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1 Features

1? Input Voltage Range: 4.5 V to 14 V

? 4-Bit Dynamic VID-On-The-Fly Support

? VID Programmable Output Voltage with

Programmable Transition Rate

? Fixed Switching Frequency of 520 kHz

? Selectable Low-Side (Three Settings) and Fixed

High-Side Thermally Compensated Overcurrent

Protection

? Power Good Indicator

? Internal 5-V Regulator

? Voltage Mode Control

? Internally Fixed 5.5-ms Soft-Start Time

? Prebias Output Safe

? Thermal Shutdown at 140°C

? 16-Pin QFN Package

2 Applications

? Smart-Reflex? DSPs

? POL Modules

? Telecom

3 Description

The TPS40197 is a synchronous buck controller that

operates from 4.5 V to 14 V input supply nominally.

The controller implements voltage-mode control

architecture with the switching frequency fixed at

520 kHz. The higher switching frequency facilitates

the use of smaller inductor and output capacitors,

thereby providing a compact power-supply solution.

An adaptive anti-cross conduction scheme is used to

prevent shoot through current in the power FETs.

The TPS40197 integrates the PWM control and 4-bit

VID interface in a single chip to allow seamless onthe-

fly VID changes with programmable transition

rate. It provides a simple power solution for Smart-

Reflex? DSP cores.