L4964 Ver la hoja de datos (PDF) - STMicroelectronics

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L4964

HIGH CURRENT SWITCHING REGULATOR

STMicroelectronics 

L4964

HIGH CURRENT SWITCHING REGULATOR

. 4 A OUTPUT CURRENT

. 5.1 V TO 28 V OUTPUT VOLTAGE RANGE

. 0 TO 100 % DUTY CYCLE RANGE

. PRECISE (± 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® 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 Horizontal

(Plastic Package)

ORDERING NUMBER : L4964HT

April 1993

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

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