPackage mechanical data
Table 27.
Dim.
DPAK mechanical data
mm.
Min.
Typ.
Max.2.41.10.230.95.40.60.66.2
5.1
6.4
4.72.28
4.49.351
2.80.8
0.6
0.2
0°
8°
0°
1
0.023
0.008
8°
4.610.1
0.1730.3680.039
0.1100.031
0.039
6.6
0.252
0.1850.090
0.1810.397
Min.0.0860.0350.0010.0250.2040.0170.0190.236
0.200
0.260
inch.Typ.
Max.0.0940.0430.0090.0350.2120.0230.0230.244
AA1A2Bb4CC2DD1EE1ee1HL(L1)L2L4RV2
2.20.90.030.645.20.450.486
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Package mechanical dataL78xx - L78xxC
Figure 43.Drawing dimension tape and reel for DPAK Table 28.
Dim.
Tape and reel DPAK mechanical data
mm.
Min.
Typ.
Max.330
12.820.260
22.4
6.8010.402.553.97.9
6.9010.502.654.08.0
7.0010.602.754.18.1
0.2680.4090.1000.1530.311
0.2720.4130.1040.1570.315
13.0
13.2
0.5040.7952.362
0.8820.2.760.4170.1050.1610.319
0.512
Min.
inch.Typ.
Max.12.9920.519
ACDNTAoBoKoPoP
48/56
L78xx - L78xxCPackage mechanical data
Figure 44.Drawing dimension D²PAK (type STD-ST) 0079457/L49/56
Package mechanical dataL78xx - L78xxC
Figure 45.Drawing dimension D²PAK (type WOOSEOK-Subcon.) 0079457/L50/56
L78xx - L78xxCPackage mechanical data
Table 29.
D²PAK mechanical data
TYPE STD-ST
TYPE WOOSEOK-Subcon.
mm.
Max.4.600.230.931.700.601.369.35
Min.4.3000.701.170.451.2597.50
10.40
9.807.50
2.54
4.88152.492.291.271.30
0.4
0°
8°
0°
5.2815.852.692.791.401.75
152.201.7911.20
0.30
3°
2.545.0815.30
15.602.602.791.401.6010.20
0.501.309.20Typ.
Max.4.700.200.901.370.601.409.40
Dim.
Min.
AA1bb2cc2DD1EE1ee1HJ1LL1L2RV2
4.400.030.701.140.451.238.957.50108.50
mm.Typ.
Note:
The D²PAK package coming from the subcontractor Wooseok is fully compatible with the ST's package suggested footprint.
51/56
Package mechanical dataL78xx - L78xxC
Figure 46.D²PAK footprint recommended data Table 30.D²PAK footprint data
Values
Dim.ABCDEFG
mm.12.209.7516.903.501.602.545.08
inch.0.4800.3840.6650.1380.0630.1000.200
52/56
L78xx - L78xxCPackage mechanical data
Table 31.
Dim.
Tape and reel D²PAK mechanical data
mm.
Min.
Typ.
Max.180
12.820.260
14.4
10.5015.704.803.911.9
10.615.804.904.012.0
10.7015.905.004.112.1
0.4130.6180.1890.1530.468
0.4170.6220.1930.1570.472
13.0
13.2
0.5040.7952.362
0.5670.4210.6260.1970.1610.476
0.512
Min.
inch.Typ.
Max.7.0860.519
ACDNTAoBoKoPoP
Figure 47.Drawing dimension tape and reel for D²PAK 53/56
Order codesL78xx - L78xxC
8 Order codes
Table 32.
Order codes
Order codes
Part numbers
TO-220
L7805L7805CL7806CL7808CL7885CL7809CL7812CL7815CL7818CL7824C
L7805CVL7806CVL7808CVL7885CVL7809CVL7812CVL7815CVL7818CVL7824CV
L7805CDT-TR
L7805CD2T-TRL7806CD2T-TRL7808CD2T-TRL7885CD2T-TR (1)L7809CD2T-TRL7812CD2T-TRL7815CD2T-TRL7818CD2T-TR (1)L7824CD2T-TR
L7824CPL7808CPL7885CP (1)L7809CPL7812CPL7815CP
L7812CTL7815CTL7818CTL7824CTL7885CT (1)
L7805CP
DPAK
D2PAK
TO-220FP
TO-3L7805TL7805CTL7806CT
1.Available on request.
54/56
L78xx - L78xxCRevision history
9
Table 33.
Date
Revision history
Document revision history
Revision
1213141516171819
Document updating.
Order codes has been updated and new template.
D2PAK mechanical data has been updated and add footprint data.Order codes has been updated.Added Table1 in cover page.Modified: Table32.
Added: TO-220 mechanical data Figure38 on page40, Figure39 on page41 and Table24 on page42. Modified: Table32 on page54.
Added: Table27: DPAK mechanical data on page47., Table28: Tape and reel DPAK mechanical data on page48. Modified: Table32 on page54.
Changes
21-Jun-200403-Aug-200619-Jan-200731-May-200729-Aug-200711-Dec-200706-Feb-200818-Mar-2008
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L78xx - L78xxC
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