General Description

The MAX8830 light management IC integrates a 400mA (guaranteed) PWM DC-DC step-up converter, a 320mA white LED camera flash current sink, and four programmable LED current sinks. The internal 1MHz step-up converter features an internal switching MOSFET and synchronous rectifier to improve efficiency and minimize external component count. The camera flash output current and maximum timer is programmable through I2C. Each LED current is individually regulated to a programmable level (from off to 10mA in 32 steps) and is completely independent of each other.

Features

♦ Step-Up DC-DC Converter

   400mA Guaranteed Output Current

   Over 90 Efficiency

   On-Chip FET and Synchronous Rectifier

   Fixed 1MHz PWM Switching

   Small 2.2µH to 10µH Inductor

   I2C-Programmable VOUT (3.8V to 5.2V and Off in

      16 Steps)

♦ Flash LED Current Sink

   I2C-Programmable Flash Output Current (Off to

      320mA in 32 Steps)

   I2C-Programmable Flash Maximum Timer (0.5s,

      1.0s, 1.5s, or 2.0s)

   I2C-Programmable Movie Output Current (Off to

      160mA in 16 Steps)

   Movie Enabled by I2C or Logic Input

   Flash Enabled by Logic Input

   Low Dropout (75mV typ)

♦ Four LED Current Sinks

   Individually I2C-Programmable Output Current

      Off to 10mA in 32 Steps

   Low LED Sink Current Dropout Voltage (30mV typ)

♦ I2C Interface

   Write Address (0x94), Read Address (0x95)

   Individual On/Off and LED Current Settings

   Simple Register Mapping

♦ < 1µA Shutdown Current

♦ Open/Short LED Detection

♦ Thermal-Shutdown Protection

♦ 16-Bump, 2.5mm x 2.5mm UCSP Package

Applications

   Cell Phones and Smartphones

   PDAs and MP3 Players