FUNCTIONAL DESCRIPTION

The L4952 is a monolithic voltage regulator with

an output voltage of typically 8.6V and a maxi-

mum output current of 150mA. It ’s a device for

audio applications in carradios.

The device contain a precision Bandgap refer-

ence, a output amplifier with overcurrent protec-

tion, two voltage switches, a driver for an external

pnp switch, a discharge circuitry for theft detec-

tion and a overtemperature protection.

For automatic PCB assembly

the package is

SO12+4+4. To use the maximal current of 150mA

a small copper area of 2cm

2

as heat sink on

board (Rth=60K/W) is necessary.

The device has a very low quiescent current in

standby mode. If the digital Input EN is Low the

device is switched off (stand by mode) and if EN

°C unless otherwise specified)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

no Load

1.6

5

mA

EN = 0V

0

20

µA

Low Voltage EN

-0.3

0.5

V

High Voltage EN

3.5

18

V

EN2, EN3, Low Voltage

-18

1.05

V

EN2, EN3, High Voltage

1.45

18

V

HSON Low Voltage

-18

1.0

V

HSON High Voltage

2.0

18

V

Current EN2, EN3, HSON

30

70

µA

Current EN2, EN3, HSON

-10

10

µA

Current High EN

-10

100

200

µA

Voltage Regulator (OUT 1)

Output voltage

no load

8.4

8.6

8.8

V

Dropout voltage

0.16

0.6

V

0.11

0.4

V

0.06

0.2

V

SVRR

Supply Voltage ripple rejection

f = 100Hz, C = 10

µF ESR = 5Ω

60

70

dB

Load regulation

30

60

mV

Current limits

150

300

800

mA

Voltage Regulator (OUT 4)

Output voltage

no load

9.5

10.0

10.5

V

Dropout voltage

0.14

0.3

V

0.075

0.15

V

SVRR

Supply Voltage ripple rejection

f = 100Hz C = 10

µF ESR = 5Ω

30

60

dB

Load regulation

0.5mA < I < 3 mA

100

mV

Current limits

8

60

mA

Diagnostic Output

Output Diagnostic Low voltage

Ω

0.4

V

Output voltage drop before

diagnostic activation

30

200

mV

Voltage Switches Vout2/3

0.25

0.5

V

0.125

0.25

V

0.25

0.5

V

0.14

0.28

V

High Side Switch Driver

Low Drop Voltage

0.26

0.8

V

Drop detection threshold

0.7

1

1.3

V

L4952

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