LED Light Management IC in 2.5mm x 2.5mm UCSP

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.

An I²C interface controls individual on/off of all outputs, step-up output voltage setting, movie/flash current, flash timer duration settings, and individual LED current sink settings.

The MAX8830 is available in a 16-bump UCSP™ package (2.5mm x 2.5mm).

Applications

* Cell Phones and Smartphones * PDAs and MP3 Players

* 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