L4940XX datasheet(10/23 Pages) STMICROELECTRONICS

Part #	L4940XX

Description	Very low drop 1.5 A regulator

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Electrical characteristics

L4940xx

10/23

Table 7.

Electrical characteristics of L4940xx12 (Refer to test circuit, VI = 14 V, CI = 0.1 µF,

CO = 22 µF, TJ = 25°C, unless otherwise specified.)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VO

Output voltage

IO = 500 mA

11.75

12

12.25

V

VO

Output voltage

IO = 5 mA to 1.5 A, VI = 11.7 to 15 V

11.5

12

12.5

V

VI

Input voltage

IO = 5 mA

17

V

ΔVO

Line regulation

VI = 11 to 17 V, IO = 5 mA

3

7

mV

ΔVO

Load regulation

IO = 5 mA to 1.5 A

15

35

mV

IO = 0.5 A to 1 A

10

25

mV

Iq

Quiescent current

IO = 5 mA

4

8

mA

IO = 1.5 A, VI = 11.7 V

30

50

mA

ΔIq

Quiescent current change

IO = 5 mA

1.5

mA

IO = 1.5 A, VI = 11.7 to 16 V

10

mA

ΔVO/ΔT Output voltage drift

1.2

mV/°C

SVR

Supply voltage rejection

f = 120 Hz, IO = 1 A

55

61

dB

Vd

Dropout voltage

IO = 0.5 A

200

400

mV

IO = 1.5 A

500

900

mV

Isc

Short circuit current

VI = 14 V

2

2.7

A

ZO

Output impedance

f = 120 Hz, IO = 0.5 A

40

m

Ω

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