DESCRIPTION

The L4964 is a stepdown power switching regulator delivering4A at a voltage variable from 5.1V to 28V. Features of the device include overload protection, soft start, remote inhibit, thermal protection, a reset outputfor microprocessors and a PWM comparator input for synchronization in multichipconfigurations.

The L4964 is mounted in a 15-lead Multiwatt® plastic power package and requires very few external components.

Efficient operation at switching frequencies up to 120kHz allows a reductionin the size and cost of external filter components.

. 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 SYNCHRONUS PWM

. THERMAL SHUTDOWN