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1FEATURES

2? High-Efficiency Boost Converter With

Programmable Output Voltage

? Two Individual Drivers for Serial Display

Backlight LEDs

? Three Drivers for Serial Keypad LEDs

? Automatic Dimming Controller

? Stand Alone Serial Leypad LEDs Controller

? Three General-Purpose IO Pins

? 25-Bump DSBGA Package: 2.54mm x 2.54mm

x 0.6mm

APPLICATIONS

? Cellular Phones and PDAs

? MP3 Players

? Digital Cameras

DESCRIPTION

LP3958 is a Lighting Management Unit for portable

applications. It is used to drive display backlight and

keypad LEDs. The device can drive 5 separately

connected strings of LEDs with high voltage boost

converter.

The keypad LED driver allows driving LEDs from high

voltage boost converter or separate supply

voltage.The MAIN and SUB outputs are high

resolution current mode drivers. Keypad LED outputs

can be used in switch mode and current mode.

External PWM control can be used for any selected

outputs.

The device is controlled through 2-wire low voltage I2C compatible interface that reduces the number of

required connections.

LP3958 is offered in a tiny 25-bump DSBGA

package.