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.