L4948 datasheet(3/9 Pages) STMICROELECTRONICS

Part #	L4948

Description	QUAD VOLTAGE REGULATOR WITH INHIBIT AND RESET

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ELECTRICAL CHARACTERISTICS (VS = 10.5 to 16V; IO1 = 6mA, IO2 = 8mA, IO3 = 4mA; IO4 = 0.4mA;

CO =10

µF max; Tamb = -40 to 85°C, unless otherwise specified.)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VO1

Output Voltage

IO1 = 300mA; Tamb =25

°C;

11V < VS < 16V all temps

9.7

9.5

10

10.3

10.5

V

∆VO1

Load Regulation

IO1 = 6 to 300mA

150

mV

IQ

Quiescent Current (

∆IS)VS = 14V; IO1 = 6mA;

VS =14V ; IO1 = 300mA;

10

30

mA

VS-VO1

Dropout Voltage

IO1 = 300mA

Tamb =25

°C;

all temps

400

600

mV

ΙL

Current Limit (Foldback) note1

VO1 = 0V

360

800

mA

VO1

Max Bat.Trans.

RO = 100

Ω

Ramp VS from 14 to 60V in 3-5ms

11

V

Hold VS at 60V for 10ms

Ramp VS from60 to 14V in 3-5ms;

Tamb =25

°C;

all temps

9.7

9.5

10

2

10.3

10.5

V

VO1

Rev. Voltage Trans.

VS = -35V; t

≤ 1ms; RO = 100Ω

Check VO1,Tamb =25

°C;

all temps

9.7

9.5

10

10.3

10.5

V

VO1

Rev. Voltage .

VS = -15V; RO = 100

Ω

-0.4

1

V

Ripple rejection

fO =1KHz; 1VppAC ; VS =14V

IO1 = 180mA; IO2 = 200mA;

IO3 = 400mA; IO4 = 40mA;

50

dB

fO =10KHz; 1VppAC ; VS =14V

IO1 = 180mA; IO2 = 200mA;

IO3 = 400mA; IO4 = 40mA;

50

dB

∆VO1

Line Regulation

∆VO1 across VS range

VS = 11V to 26V

50

mV

Output Noise

Check Output for AC noise

using a 100KHz LP filter

Check Output for AC noise

using an A weighted filter (20-

20KHz)

400

200

µV

VO2

Output Voltage

IO2 = 400mA; Tamb =25

°C;

all temps

7.75

7.60

8

8.25

8.40

V

∆VO2

Load Regulation

IO2 = 8 to 400mA

150

mV

∆IQ

Quiescent Current (

∆IS)VS = 14V; IO2 = 8mA;

VS = 14V; IO2 = 400mA;

10

35

mA

VS-VO2

Dropout Voltage

IO2 = 400mA

set VS =VO2+1V; Tamb =25

°C;

set VS =VO2+1.5V;all temps

400

600

mV

ΙL

Current Limit (Foldback) note1

VO2 = 0V

480

960

mA

VO2

Max Bat.Trans.

RO = 100

Ω

Ramp VS from 14 to 60V in 3-5ms

9

V

Hold VS at 60V for 10ms

Ramp VS from60 to 14V in 3-5ms;

Tamb =25

°C;

all temps

7.75

7.60

8

2

8.25

8.40

V

L4948

3/9

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