• Operating Input Voltage 8 V to 40 V

• Input Voltage Feed-Forward Compensation

• < 1% Internal 0.7-V Reference

• Programmable Fixed-Frequency up to 1-MHz Voltage Mode Controller

• Internal Gate-Drive Outputs for High-Side and Synchronous N-Channel MOSFETs

• 16-Pin PowerPAD? Package (θJC = 2°C/W)

• Thermal Shutdown

• Externally Synchronizable

• Programmable High-Side Sense Short-Circuit Protection

• Programmable Closed-Loop Soft-Start

• TPS40054 Source Only

• TPS40055 Source and Sink

• TPS40057 Source and Sink With VO Prebias

The TPS4005x is a family of high-voltage, wide-input (8 V to 40 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 using an internal fault counter for longer duration overloads.