1FEATURES

2· Operation Over 4.5-V to 28-V Input Range

· Fixed-Frequency Voltage-Mode Controller

· Integrated Unity Gain Amplifier for Remote

Output Sensing

· Predictive Gate Drive™ Generation II for

Improved Efficiency

· <1% Internal 700-mV Reference

· Input Voltage Feed Forward Control

· Prebiased Output Compatible

· Internal Gate Drive Outputs for High-Side and

Synchronous N-Channel MOSFETs

· Switching Frequency Programmable to 1 MHz

· 20-Pin QFN Package

· Thermal Shutdown Protection

· Software Design Tool and EVM Available

APPLICATIONS

· Power Modules

· Networking/Telecom

· Industrial

· Servers

CONTENTS

Device Ratings 2

Electrical Characteristics 4

Terminal Information 12

Application Information 15

Design Example 26

Additional References 40

DESCRIPTION

The TPS40075 is a mid voltage, wide input (4.5-V to

28-V), synchronous, step-down controller, offering

design flexibility for a variety of user programmable

functions, including; soft start, UVLO, operating

frequency, voltage feed-forward and high-side FET

sensed short circuit protection.

The TPS40075 drives external N-channel MOSFETs

using second generation Predictive Gate Drive to

minimize conduction in the body diode of the low side

FET and maximize efficiency. Pre-biased outputs are

supported by not allowing the low side FET to turn on

until the voltage commanded by the closed loop soft

start is greater than the pre-bias voltage. Voltage

feed forward provides good response to input transients and provides a constant PWM gain over a

wide input voltage operating range to ease

compensation requirements. Programmable short

circuit protection provides fault current limiting and

hiccup recovery to minimize power dissipation with a

shorted output. The 20-pin QFN package gives good

thermal performance and a compact footprint.