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BL8542B - Synchronous Boost Converter

Description

The BL8542B is a step-up converter that provides a boosted output voltage from a low voltage source.

Because of its proprietary design, it starts up at a very low input voltage down to 850mV, making it an ideal choice for single cell alkaline/NiMH battery operations.

Features

  • Up to 95% Efficiency.
  • Output voltage accuracy 3％.
  • 1MHz Switching Frequency allows small inductor and output cap.
  • Input boost-strapping allows using small or no input cap.
  • Low Vin Start-up Voltage down to 850mV Ideal for Single Alkaline Cell operations.
  • Maximum Output Current up to 300mA.
  • Low Noise PWM control.
  • Internally Compensated Current Mode Control.

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Datasheet Details

Part number BL8542B
Manufacturer BELLING
File Size 466.31 KB
Description Synchronous Boost Converter
Datasheet download datasheet BL8542B Datasheet

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Full PDF Text Transcription

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BL8542B REV1.2, DEC 2010 0.85V startup, 1MHz, 300mA Iout, Synchronous Boost Converter DESCRIPTION The BL8542B is a step-up converter that provides a boosted output voltage from a low voltage source. Because of its proprietary design, it starts up at a very low input voltage down to 850mV, making it an ideal choice for single cell alkaline/NiMH battery operations. A switching frequency of 1MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count. BL8542B is housed in a tiny SOT23-5 and SOT89-3 Package.
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