FEATURES

Operating Input Voltage 10 V to 40 V

Output Voltage Tracks External Reference

Programmable Fixed-Frequency Up to

100 kHz to 1 MHz Voltage Mode Controller

Internal Gate Drive Outputs for High-Side

and Synchronous N-Channel MOSFETs

Externally Synchronizable

Programmable Short-Circuit Protection

Thermal Shutdown

16-Pin PowerPAD Package (θJC = 2°C/W)

Programmable Closed-Loop Soft-Start.

APPLICATIONS

DDR Tracking Regulators

Power Modules

Networking Equipment

Industrial Servers

CONTENTS

Device Ratings

Electrical Characteristics

Terminal Information

Application Information

Design Example

Additional References

DESCRIPTION

The TPS40056 is part of a family of high-voltage,

wide input, synchronous, step-down converters.

The TPS40056 offers design flexibility with a

variety of user programmable functions, including

soft-start, operating frequency, high-side current

limit, and loop compensation. The TPS40056 is

also synchronizable to an external supply. It

incorporates MOSFET gate drivers for external

N-channel high-side and synchronous rectifier

(SR) MOSFETs. Gate drive logic incorporates

anti-cross conduction circuitry to prevent

simultaneous high-side and synchronous rectifier

conduction. The externally programmable short

circuit protection provides pulse-by-pulse current

limit, as well as hiccup mode operation utilizing an

internal fault counter for longer duration

overloads.