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MAX8831 - High Efficiency White LED Step-Up Converter

General Description

The MAX8831 integrates a 60mA, 28V PWM DC-DC step-up converter with five low-dropout LED current regulators for display and keypad backlighting in cell phones, PDAs, and other portable devices.

The IC provides up to 90% efficiency over the entire input voltage range of 2.7V to 5.5V.

Key Features

  • open/short LED fault detection, output overvoltage protection, thermal shutdown, and open-circuit Schottky diode detection, with the status of each fault monitored continually for readback through the I2C interface. The MAX8831 is available in a tiny 2mm x 2mm, 16-bump WLP package. Features.
  • 28V Step-Up DC-DC Converter Integrated NMOS Power Switch > 90% Efficiency Fixed 2MHz Switching Pulse Skipping for Improved Light-Load Efficiency Tiny External Components.
  • I2C Programmable.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-4370; Rev 0; 11/08 www.DataSheet4U.com EVALUATION KIT AVAILABLE High-Efficiency, White LED Step-Up Converter with I2C Interface in 2mm x 2mm WLP General Description The MAX8831 integrates a 60mA, 28V PWM DC-DC step-up converter with five low-dropout LED current regulators for display and keypad backlighting in cell phones, PDAs, and other portable devices. The IC provides up to 90% efficiency over the entire input voltage range of 2.7V to 5.5V. The step-up converter operates at a fixed 2MHz switching frequency, enabling the use of very small external components to achieve a compact circuit area. For improved efficiency, the step-up converter automatically transitions to pulse-skipping mode at light loads.