2.2 F

m

VLDO1

LDO1

200mA

FB2

1.5 H

m

L2

DCDC2

400mA

TPS65708

Vout2

Vout3

FB1

1.5 H

m

L1

DCDC1

400mA

10 F

m

Vout1

VIN1

VIN2

PGND1

PGND2

VCC

MODE

VLDO2

LDO2

200mA

Vout4

V(USB)

PWM

ISINK

VINLDO1

VINLDO2

10 F

m

2.2 F

m

TPS65708

www.ti.com

SLVSAE1A

– OCTOBER 2010 – REVISED FEBRUARY 2011

PMU for Embedded Camera Module

Check for Samples: TPS65708

1

FEATURES

DESCRIPTION

•

Two 400mA Step-Down Converters

•

Up to 95% Efficiency

TPS65708 is a power management unit targeted for

embedded

camera

modules

or

other

portable

•

low-power consumer end equipment. It contains two

3.6V to 6V

high-efficiency step-down converters, two low-dropout

•

2.25MHz Fixed Frequency Operation

linear regulators, and a 7.5mA current sink for driving

•

Power Save Mode at Light Load Current

a LED. The 2.25MHz step-down converter enters a

low-power mode at light load for maximum efficiency

•

Output Voltage Accuracy in PWM mode

±1.5%

across the widest possible range of load currents. For

•

100% Duty Cycle for Lowest Dropout

low-noise applications, the devices can be forced into

•

180

° Out of Phase Operation

fixed frequency PWM mode using the MODE pin. The

device allows the use of small inductors and

•

2 General Purpose 200mA LDOs

capacitors

to

achieve

a

small

solution

size.

•

LDOs Optionally Powered From Step-Down

TPS65708 provides an output current of up to 400mA

Converters

on both DCDC converters and up to 200mA on each

•

7.5mA PWM Dimmable Current Sink

of the LDOs. The enable signal to the dcdc

converters and LDOs is generated internally by the

•

Available in a 16-Ball WCSP with 0.5mm Pitch

undervoltage lockout circuit.

APPLICATIONS

The TPS65708 comes in a small 16-ball wafer

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

•

Monitors

•

Laptops

•

Handheld Equipment

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.

© 2010–2011, 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.