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RT8541A - Boost DC/DC Converter

This page provides the datasheet information for the RT8541A, a member of the RT8541 Boost DC/DC Converter family.

Datasheet Summary

Description

The RT8541/A is a constant frequency current mode PWM step-up DC/DC converter designed to bias avalanche photodiodes (APD) at high voltage in optical receivers.

It includes a voltage doubler charge pump to significantly reduce the noise level at output up to 90V.

Features

  • a built-in 9ms soft-start function to eliminate the inrush current during start-up interval. The RT8541/A provides a low cost optical receiver solution and can fit in very small PCB area. The RT8541/A is available in the WQFN-16L 3x3 package. Features.
  • Integrated Schottky Diodes for Charge Pump Voltage Doubler.
  • 50V, 400mA Internal Switch.
  • High Side Low Noise and Accurate APD Current Monitor.
  • 650kHz Fixed Switching Frequency for RT8541 and Adjustable Switching Frequency for R.

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Datasheet preview – RT8541A

Datasheet Details

Part number RT8541A
Manufacturer Richtek
File Size 151.59 KB
Description Boost DC/DC Converter
Datasheet download datasheet RT8541A Datasheet
Additional preview pages of the RT8541A datasheet.

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Full PDF Text Transcription

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® RT8541/A 90V Boost DC/DC Converter with APD Current Monitor General Description The RT8541/A is a constant frequency current mode PWM step-up DC/DC converter designed to bias avalanche photodiodes (APD) at high voltage in optical receivers. It includes a voltage doubler charge pump to significantly reduce the noise level at output up to 90V. The RT8541A switching frequency can be adjusted by a resistor while RT8541 is internally set at 650kHz. The RT8541/A has a built-in APD current mirror that delivers 1/5 of the APD current with high accuracy for monitoring the APD current from 0.25μA to 2.5mA. This current can be used as a reference to provide a digital programmed output voltage via the CTRL pin.
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