Low

Current

LIMIT set

ILIM0

ILIM1

V

IN

L1

VIN

EN

ILIM0

GND

L2

VOUT

FB

L

1

1.5 µH

C

2

2.5 V to 5.5 V

V

OUT

3.3 V /500m A

TPS63051

SS

C

1

10µF

10µF

1M

R

2

C

3

PG

1nF

PFM/

PWM

ILIM1

High

High

High

High

Low

Low

Low

TPS63051

www.ti.com

SLVSAM8 – JULY 2013

SINGLE INDUCTOR BUCK-BOOST WITH 1A SWITCHES AND ADJUSTABLE SOFT START

Check for Samples: TPS63051

1

FEATURES

•

Tablet PCs

•

PC and Smart Phone Accessories

•

2.5V to 5.5V Input Voltage Range

•

USB Powered Applications

•

DESCRIPTION

•

Real Buck or Boost Operation for Highest

The TPS63051 is high efficiency, low quiescent

Efficiency

current buck-boost converter suitable for applications

•

Efficiency >90% in Boost Mode and >95% in

where the input voltage can be higher or lower than

Buck Mode

the output voltage . Output currents can go as high

•

Seamless Buck-Boost and PFM-PWM

as 500mA in boost mode and as high as 1A in buck

mode. The buck-boost converter is based on a fixed

transition with the lowest Output Voltage

frequency, pulse-width-modulation (PWM) controller

Ripple

using synchronous rectification to obtain maximum

•

2.5MHz Typical Switching Frequency

efficiency. At low load currents, the converter enters

•

Adjustable Average Input Current Limit

Power Save Mode to maintain high efficiency over a

wide load current range. The maximum average input

•

Adjustable Soft Start

current in the switches is limited to a typical value of

•

Device Quiescent Current Less Than 50

μA

1A. The converter can be disabled to minimize

•

Power Save Mode

battery

drain.

During

shutdown,

the

load

is

•

Load Disconnect During Shutdown

disconnected

from

the

battery.

The

device

is

packaged in a 12-pin WCSP package measuring

•

Over-Temperature Protection

1.6mm × 1.2mm.

•

Small 1.6mm x 1.2mm, 12-pin WCSP package

APPLICATIONS

•

Cellular Phones, Smart phones

Figure 1. Typical Circuit

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 © 2013, 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.