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UC3555 - 500MA HIGH EFFICIENCY BOOST REGULATOR

Description

The UC3555 is a micropower step-up DC/DC in 8-lead TSSOP package.

It is designed for 2-cell battery powered systems such as digital cameras, cell phones and PDAs.

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

Features

  • S.
  • Low power PFM step-up DC/DC.
  • Low input voltage range from 1.6V to 4.5V.
  • Adjustable output voltage from 3V to 5V.
  • 500mA output current.
  • 95% peak Efficiency.
  • internal synchronous rectifier.
  • Low battery detection.
  • Current limited protection.
  • Current Anti-Drawback protection.

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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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UNISONIC TECHNOLOGIES CO., LTD UC3555 Advance 500MA HIGH EFFICIENCY BOOST REGULATOR WITH ADJUSTABLE OUTPUT, SHUTDOWN AND LOW BATTERY DETECT  DESCRIPTION The UC3555 is a micropower step-up DC/DC in 8-lead TSSOP package. It is designed for 2-cell battery powered systems such as digital cameras, cell phones and PDAs. The regulator starts-up at 1.3V and operates after the start at an input voltage as low as 1V. A Minimum off-time, variable on-time control scheme provides high efficiency over a wide range of load conditions. The combination of build-in power transistors, synchronous rectification, low battery detection and low supply current, make the UC3555 ideal for portable applications.  FEATURES * Low power PFM step-up DC/DC * Low input voltage range from 1.6V to 4.