L7812C datasheet(24/57 Pages) STMICROELECTRONICS

Part #	L7812C

Description	Positive voltage regulator ICs

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Electrical characteristics

L78xx, L78xxC, L78xxAB, L78xxAC

24/57

Doc ID 2143 Rev 30

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 19.

Electrical characteristics of L7815C

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VO

Output voltage

TJ = 25°C

14.5

15

15.6

V

VO

Output voltage

IO = 5 mA to 1 A, VI = 17.5 to 28 V

14.25

15

15.75

V

VO

Output voltage

IO = 1 A, VI = 28 to 30 V, TJ = 25°C

14.25

15

15.75

V

ΔVO(1)

Line regulation

VI = 17.5 to 30 V, TJ = 25°C

300

mV

VI = 20 to 26 V, TJ = 25°C

150

ΔVO(1)

Load regulation

IO = 5 mA to 1.5 A, TJ = 25°C

300

mV

IO = 250 to 750 mA, TJ = 25°C

150

Id

Quiescent current

TJ = 25°C

8

mA

ΔId

Quiescent current change

IO = 5 mA to 1A

0.5

mA

VI = 17.5 to 30 V

1

ΔVO/ΔT 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

Vd

Dropout voltage

IO = 1 A, TJ = 25°C

2

V

RO

Output resistance

f = 1 kHz

19

m

Ω

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.

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