C

4.7

I

μF

C

10 uF

O

SW

VIN

EN

VOUT

BP

GND

L

1 μH

V

IN

2.65 V .. 4.85 V

V

OUT

5.0 V @ 700mA

TPS61256

0

10

20

30

40

50

60

70

80

90

100

.

I

- Output

Current

- mA

O

V - Input

Voltage

- V

I

V = 5.0 V

O

TPS61253, TPS61254, TPS61256, TPS61258

www.ti.com

SLVSAG8B – SEPTEMBER 2011 – REVISED MAY 2012

3.5-MHz HIGH EFFICIENCY STEP-UP CONVERTER IN CHIP SCALE PACKAGING

Check for Samples: TPS61253, TPS61254, TPS61256, TPS61258

1

FEATURES

DESCRIPTION

•

93% Efficiency at 3.5MHz Operation

The TPS6125x device provides a power supply

•

22µA Quiescent Current in Standby Mode

solution for battery-powered portable applications.

Intended for low-power applications, the TPS6125x

•

36µA Quiescent Current in Normal Operation

supports up to 800-mA load current from a battery

•

discharged as low as 2.65V and allows the use of low

•

cost chip inductor and capacitors.

•

With a wide input voltage range of 2.3V to 5.5V, the

•

device supports applications powered by Li-Ion

batteries with extended voltage range. Different fixed

•

voltage output versions are available from 3.15V to

•

±2% Total DC Voltage Accuracy

5.0V.

•

Light-Load PFM Mode

The TPS6125x operates at a regulated 3.5-MHz

•

Selectable Standby Mode or True Load

switching frequency and enters power-save mode

Disconnect During Shutdown

operation at light load currents to maintain high

•

Thermal Shutdown and Overload Protection

efficiency over the entire load current range. The

PFM mode extends the battery life by reducing the

•

Only Three Surface-Mount External

quiescent current to 36

μA (typ) during light load

Components Required

operation.

•

In addition, the TPS6125x device can also maintain

•

its output biased at the input voltage level. In this

mode, the synchronous rectifier is current limited

APPLICATIONS

allowing external load (e.g. audio amplifier) to be

•

Cell Phones, Smart-Phones

powered with a restricted supply. In this mode, the

quiescent current is reduced to 22µA. Input current in

•

Mono and Stereo APA Applications

shutdown mode is less than 1µA (typ), which

•

USB Charging Port (5V)

maximizes battery life.

The TPS6125x offers a very small solution size due

spacer

to minimum amount of external components. It allows

spacer

the use of small inductors and input capacitors to

achieve a small solution size. During shutdown, the

load is completely disconnected from the battery.

Figure 2. Smallest Solution Size Application

Figure 1. Efficiency vs. Load Current

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.

UNLESS

OTHERWISE

NOTED

this

document

contains

Copyright © 2011–2012, Texas Instruments Incorporated

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.