TPS40054,TPS40055,TPS40057,pdf

The TPS4005x is a family of high-voltage, wide input (8 V to40 V), synchronous, step-down controllers. The TPS4005x family offers design flexibility with a variety of user-programmable funcTIons, including soft-start, UVLO, operaTIng frequency, voltage feed- forward, high-side current limit, and loop compensaTIon.

The TPS4005x uses voltage feed-forward control techniques to provide good line regulaTIon over the wide (4:1) input voltage range, and fast response to input line transients. Near-constant modulator gain with input variation eases loop compensation. The externally programmable current limit provides pulse-by-pulse current limit, as well as hiccup mode operation utilizing an internal fault counter for longer duration overloads.