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FAN4855 - High Efficiency Boost Regulator

Description

The FAN4855 is a low power boost regulator designed for low voltage DC to DC conversion in 2-cell battery powered systems such as digital cameras, cell phones and PDAs.

The converter starts-up at 1.3V and operates after the start at an input voltage as low as 1V.

Features

  • Low power PFM boost regulator.
  • Input voltage range is from 1.6V to 4.5V.
  • Output voltage range is from 3V to 5V.
  • 500mA maximum load current capability.
  • 95% efficient power conversion.
  • 2-3 cell and single cell Li-Ion systems.
  • Variable on-time Pulse Frequency Modulation (PFM).
  • Internal synchronous rectifier (no need for external General.

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Datasheet preview – FAN4855

Datasheet Details

Part number FAN4855
Manufacturer Fairchild Semiconductor
File Size 552.77 KB
Description High Efficiency Boost Regulator
Datasheet download datasheet FAN4855 Datasheet
Additional preview pages of the FAN4855 datasheet.

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Full PDF Text Transcription

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www.DataSheet4U.com FAN4855 500mA High Efficiency Boost Regulator with Adjustable Output, Shutdown and Low Battery Detect December 2005 FAN4855 500mA High Efficiency Boost Regulator with Adjustable Output, Shutdown and Low Battery Detect Features ■ Low power PFM boost regulator ■ Input voltage range is from 1.6V to 4.5V ■ Output voltage range is from 3V to 5V ■ 500mA maximum load current capability ■ 95% efficient power conversion ■ 2-3 cell and single cell Li-Ion systems ■ Variable on-time Pulse Frequency Modulation (PFM) ■ Internal synchronous rectifier (no need for external General Description The FAN4855 is a low power boost regulator designed for low voltage DC to DC conversion in 2-cell battery powered systems such as digital cameras, cell phones and PDAs.
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