General Description

The MAX8834Y/MAX8834Z flash drivers integrate a 1.5A PWM DC-DC step-up converter and three programmable low-side, low-dropout LED current regulators. The step-up converter features an internal switching MOSFET and synchronous rectifier to improve efficiency and minimize external component count. An I2C interface provides flexible control of stepup converter output voltage setting, movie/flash mode selection, flash timer duration settings, and current regulator settings. The MAX8834Y/MAX8834Z operate down to 2.5V, making them future proof for new battery technologies.

Features

♦ 2.5V to 5.5V Operation Range

♦ Step-Up DC-DC Converter

    1.5A Guaranteed Output Current

    Adaptive or I2C Programmable Output Voltage

    2MHz and 4MHz Switching Frequency Options

♦ Two Flash/Movie LED Current Regulators

    I2C Programmable Flash and Movie Current

    Low-Dropout Voltage (110mV max) at 500mA

♦ LED Indicator Current Regulator

    I2C Programmable Output Current

    Ramp and Blink Timers for Indicator Mode

    Low-Dropout Voltage (130mV max) at 16mA

♦ I2C Programmable Safety and Watchdog Timers

♦ GSM Blank Logic Input

♦ MAXFLASH System Lockup Protection

♦ Remote Temperature Sensor Input

♦ Open/Short LED Detection

♦ Thermal Shutdown Protection

♦ < 1µA Shutdown Current

♦ 20-Bump, 0.5mm Pitch, 2.5mm x 2.0mm WLP

Applications

    Cell Phones and Smart Phones

    PDAs, Digital Cameras, and Camcorders