Introduction

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1

Introduction

The TPS8125x device is an ideal power-supply solution for products powered by either a three-cell

alkaline, NiCd or NiMH battery, or a single-cell Li-Ion or Li-polymer battery. The wide input voltage range

is well-suited for portable power applications such as mobile phones or computer peripherals.

1.1

Requirements

The TPS8125xEVM is designed to produce a fixed output voltage over the full input voltage range. See

Table 1 for fixed output voltage version options. A DC power supply capable of delivering 2.50 V to 4.85 V

is required to operate this EVM. Please reference the device datasheet for the Recommended Operating

Conditions and Absolute Maximum Ratings.

1.2

Applications

•

USB Host Supplies from a Single Li-Ion Battery

•

USB Dedicated Charging Port Supply

•

Li-Ion Applications

•

Audio Applications

•

RF-PA Buffers

1.3

EVM Features

•

91% Efficiency at 4.5 MHz

•

V

•

0.85

μA Quiescent Current in Shutdown Mode

•

30

μA Quiescent Current in Normal Operation

•

V

1.4

EVM Ordering Options

Table 1 provides the ordering Information for the various EVM options.

Table 1. TPS8125x Output Voltage Options and Ordering Information

Orderable EVM Number

Device Part Number

Output Voltage

PWR121-001

TPS81256

5 V

2

TPS8125xEVM

SLVU653 – April 2012

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