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.