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MAX8625A - Step-Up/Down DC-DC Converter

General Description

The MAX8625A PWM step-up/down regulator is intended to power digital logic, hard disk drives, motors, and other loads in portable, battery-powered devices such as PDAs, cell phones, digital still cameras (DSCs), and MP3 players.

Key Features

  • Four Internal MOSFET True H-Bridge Buck/Boost Glitch-Free, Buck-Boost Transitions Minimal Output Ripple Variation on Transitions Up to 92% Efficiency MAX8625A.
  • 37µA (typ) Quiescent Current in Skip Mode.
  • 2.5V to 5.5V Input Range.
  • Fixed 3.3V or Adjustable Output.
  • 1µA (max) Logic-Controlled Shutdown.
  • True Shutdown Output Overload Protection Internal Compensation Internal Soft-Start 1MHz Switc.

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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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19-1006; Rev 0; 3/08 High-Efficiency, Seamless Transition, Step-Up/Down DC-DC Converter General Description The MAX8625A PWM step-up/down regulator is intended to power digital logic, hard disk drives, motors, and other loads in portable, battery-powered devices such as PDAs, cell phones, digital still cameras (DSCs), and MP3 players. The MAX8625A provides either a fixed 3.3V or adjustable output voltage (1.25V to 4V) at up to 0.8A from a 2.5V to 5.5V input. The MAX8625A utilizes a 2A peak current limit. Maxim’s proprietary H-bridge topology* provides a seamless transition through all operating modes without the glitches commonly seen with other devices. Four internal MOSFETs (two switches and two synchronous rectifiers) with internal compensation minimize external www.DataSheet4U.