L4964HT Datasheet

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L4964

HIGH CURRENT SWITCHING REGULATOR

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4 A OUTPUT CURRENT

5.1 V TO 28 V OUTPUT VOLTAGE RANGE

0 TO 100 % DUTY CYCLE RANGE

PRECISE (卤 3 %) ON-CHIP REFERENCE

SWITCHING FREQUENCY UP TO 120 KHz

VERY HIGH EFFICIENCY (UP TO 90 %)

VERY FEW EXTERNAL COMPONENTS

SOFT START

RESET OUTPUT

CURRENT LIMITING

INPUT FOR REMOTE INHIBIT AND SYN-

CHRONUS PWM

THERMAL SHUTDOWN

MUL TIW AT T15 Vertical

(Plastic Package)

ORDERING NUMBER : L4964

DESCRIPTION

The L4964 is a stepdown power switching regulator

delivering 4A at a voltage variable from 5.1V to 28V.

Features of the device include overload protection,

soft start, remote inhibit, thermal protection, a reset

output for microprocessors and a PWM comparator

input for synchronization in multichip configurations.

The L4964 is mounted in a 15-lead Multiwatt庐 plas-

tic power package and requires very few external

components.

Efficient operation at switching frequencies up to

120kHz allows a reductionin the size and cost of ex-

ternal filter components.

PIN CONNECTION

(top view)

MULTIWATT15 Horizo ntal

(Plastic Package)

ORDERING NUMBER : L4964HT

Pins 1, 4, 15 must not be connected. Leave open circuit.

April 1993

1/13

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