1FEATURES

23· 2.25-V to 5.5-V Input

· Output Voltage from 0.6 V to 90% of VIN

· High-Side Drive for N-Channel FET

· Supports Pre-Biased Outputs

· Adaptive Anti-Cross Conduction Gate Drive

· 1%, 0.6-V Reference

· Two Fixed Switching Frequency Versions,

TPS40040 (300 kHz) and TPS40041 (600 kHz)

· Three Selectable Short Circuit Protection

Levels of 105 mV, 180 mV and 310 mV

· Hiccup Restart from Faults

· Voltage Mode Control

· Active Low Enable

· Thermal Shutdown Protection at 145C

· 8-Pin, 3-mm x 3-mm SON with Ground

Connection to Thermal Pad

APPLICATIONS

· Point of Load

· Telecommunications

· DC to DC Modules

· Set Top Boxes

CONTENTS

Device Ratings 2

Electrical Characteristics 3

Device Information 8

Application Information 10

Design Examples 19

Additional References 32

DESCRIPTION

The TPS40040 and TPS40041 dc-to-dc controllers

are designed to operate from a 2.25-V to 5.5-V input

source. To reduce the number of external

components, several operating parameters are fixed

internally; namely, frequency, soft start time, and

short circuit protection (SCP) levels. For example, the

operating frequencies of TPS40040/1 are 300

kHz/600 kHz, respectively.