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廬

L5950

MULTIPLE MULTIFUNCTION

VOLTAGE REGULATOR FOR CAR RADIO

5 REGULATORS

10V (350mA); 8.5V (175mA); 5V (350mA); 5V

(250mA); 8V/10V (1A)

ALL REGULATORS ARE LOW DROPOUT

OUPUTS

3 HIGH SIDE DRIVERS:

2A (HSD1), 0.45A (HSD2 & HSD3)

NO EXTERNAL CHARGE PUMP CAPACI-

TORS ARE REQUIRED

STAND BY MODE CONTROLLED BY 3 IN-

PUT PINS:

ENABLE FOR REG2 AND REG3,

I

2

C BUS FOR REG1, REG4, REG5, HSD1,

HSD2, HSD3

INDIVIDUAL THERMAL SHUTDOWN

INDEPENDENT CURRENT LIMITING

SHORT CIRCUIT PROTECTION

LOAD DUMP PROTECTION AND OVERVOL-

TAGE SHUTDOWN

ESD PROTECTED

BLOCK DIAGRAM

BAT

GND

Multiwatt15

DESCRIPTION

The ASPM (Audio System Power Module) is an

integration of three high side drivers and five

regulators developed to provide the power for an

audio system.

The outputs of the IC are controlled via the I

2

C

bus and the Enable input.

External protection must be provided for reverse

battery protection.

REG 1

10V 350mA

REG1

VOLTAGE

REFERENCE

REG 2

8.5V 175mA

REG2

VREF

8.5 & 5V

ENABLE

REG 3

5V 350mA

REG3

ENABLE

SCL

PC OUTPUT

CONTROL

SDA

REG 4

8V/10V 1A

REG4

REG 5

5V 250mA

REG5

CURRENT

LIMIT

PROTECTION

LOGIC

INDIVIDUAL

THERMAL

SHUTDOWN

OVERVOLTAGE

PROTECTION

DRIVE 1

2A

HSD1

DRIVE 2

450mA

HSD2

DRIVE 3

450mA

HSD3

D99AU1002

March 2001

1/8

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