6V 3A step-down module with optional frequency synchronization, adjustable soft-start and tracking

TPSM8281x is a

family of pin-to-pin compatible, high-efficiency, and easy

to use synchronous step-down DC/DC power modules with

integrated inductors with output currents ranging from 1A up

to 4A. The devices use a fixed-frequency peak current-mode

control topology and support high power density requirements

for telecommunication, test and measurement, and medical

applications. Low resistance switches allow up to 4A

continuous output current at high ambient temperatures. The

switching frequency is adjustable from 1.8MHz to 4MHz and

can also be synchronized to an external clock. In PFM/PWM

mode, the TPSM8281x maintains high efficiency over the whole

load range. The devices provide 1% output voltage accuracy

in PWM mode, which eases designing precise power supplies.

The SS/TR pin can be used to limit inrush current through a

precise start-up ramp, or for sequencing by tracking the

output voltage to an external voltage applied to this

pin.