9

10

FB

VSEN

TPS53211

UDG-11173

11

12

FBG

CSN

4

3

BOOT

PHASE

2

LGATE

1

VCCDR

15

VCC

16

GND

8

COMP

7

EN

5

6

PGOOD UGATE

13

CSP

14

OSC

PVCC

Enable

Power

Good

TPS53211

www.ti.com

SLUSAA9

– SEPTEMBER 2011

Single-Phase PWM Controller with Light-Load Efficiency Optimization

1

FEATURES

APPLICATIONS

•

1.5-V to 19-V Conversion Voltage Range

•

Server and Desktop Computer Subsystem

Power Supplies

•

4.5-V to 14-V Supply Voltage Range

•

DDR Memory and Termination Supply

•

Voltage Mode Control

•

Distributed Power Supply

•

Skip Mode at Light Load for Efficiency

Optimization

•

General DC/DC Converter

•

High Precision 0.5% Internal 0.8-V Reference

DESCRIPTION

•

Adjustable Output Voltage from 0.8 V to

TPS53211 is a single phase PWM controller with

0.7

integrated high-current drivers. It is used for 1.5 V up

•

Internal Soft-Start

to 19 V conversion voltage.

•

Supports Pre-biased Startup

TPS53211

features

a

skip

mode

solution

that

•

Supports Soft-Stop

optimizes the efficiency at light load condition without

•

Programmable Switching Frequency from

compromising the output voltage ripple. The device

provides pre-biased startup, soft-stop, integrated

250 kHz to 1 MHz

bootstrap switch, power good function, EN/Input

•

Overcurrent Protection

UVLO protection. It supports conversion voltages up

•

Inductor DCR Sensing for Overcurrent

to 19 V, and output voltages adjustable from 0.8 V to

0.7

•

•

Overvoltage and Undervoltage Protection

The TPS53211 is available in the 3 mm

× 3 mm,

16-pin, QFN package (Green RoHs compliant and Pb

•

Open Drain Power Good Indication

free) and is specified from

–40°C to 85°C.

•

Internal Bootstrap Switch

•

Integrated High-Current Drivers Powered by

VCCDR

•

Small 3 mm x 3 mm, 16-Pin QFN Package

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.