2.2 mF

VLDO

LDO

200 mA

FB2

2.2 H

L2

10 mF

TPS 657051/52

Vout2

Vout3

PGND

AGND

ENLDO

EN2

FB1

L1

DCDC1

400 mA

10uF

Vout1

EN1

MODE

PGND

VINLDO

VIN2

VIN1

10 mF

VCC

2.25 MHz

Oscillator

DCDC2

400 mA

CLK0°

CLK180°

2.2 H

TPS657052

TPS657051

www.ti.com

SLVSA08 – FEBRUARY 2010

PMU for Embedded Camera Module

Check for Samples: TPS657052, TPS657051

1

FEATURES

•

Two 400mA Step-Down Converters

DESCRIPTION

•

Up to 92% Efficiency

TPS657051/52 are small power management units

•

targeted for embedded camera module or other

•

2.25 MHz Fixed Frequency Operation

portable low power consumer end equipments. It

contains two high efficient step down converters, a

•

Power Save Mode at Light Load Current

low dropout linear regulator and additional supporting

•

Output Voltage Accuracy in PWM Mode ±1.5%

functions. The 2.25MHz step-down converter enters a

•

100% Duty Cycle for Lowest Dropout

low power mode at light load for maximum efficiency

across the widest possible range of load currents. For

•

180° Out of Phase Operation

low noise applications the devices can be forced into

•

1 General Purpose 200mA LDO

fixed frequency PWM mode using the MODE pin. The

•

device allows the use of small inductors and

•

Available in a 16 Ball WCSP With 0.5mm Pitch

capacitors

to

achieve

a

small

sized

solution.

TPS657051/52 provides an output current of up to

400mA on both DCDC converters and integrates one

APPLICATIONS

200mA LDO with different output settings. The LDO

•

Digital Cameras

operates with an input voltage range between 1.7V

•

Portable Media Players

and 6.0V allowing it to be supplied from the output of

•

Handheld Equipment

the step-down converter or directly from the system

voltage.

The TPS657051/52 comes in a small 16-ball wafer

chip scale package (WCSP) with 0.5mm ball pitch.

Figure 1. Application 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 © 2010, 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.