1

FEATURES

DESCRIPTION

APPLICATIONS

TYPICAL APPLICATION CIRCUIT

1

2

3

4

10

9

8

7

PGOOD

VOS

FB

COMP_EN

BOOT

SW

HDRV

LDRV_OC

TPS51113\TPS51163

5

6

VDD

GND

11

R6

C4

R4

R1

R3

C3

D1

VDD

C5

V

OUT

C2

R2

C1

Enable

R5

R

BIAS

R

OC

L1

V

IN

Q1

Q2

C6

C7

–

+

UDG-08105

V

OUT

TPS51113, TPS51163

SYNCHRONOUS BUCK CONTROLLER WITH HIGH-CURRENT GATE DRIVER

• Flexible Power Rails: 5 V to 12 V

The TPS51113 and TPS51163 are cost-optimized,

feature

rich,

single-channel

synchronous-buck

• Reference: 800 mV ± 0.8%

controllers that operates from a single 4.5-V to 13.2-V

• Voltage Mode Control

supply and can convert an input voltage as low as

• Support Pre-biased Startup

1.5 V.

• Programmable Overcurrent Protection with

The controller implements voltage mode control with

a

fixed

300-kHz

(TPS51113)

and

600-kHz

• Fixed 300-kHz (TPS51113) and 600-kHz

(TPS51163) switching frequency. The overcurrent

(TPS51163) Switching Frequency

sensing and has user-programmable threshold. The

• UV/OV Protections and Power Good Indicator

OC threshold is set by the resistor from LDRV_OC

• Internal Soft-start

pin to GND. The resistor value is read when the

• Integrated High-Current Drivers Powered by

over-current programming circuit applies 10

µA of

VDD

current to the LDRV_OC pin during the calibration

phase of the start-up sequence.

• 10-Pin 3 × 3 SON Package

The

TPS51113/TPS51163

also

supports

output

pre-biased startup.

• Server and Desktop Computer Subsystem

The strong gate drivers with low deadtime allow for

Power Supplies (MCH, IOCH, PCI, Termination)

the utilization of larger MOSFETs to achieve higher

• Distributed Power Supplies

efficiency. An adaptive anti-cross conduction scheme

is used to prevent shoot-through between the power

• General DC-DC Converters

FETs.

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 © 2009, 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.