0

10

20

30

40

50

60

70

80

90

100

0.0001

0.001

0.01

0.1

1

I - Output Current - A

O

V = 5 V

I

V = 4.2 V

I

V = 3.8 V

I

V

= 3.3 V,

MODE = GND,

OUT

VIN

GND

EN

FB

SW

TPS62590DRV

MODE

L

2.2 H

m

C

OUT

10mF

C1

22pF

R1

R2

C

IN

10mF

PwrPAD

0.75 V to V

IN

V

I N

2.5 V to 5.5 V

5

4

2

1

3

6

Typical Application

TPS62590

www.ti.com

SLVS897B

– JANUARY 2009 – REVISED APRIL 2011

1-A Step Down Converter in 2 x 2 QFN Package

Check for Samples: TPS62590

1

FEATURES

DESCRIPTION

The

TPS62590

device

is

a

high

efficiency

2

•

Output Current up to 1000 mA

synchronous step down converter, optimized for

•

Input Voltage Range from 2.5 V to 5.5 V

battery powered portable applications. It provides up

•

Output Voltage Accuracy in PWM mode

±2.5%

to 1000-mA output current from batteries, such as

single Li-Ion or other common chemistry AA and AAA

•

Typ. 15-

μA Quiescent Current

cells.

•

100% Duty Cycle for Lowest Dropout

With an input voltage range of 2.5 V to 5.5 V, the

•

Available in a 2

× 2 × 0.8 mm QFN Package

device is targeted to power a large variety of portable

•

For Improved Features Set, See TPS62290

handheld equipment or POL applications.

The TPS62590 family operates at 2.25-MHz fixed

APPLICATIONS

switching frequency and enters a Power Save Mode

•

Portable Handheld

operation at light load currents to maintain a high

•

WLAN

efficiency over the entire load current range.

•

Low Power DSP Supply

The Power Save Mode is optimized for low output

voltage ripple. For low noise applications, the device

•

POL

can be forced into fixed frequency PWM mode by

pulling the MODE pin high. In the shutdown mode the

current consumption is reduced to less than 1

µA.

The TPS62590 allows the use of small inductors and

capacitors to achieve a small solution size.

The TPS62590 is available in a 2-mm

× 2-mm 6-pin

QFN package.

Empty para

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.

2

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2009–2011, 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.