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MP3421 - Synchronous Step-Up Converter

Description

The MP3421 is a high-efficiency, synchronous, current

mode, step-up converter with true output disconnect.

The MP3421 starts up from low input voltage (as low as 1.9V) while providing in-rush current limiting and output short-circuit protection.

Features

  • Support 5V/2.1A Output at 2.8V Input.
  • Up to 98% Efficiency.
  • 1.9V to 5.5V Input Range.
  • 2.5V to 5.5V Output Range.
  • Internal Synchronous Rectifier.
  • 600kHz Fixed-Switching Frequency.
  • >5.5A Switch-Current Limit Capability.
  • 43uA Quiescent Current.
  • High-Efficiency over Full-Load Range.
  • Internal Soft-start and Compensation.
  • Output-Load Disconnect from Input.
  • OCP, SCP, OVP and OTP Protection.

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Full PDF Text Transcription

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The Future of Analog IC Technology MP3421 5.5A, 600kHz High-Efficiency, Synchronous Step-Up Converter with True Output Disconnect in a 2mmx2mm QFN Package DESCRIPTION The MP3421 is a high-efficiency, synchronous, current–mode, step-up converter with true output disconnect. The MP3421 starts up from low input voltage (as low as 1.9V) while providing in-rush current limiting and output short-circuit protection. The integrated, P-channel synchronous rectifier improves efficiency and eliminates the need for an external Schottky diode; the P-channel disconnects the output load from the input during shutdown. The MP3421 has 600kHz switching frequency, which accommodates small external components. In addition, its internal compensation and soft-start functions minimize external component count.
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