L5951 datasheet(9/18 Pages) STMICROELECTRONICS

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L5951

Electrical specifications

EN switch input current

VBAT = 14V, EN  2 V

VBAT = 14V, EN  0.8 V

A

VENL, ENH EN input threshold voltage

VBAT = 14V, VIL

VBAT = 14V, VIH

0.8

VRES, L

Reset(1) output low voltage

Set VBAT so VREG2 drops 0.30 V

0.02

0.4

VRES

Reset(1) output voltage threshold

Decrease VBATso VREG2 drops

until Reset(1) drops

VREG2

- 0.20

VRES, HYS Reset threshold hysteresis

3.3V/100mA DC characteristics for regulator output 1

VREG1

Output voltage

IREG1 =100mA

3.14

3.3

3.46

Vline

Line regulation

7 V

 VBAT  26 V

(Measure

VREG1 Across VBAT

Range)

715

Vload

Load regulation

0.5mA

 IREG1  100mA

(Measure

VREG1 across VLOAD

range)

850

VDROPOUT

Dropout voltage (Measure VBAT -

VREG1 when VREG1 drops 0.1V)

IREG1 = 100mA

IREG1 = 5mA

0.12

2.2

1.5

Ilim1

Current limit

200

SVR1

Reg1 supply voltage rejection

IREG1 = IREG2 = IREG3 = 50mA

f = 20 to 20kHz

VBAT = 14Vdc, 1Vac,pp

5V/100mA regulator output 2

VREG2

Output voltage

IREG2 =100mA

4.75

5.25

Vline

Line regulation

 VBAT  26V

(Measure

VREG2 across VBAT

range)

640

Vload

Load regulation

0.5mA

 IREG2  100mA

(Measure

VREG2 across VLOAD

range)

100

VDROPOUT

Dropout voltage (Measure VBAT -

VREG2 when VREG2 drops 0.1V)

IREG2 =100mA

IREG2 =5mA

450

Ilim2

Current limit

200

SVR2

Reg2 supply voltage rejection

IREG1 = IREG2 = IREG3 = 50mA

f = 20 to 20kHz

VBAT = 14Vdc, 1Vac,pp

Table 6. Electrical characteristics (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Obsolete

Product(s)

- Obsolete

Product(s)

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