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AD4021 - 2A 150kHz 40V Buck DC/DC Converter

General Description

The AD4021 is a 150KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 2A load with high efficiency, low ripple and excellent line and load regulation.

Key Features

  • Wide 4.5V to 40V Input Voltage Range.
  • Output Adjustable from 1.235V to 37V.
  • Minimum Drop Out 1.5V.
  • Fixed 150kHz Switching Frequency.
  • 2A Constant Output Current Capability.
  • Internal Optimize Power Transistor.
  • Excellent line and load regulation.
  • TTL shutdown capability.
  • ON/OFF pin with hysteresis function.
  • With output constant current loop.
  • Built in thermal shutdown function.
  • Built in current limit function.
  • Built in output over vol.

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Datasheet Details

Part number AD4021
Manufacturer ADV
File Size 250.30 KB
Description 2A 150kHz 40V Buck DC/DC Converter
Datasheet download datasheet AD4021 Datasheet

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Full PDF Text Transcription (Reference)

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ADV AD4021 2A 150kHz 40V Buck DC/DC Converter With Constant Current Loop General Description The AD4021 is a 150KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 2A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator. The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function is built inside. An internal compensation block is built in to minimize external component count. Features ◆ Wide 4.5V to 40V Input Voltage Range ◆ Output Adjustable from 1.235V to 37V ◆ Minimum Drop Out 1.