L7810CV(068) - STMICROELECTRONICS

TO-220FPTO-220

D²PAK

DPAK

Features

• Output current up to 1.5 A

• Output voltages of 5; 6; 8; 8.5; 9; 12; 15; 18; 24 V

• Thermal overload protection

• Short circuit protection

• Output transition SOA protection

• 2 % output voltage tolerance (A version)

• Guaranteed in extended temperature range (A version)

Description

The L78 series of three-terminal positive regulators is available in TO-220,

TO-220FP, 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 embeds 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.

Maturity status link

L78

Positive voltage regulator ICs

L78

Datasheet

DS0422 - Rev 36 - September 2018

For further information contact your local STMicroelectronics sales office.

www.st.com

1Diagram

Figure 2. Block diagram

GAMG220920161000MT

L78

Diagram

DS0422 - Rev 36 page 2/55

2Pin configuration

Figure 3. Pin connections (top view)

TO-220FP

TO-220

D²PAK DPAK

GAMG220920161001MT

Figure 4. Schematic diagram

GAMG220920161002MT

L78

Pin configuration

DS0422 - Rev 36 page 3/55

3Maximum ratings

Table 1. Absolute maximum ratings

Symbol Parameter Value Unit

VIDC input voltage

for VO= 5 to 18 V 35

for VO= 20, 24 V 40

IOOutput current Internally limited

PDPower dissipation Internally limited

TSTG Storage temperature range -65 to 150 °C

TOP Operating junction temperature range

for L78xxC, L78xxAC 0 to 125

°C

for L78xxAB -40 to 125

Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional

operation under these condition is not implied.

Table 2. Thermal data

Symbol Parameter D²PAK DPAK TO-220 TO-220FP Unit

RthJC Thermal resistance junction-case 3 8 5 5 °C/W

RthJA Thermal resistance junction-ambient 62.5 100 50 60 °C/W

Figure 5. Application circuits

GAMG220920161003MT

L78

Maximum ratings

DS0422 - Rev 36 page 4/55

4Test circuits

Figure 6. DC parameter

GAMG220920161004MT

Figure 7. Load regulation

GAMG220920161005MT

Figure 8. Ripple rejection

GAMG220920161006MT

L78

Test circuits

DS0422 - Rev 36 page 5/55

5Electrical characteristics

VI = 10 V, IO = 1 A, TJ = 0 to 125 °C (L7805AC), TJ = -40 to 125 °C (L7805AB), unless otherwise specified.

Table 3. Electrical characteristics of L7805A

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 4.9 5 5.1 V

VOOutput voltage IO = 5 mA to 1 A, VI = 7.5 to 18 V 4.8 5 5.2 V

VOOutput voltage IO = 1 A, VI = 18 to 20 V, TJ = 25 °C 4.8 5 5.2 V

∆VO (1) Line regulation

VI = 7.5 to 25 V, IO = 500 mA, TJ = 25 °C 7 50 mV

VI = 8 to 12 V 10 50 mV

VI = 8 to 12 V, TJ = 25 °C 2 25 mV

VI = 7.3 to 20 V, TJ = 25 °C 7 50 mV

∆VO (1) Load regulation

IO = 5 mA to 1 A 25 100

IO = 5 mA to 1.5 A, TJ = 25 °C 30 100

IO = 250 to 750 mA 8 50

IqQuiescent current

TJ = 25 °C 4.3 6 mA

6 mA

∆IqQuiescent current change

VI = 8 to 23 V, IO = 500 mA 0.8 mA

VI = 7.5 to 20 V, TJ = 25 °C 0.8 mA

IO = 5 mA to 1 A 0.5 mA

SVR Supply voltage rejection VI = 8 to 18 V, f = 120 Hz, IO = 500 mA 68 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

eN Output noise voltage TA = 25 °C, B =10 Hz to 100 kHz 10 µV/VO

ROOutput resistance f = 1 kHz 17 mΩ

Isc Short circuit current VI = 35 V, TA = 25 °C 0.2 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

∆VO/∆T Output voltage drift -1.1 mV/°C

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 6/55

VI = 11 V, IO = 1 A, TJ = 0 to 125 °C (L7806AC), TJ = -40 to 125 °C (L7806AB), unless otherwise specified.

Table 4. Electrical characteristics of L7806A

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 5.88 6 6.12 V

VOOutput voltage IO = 5 mA to 1 A, VI = 8.6 to 19 V 5.76 6 6.24 V

VOOutput voltage IO = 1 A, VI = 19 to 21 V, TJ = 25 °C 5.76 6 6.24 V

∆VO (1) Line regulation

VI = 8.6 to 25 V, IO = 500 mA, TJ = 25 °C 9 60 mV

VI = 9 to 13 V 11 60 mV

VI = 9 to 13 V, TJ = 25 °C 3 30 mV

VI = 8.3 to 21 V, TJ = 25 °C 9 60 mV

∆VO (1) Load regulation

IO = 5 mA to 1 A 25 100

IO = 5 mA to 1.5 A, TJ = 25 °C 30 100

IO = 250 to 750 mA 10 50

IqQuiescent current

TJ = 25° C 4.3 6 mA

6 mA

∆IqQuiescent current change

VI = 9 to 24 V, IO = 500 mA 0.8 mA

VI = 8.6 to 21 V, TJ = 25 °C 0.8 mA

IO = 5 mA to 1 A 0.5 mA

SVR Supply voltage rejection VI = 9 to 19 V, f = 120 Hz, IO = 500 mA 65 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

eN Output noise voltage TA = 25 °C, B =10 Hz to 100 kHz 10 µV/VO

ROOutput resistance f = 1 kHz 17 mΩ

Isc Short circuit current VI = 35 V, TA = 25 °C 0.2 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

∆VO/∆T Output voltage drift -0.8 mV/°C

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 7/55

VI = 14 V, IO = 1 A, TJ = 0 to 125 °C (L7808AC), TJ = -40 to 125 °C (L7808AB), unless otherwise specified.

Table 5. Electrical characteristics of L7808A

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 7.84 8 8.16 V

VOOutput voltage IO = 5 mA to 1 A, VI = 10.6 to 21 V 7.7 8 8.3 V

VOOutput voltage IO = 1 A, VI = 21 to 23 V, TJ = 25 °C 7.7 8 8.3 V

∆VO (1) Line regulation

VI = 10.6 to 25 V, IO = 500 mA, TJ = 25 °C 12 80 mV

VI = 11 to 17 V 15 80 mV

VI = 11 to 17 V, TJ = 25 °C 5 40 mV

VI = 10.4 to 23 V, TJ = 25 °C 12 80 mV

∆VO (1) Load regulation

IO = 5 mA to 1 A 25 100

IO = 5 mA to 1.5 A, TJ = 25 °C 30 100

IO = 250 to 750 mA 10 50

IqQuiescent current

TJ = 25 °C 4.3 6 mA

6 mA

∆IqQuiescent current change

VI = 11 to 23 V, IO = 500 mA 0.8 mA

VI = 10.6 to 23 V, TJ = 25 °C 0.8 mA

IO = 5 mA to 1 A 0.5 mA

SVR Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz, IO = 500 mA 62 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

eN Output noise voltage TA = 25 °C, B =10 Hz to 100 kHz 10 µV/VO

ROOutput resistance f = 1 kHz 18 mΩ

Isc Short circuit current VI = 35 V, TA = 25 °C 0.2 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

∆VO/∆T Output voltage drift -0.8 mV/°C

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 8/55

VI = 15 V, IO = 1 A, TJ = 0 to 125 °C (L7809AC), TJ = -40 to 125 °C (L7809AB), unless otherwise

specified(Minimum load current for regulation is 5 mA.)

Table 6. Electrical characteristics of L7809A

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 8.82 9 9.18 V

VOOutput voltage IO = 5 mA to 1 A, VI = 10.6 to 22 V 8.65 9 9.35 V

VOOutput voltage IO = 1 A, VI = 22 to 24 V, TJ = 25 °C 8.65 9 9.35 V

∆VO (1) Line regulation

VI = 10.6 to 25 V, IO = 500 mA, TJ = 25 °C 12 90 mV

VI = 11 to 17 V 15 90 mV

VI = 11 to 17 V, TJ = 25 °C 5 45 mV

VI = 11.4 to 23 V, TJ = 25 °C 12 90 mV

∆VO (1) Load regulation

IO = 5 mA to 1 A 25 100

IO = 5 mA to 1.5 A, TJ = 25 °C 30 100

IO = 250 to 750 mA 10 50

IqQuiescent current

TJ = 25 °C 4.3 6 mA

6 mA

∆IqQuiescent current change

VI = 11 to 25 V, IO = 500 mA 0.8 mA

VI = 10.6 to 23 V, TJ = 25 °C 0.8 mA

IO = 5 mA to 1 A 0.5 mA

SVR Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz, IO = 500 mA 61 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

eN Output noise voltage TA = 25 °C, B =10 Hz to 100 kHz 10 µV/VO

ROOutput resistance f = 1 kHz 18 mΩ

Isc Short circuit current VI = 35 V, TA = 25 °C 0.2 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

∆VO/∆T Output voltage drift -0.8 mV/°C

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 9/55

VI = 19 V, IO = 1 A, TJ = 0 to 125 °C (L7812AC), TJ = -40 to 125 °C (L7812AB), unless otherwise specified.

Table 7. Electrical characteristics of L7812A

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 11.75 12 12.25 V

VOOutput voltage IO = 5 mA to 1 A, VI = 14.8 to 25 V 11.5 12 12.5 V

VOOutput voltage IO = 1 A, VI = 25 to 27 V, TJ = 25 °C 11.5 12 12.5 V

∆VO (1) Line regulation

VI = 14.8 to 30 V, IO = 500 mA, TJ = 25 °C 13 120 mV

VI = 16 to 12 V 16 120 mV

VI = 16 to 12 V, TJ = 25 °C 6 60 mV

VI = 14.5 to 27 V, TJ = 25 °C 13 120 mV

∆VO (1) Load regulation

IO = 5 mA to 1 A 25 100

IO = 5 mA to 1.5 A, TJ = 25 °C 30 100

IO = 250 to 750 mA 10 50

IqQuiescent current

TJ = 25 °C 4.4 6 mA

6 mA

DIqQuiescent current change

VI = 15 to 30 V, IO = 500 mA 0.8 mA

VI = 14.8 to 27 V, TJ = 25 °C 0.8 mA

IO = 5 mA to 1 A 0.5 mA

SVR Supply voltage rejection VI = 15 to 25 V, f = 120 Hz, IO = 500 mA 60 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

eN Output noise voltage TA = 25 °C, B = 10 Hz to 100 kHz 10 µV/VO

ROOutput resistance f = 1 kHz 18 mΩ

Isc Short circuit current VI = 35 V, TA = 25 °C 0.2 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

∆VO/∆T Output voltage drift -1 mV/°C

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 10/55

VI = 23 V, IO = 1 A, TJ = 0 to 125 °C (L7815AC), TJ = -40 to 125 °C (L7815AB), unless otherwise specified.

Table 8. Electrical characteristics of L7815A

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 14.7 15 15.3 V

VOOutput voltage IO = 5 mA to 1 A, VI = 17.9 to 28 V 14.4 15 15.6 V

VOOutput voltage IO = 1 A, VI = 28 to 30 V, TJ = 25 °C 14.4 15 15.6 V

∆VO (1) Line regulation

VI = 17.9 to 30 V, IO = 500 mA, TJ = 25 °C 13 150 mV

VI = 20 to 26 V 16 150 mV

VI = 20 to 26 V, TJ = 25 °C 6 75 mV

VI = 17.5 to 30 V, TJ = 25 °C 13 150 mV

∆VO (1) Load regulation

IO = 5 mA to 1 A 25 100

IO = 5 mA to 1.5 A, TJ = 25 °C 30 100

IO = 250 to 750 mA 10 50

IqQuiescent current

TJ = 25 °C 4.4 6 mA

6 mA

∆IqQuiescent current change

VI = 17.5 to 30 V, IO = 500 mA 0.8 mA

VI = 17.5 to 30 V, TJ = 25 °C 0.8 mA

IO = 5 mA to 1 A 0.5 mA

SVR Supply voltage rejection VI = 18.5 to 28.5 V, f = 120 Hz, IO = 500 mA 58 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

eN Output noise voltage TA = 25 °C, B = 10Hz to 100 kHz 10 µV/VO

ROOutput resistance f = 1 kHz 19 mΩ

Isc Short circuit current VI = 35 V, TA = 25 °C 0.2 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

∆VO/∆T Output voltage drift -1 mV/°C

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 11/55

VI = 33 V, IO = 1 A, TJ = 0 to 125 °C (L7824AC), TJ = -40 to 125 °C (L7824AB), unless otherwise specified.

Table 9. Electrical characteristics of L7824A

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 23.5 24 24.5 V

VOOutput voltage IO = 5 mA to 1 A, VI = 27.3 to 37 V 23 24 25 V

VOOutput voltage IO = 1 A, VI = 37 to 38 V, TJ = 25 °C 23 24 25 V

∆VO (1) Line regulation

VI = 27 to 38 V, IO = 500 mA, TJ = 25 °C 31 240 mV

VI = 30 to 36 V 35 200 mV

VI = 30 to 36 V, TJ = 25 °C 14 120 mV

VI = 26.7 to 38 V, TJ = 25 °C 31 240 mV

∆VO (1) Load regulation

IO = 5 mA to 1 A 25 100

IO = 5 mA to 1.5 A, TJ = 25 °C 30 100

IO = 250 to 750 mA 10 50

IqQuiescent current

TJ = 25 °C 4.6 6 mA

6 mA

∆IqQuiescent current change

VI = 27.3 to 38 V, IO = 500 mA 0.8 mA

VI = 27.3 to 38 V, TJ = 25 °C 0.8 mA

IO = 5 mA to 1 A 0.5 mA

SVR Supply voltage rejection VI = 28 to 38 V, f = 120 Hz, IO = 500 mA 54 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

eN Output noise voltage TA = 25 °C, B = 10 Hz to 100 kHz 10 µV/VO

ROOutput resistance f = 1 kHz 20 m

Isc Short circuit current VI = 35 V, TA = 25 °C 0.2 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

∆VO/∆T Output voltage drift -1.5 mV/°C

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 12/55

Refer to the test circuits, TJ = 0 to 125 °C, VI = 10 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise

specified.

Table 10. Electrical characteristics of L7805C

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 4.8 5 5.2 V

VOOutput voltage IO = 5 mA to 1 A, VI = 7 to 18 V 4.75 5 5.25 V

VOOutput voltage IO = 1 A, VI = 18 to 20V, TJ = 25 °C 4.75 5 5.25 V

∆VO (1) Line regulation

VI = 7 to 25 V, TJ = 25 °C 3 100

VI = 8 to 12 V, TJ = 25 °C 1 50

∆VO (1) Load regulation

IO = 5 mA to 1.5 A, TJ = 25 °C 100

IO = 250 to 750 mA, TJ = 25 °C 50

IdQuiescent current TJ = 25° C 8 mA

∆IdQuiescent current change

IO = 5 mA to 1 A 0.5

VI = 7 to 23 V 0.8

∆VO/∆T Output voltage drift IO = 5 mA -1.1 mV/°C

eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 40 µV/VO

SVR Supply voltage rejection VI = 8 to 18 V, f = 120 Hz 62 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

ROOutput resistance f = 1 kHz 17 mΩ

Isc Short circuit current VI = 35 V, TJ = 25 °C 0.75 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 13/55

Refer to the test circuits, TJ = 0 to 125 °C, VI = 11 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise

specified.

Table 11. Electrical characteristics of L7806C

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 5.75 6 6.25 V

VOOutput voltage IO = 5 mA to 1 A, VI = 8 to 19 V 5.7 6 6.3 V

VOOutput voltage IO = 1 A, VI = 19 to 21 V, TJ = 25 °C 5.7 6 6.3 V

∆VO (1) Line regulation

VI = 8 to 25 V, TJ = 25 °C 120

VI = 9 to 13 V, TJ = 25 °C 60

∆VO (1) Load regulation

IO = 5 mA to 1.5 A, TJ = 25 °C 120

IO = 250 to 750 mA, TJ = 25 °C 60

IdQuiescent current TJ = 25 °C 8 mA

DIdQuiescent current change

IO = 5 mA to 1 A 0.5

VI = 8 to 24 V 1.3

∆VO/∆T Output voltage drift IO = 5 mA -0.8 mV/°C

eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 45 µV/VO

SVR Supply voltage rejection VI = 9 to 19 V, f = 120 Hz 59 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

ROOutput resistance f = 1 kHz 19 mΩ

Isc Short circuit current VI = 35 V, TJ = 25 °C 0.55 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 14/55

Refer to the test circuits, TJ = 0 to 125 °C, VI = 14 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise

specified.

Table 12. Electrical characteristics of L7808C

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 7.7 8 8.3 V

VOOutput voltage IO = 5 mA to 1 A, VI = 10.5 to 21 V 7.6 8 8.4 V

VOOutput voltage IO = 1 A, VI = 21 to 25 V, TJ = 25 °C 7.6 8 8.4 V

∆VO (1) Line regulation

VI = 10.5 to 25 V, TJ = 25 °C 160

VI = 11 to 17 V, TJ = 25 °C 80

∆VO (1) Load regulation

IO = 5 mA to 1.5 A, TJ = 25 °C 160

IO = 250 to 750 mA, TJ = 25 °C 80

IdQuiescent current TJ = 25 °C 8 mA

∆IdQuiescent current change

IO = 5 mA to 1 A 0.5

VI = 10.5 to 25 V 1

∆VO/∆T Output voltage drift IO = 5 mA -0.8 mV/°C

eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 52 µV/VO

SVR Supply voltage rejection VI = 11.5 to 21.5 V, f = 120 Hz 56 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

ROOutput resistance f = 1 kHz 16 mΩ

Isc Short circuit current VI = 35 V, TJ = 25 °C 0.45 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 15/55

Refer to the test circuits, TJ = 0 to 125 °C, VI = 14.5 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise

specified.

Table 13. Electrical characteristics of L7885C

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 8.2 8.5 8.8 V

VOOutput voltage IO = 5 mA to 1 A, VI = 11 to 21.5 V 8.1 8.5 8.9 V

VOOutput voltage IO = 1 A, VI = 21.5 to 26 V, TJ = 25 °C 8.1 8.5 8.9 V

∆VO (1) Line regulation

VI = 11 to 27 V, TJ = 25 °C 160

VI = 11.5 to 17.5 V, TJ = 25 °C 80

∆VO (1) Load regulation

IO = 5 mA to 1.5 A, TJ = 25 °C 160

IO = 250 to 750 mA, TJ = 25 °C 80

IdQuiescent current TJ = 25 °C 8 mA

∆IdQuiescent current change

IO = 5 mA to 1 A 0.5

VI = 11 to 26 V 1

∆VO/∆T Output voltage drift IO = 5 mA -0.8 mV/°C

eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 55 µV/VO

SVR Supply voltage rejection VI = 12 to 22 V, f = 120 Hz 56 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

ROOutput resistance f = 1 kHz 16 mΩ

Isc Short circuit current VI = 35 V, TJ = 25 °C 0.45 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 16/55

Refer to the test circuits, TJ = 0 to 125 °C, VI = 15 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise

specified.

Table 14. Electrical characteristics of L7809C

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 8.64 9 9.36 V

VOOutput voltage IO = 5 mA to 1 A, VI = 11.5 to 22 V 8.55 9 9.45 V

VOOutput voltage IO = 1 A, VI = 22 to 26 V, TJ = 25 °C 8.55 9 9.45 V

∆VO (1) Line regulation

VI = 11.5 to 26 V, TJ = 25 °C 180

VI = 12 to 18 V, TJ = 25 °C 90

∆VO (1) Load regulation

IO = 5 mA to 1.5 A, TJ = 25 °C 180

IO = 250 to 750 mA, TJ = 25 °C 90

IdQuiescent current TJ = 25 °C 8 mA

∆IdQuiescent current change

IO = 5 mA to 1 A 0.5

VI = 11.5 to 26 V 1

∆VO/∆T Output voltage drift IO = 5 mA -1 mV/°C

eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 70 µV/VO

SVR Supply voltage rejection VI = 12 to 23 V, f = 120 Hz 55 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

ROOutput resistance f = 1 kHz 17 mΩ

Isc Short circuit current VI = 35 V, TJ = 25 °C 0.40 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 17/55

Refer to the test circuits, TJ = 0 to 125 °C, VI = 19 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise

specified.

Table 15. Electrical characteristics of L7812C

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 11.5 12 12.5 V

VOOutput voltage IO = 5 mA to 1 A, VI = 14.5 to 25 V 11.4 12 12.6 V

VOOutput voltage IO = 1 A, VI = 25 to 27 V, TJ = 25 °C 11.4 12 12.6 V

∆VO (1) Line regulation

VI = 14.5 to 30 V, TJ = 25 °C 240

VI = 16 to 22 V, TJ = 25 °C 120

∆VO (1) Load regulation

IO = 5 mA to 1.5 A, TJ = 25 °C 240

IO = 250 to 750 mA, TJ = 25 °C 120

IdQuiescent current TJ = 25 °C 8 mA

∆IdQuiescent current change

IO = 5 mA to 1 A 0.5

VI = 14.5 to 30 V 1

∆VO/∆T Output voltage drift IO = 5 mA -1 mV/°C

eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 75 µV/VO

SVR Supply voltage rejection VI = 15 to 25 V, f = 120 Hz 55 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

ROOutput resistance f = 1 kHz 18 mΩ

Isc Short circuit current VI = 35 V, TJ = 25 °C 0.35 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 18/55

Refer to the test circuits, TJ = 0 to 125 °C, VI = 23 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise

specified.

Table 16. Electrical characteristics of L7815C

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 14.4 15 15.6 V

VOOutput voltage IO = 5 mA to 1 A, VI = 17.5 to 28 V 14.25 15 15.75 V

VOOutput voltage IO = 1 A, VI = 28 to 30 V, TJ = 25 °C 14.25 15 15.75 V

∆VO (1) Line regulation

VI = 17.5 to 30 V, TJ = 25 °C 300

VI = 20 to 26 V, TJ = 25 °C 150

∆VO (1) Load regulation

IO = 5 mA to 1.5 A, TJ = 25 °C 300

IO = 250 to 750 mA, TJ = 25 °C 150

IdQuiescent current TJ = 25 °C 8 mA

∆IdQuiescent current change

IO = 5 mA to 1A 0.5

VI = 17.5 to 30 V 1

∆VO/∆T Output voltage drift IO = 5 mA -1 mV/°C

eN Output noise voltage B = 10 Hz to 100kHz, TJ = 25 °C 90 µV/VO

SVR Supply voltage rejection VI = 18.5 to 28.5 V, f = 120 Hz 54 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

ROOutput resistance f = 1 kHz 19 mΩ

Isc Short circuit current VI = 35 V, TJ = 25 °C 0.23 A

Iscp Short circuit peak current TJ = 25 °C 2.2 A

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 19/55

Refer to the test circuits, TJ = 0 to 125 °C, VI = 26 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise

specified.

Table 17. Electrical characteristics of L7818C

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 17.3 18 18.7 V

VOOutput voltage IO = 5 mA to 1 A, VI = 21 to 31 V 17.1 18 18.9 V

VOOutput voltage IO = 1 A, VI = 31 to 33 V, TJ = 25 °C 17.1 18 18.9 V

∆VO (1) Line regulation

VI = 21 to 33 V, TJ = 25 °C 360

VI = 24 to 30 V, TJ = 25 °C 180

∆VO (1) Load regulation

IO = 5 mA to 1.5 A, TJ = 25 °C 360

IO = 250 to 750 mA, TJ = 25 °C 180

IdQuiescent current TJ = 25 °C 8 mA

∆IdQuiescent current change

IO = 5 mA to 1 A 0.5

VI = 21 to 33 V 1

∆VO/∆T Output voltage drift IO = 5 mA -1 mV/°C

eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 110 µV/VO

SVR Supply voltage rejection VI = 22 to 32 V, f = 120 Hz 53 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

ROOutput resistance f = 1 kHz 22 mΩ

Isc Short circuit current VI = 35 V, TJ = 25 °C 0.20 A

Iscp Short circuit peak current TJ = 25 °C 2.1 A

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 20/55

Refer to the test circuits, TJ = 0 to 125 °C, VI = 33 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise

specified.

Table 18. Electrical characteristics of L7824C

Symbol Parameter Test conditions Min. Typ. Max. Unit

VOOutput voltage TJ = 25 °C 23 24 25 V

VOOutput voltage IO = 5 mA to 1 A, VI = 27 to 37 V 22.8 24 25.2 V

VOOutput voltage IO = 1 A, VI = 37 to 38 V, TJ = 25 °C 22.8 24 25.2 V

∆VO (1) Line regulation

VI = 27 to 38 V, TJ = 25 °C 480

VI = 30 to 36 V, TJ = 25 °C 240

∆VO (1) Load regulation

IO = 5 mA to 1.5 A, TJ = 25 °C 480

IO = 250 to 750 mA, TJ = 25 °C 240

IdQuiescent current TJ = 25 °C 8 mA

∆IdQuiescent current change

IO = 5 mA to 1 A 0.5

VI = 27 to 38 V 1

∆VO/∆T Output voltage drift IO = 5 mA -1.5 mV/°C

eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C 170 µV/VO

SVR Supply voltage rejection VI = 28 to 38 V, f = 120 Hz 50 dB

VdDropout voltage IO = 1 A, TJ = 25 °C 2 V

ROOutput resistance f = 1 kHz 28 mΩ

Isc Short circuit current VI = 35 V, TJ = 25° C 0.15 A

Iscp Short circuit peak current TJ = 25 °C 2.1 A

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.

Note: Minimum load current for regulation is 5 mA.

L78

Electrical characteristics

DS0422 - Rev 36 page 21/55

6Application information

6.1 Design consideration

The L78 Series of fixed voltage regulators are designed with thermal overload protection that shuts down the

circuit when subjected to an excessive power overload condition, internal short-circuit protection that limits the

maximum current the circuit will pass, and output transistor safe-area compensation that reduces the output short-

circuit current as the voltage across the pass transistor is increased. In many low current applications,

compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with

capacitor if the regulator is connected to the power supply filter with long lengths, or if the output load capacitance

is large. An input bypass capacitor should be selected to provide good high frequency characteristics to insure

stable operation under all load conditions. A 0.33 µF or larger tantalum, mylar or other capacitor having low

internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the

shortest possible leads directly across the regulators input terminals. Normally good construction techniques

should be used to minimize ground loops and lead resistance drops since the regulator has no external sense

lead.

The addition of an operational amplifier allows adjustment to higher or intermediate values while retaining

regulation characteristics. The minimum voltage obtained with the arrangement is 2 V greater than the regulator

voltage.

The circuit of Figure 14. High current voltage regulator can be modified to provide supply protection against short

circuit by adding a short circuit sense resistor, RSC, and an additional PNP transistor. The current sensing PNP

must be able to handle the short circuit current of the three terminal regulator Therefore a four ampere plastic

power transistor is specified.

Figure 9. Fixed output regulator

GAMG220920161007MT

1. Although no output capacitor is need for stability, it does improve transient response.

2. Required if regulator is located an appreciable distance from power supply filter.

L78

Application information

DS0422 - Rev 36 page 22/55