LM2758

PGND

SGND

EN1

EN2

2.2 PF

C1

+

C2

+

C2

-

C1

-

1 PF

1 PF

2.2 PF

LED-

+

-

2.7V to 5.5V

C2

C1

LM2758

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SNVS551D – APRIL 2008 – REVISED MAY 2013

LM2758 Switched Capacitor Flash LED Driver in DSBGA

Check for Samples: LM2758

1

FEATURES

APPLICATIONS

2

•

Up to 700 mA Output Current

•

Camera Flash in Mobile Phones

•

Ultra-Small Solution Size

•

Flash for Digital Cameras

–

No Inductor, Only 4 Capacitors and a

DESCRIPTION

Resistor Required

LM2758 is an integrated low-noise, high-current

–

1.514 mm x 1.996 mm x 0.6 mm Thin

switched capacitor DC/DC converter with a regulated

DSBGA package

current sink. The device is capable of driving loads up

•

90% Peak Efficiency

to 700 mA from a single-cell Li-Ion battery. Maximum

efficiency is achieved over the input voltage range by

•

Indicator, Torch and Flash Modes

actively selecting the proper gain based on the LED

•

Time-Out Circuitry Limits Flash Duration to

forward voltage and current requirements.

814 msec. (typ.)

One external low-power resistor sets the desired

•

Adaptive 1x and 1.5x Gains for Maximum

current for Indicator, Torch and Flash modes. To

Efficiency

protect the devices and the flash LED, internal Time-

•

True Shutdown

out circuitry turns off the LM2758 in case of a faulty

•

Internal Soft-Start Eliminates Inrush Current

prolonged Flash mode. Internal soft-start circuitry

limits the amount of inrush current during start-up.

LM2758 is offered in a tiny 12-bump thin DSBGA

package.

Typical Application Circuit

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2013, 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.