Datasheet

Introduction

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1 Introduction

The TPS40192EVM-525 evaluation module (EVM) is a synchronous buck converter providing a fixed

1.8-V output at up to 10 A from a 12-V input bus. The EVM is designed to start up from a single supply;

so, no additional bias voltage is required for start-up. The module uses the TPS40192 reduced pin count,

mid-voltage, synchronous buck controller and TI's NexFET high performance MOSFETs.

1.1 Description

TPS40192EVM-525 is designed to use a regulated 12-V (8-V to 14-V) bus to produce a regulated 1.8-V

output at up to 10 A of load current. TPS40192EVM-525 is designed to demonstrate the TPS40192 in a

typical 12-V bus to low-voltage applications while providing a number of test points to evaluate the

performance of the TPS40192 in a given application. The EVM can be modified to support output voltages

from 0.9 V to 3.3 V by changing a single set resistor.

1.2 Applications

• Non-isolated, medium-current point of load and low-voltage bus converters

• Networking equipment

• Telecommunications equipment

• Computer peripherals

• Digital set-top box

1.3 Features

• 8-V to 14-V input range

• 1.8-V fixed output, adjustable with single resistor

• 10-Adc steady-state output current

• 600-kHz switching frequency (fixed by TPS40192)

• Single 5mm × 6mm TI NexFET for both main switch and synchronous rectifier

• Four-layer board with all components on the top side

• Convenient test points for probing switching waveforms and noninvasive loop-response testing

Using the TPS40192EVM-525, A 12-V Input, 1.8-V Output, 10-A Synchronous SLUU395–December 2009

Buck Converter

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