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MB3821 - 2-ch DC/DC Converter

General Description

The MB3821 is a pulse width modulation (PWM) type 2-channel DC/DC converter IC with synchronous rectification designed for low voltage, high efficiency operation in high precision and high frequency applications, ideal for down conversion.

Key Features

  • Synchronous rectification.
  • High efficiency : 93 % (normal power mode, VIN = 6 V, load 1 A) : 84 % (low power mode, VIN = 6 V, load 20 mA).
  • Built-in power mode selector circuit Reference voltage accuracy : 2.5V ± 2 % Built-in error amp input control type soft start circuit Totem pole type output for N-ch MOSFET.

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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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FUJITSU SEMICONDUCTOR DATA SHEET DS04-27221-2E ASSP For Power Supply Applications With Power Mode Switching Function 2-ch DC/DC Converter IC With Synchronous Rectifier MB3821 s DESCRIPTION The MB3821 is a pulse width modulation (PWM) type 2-channel DC/DC converter IC with synchronous rectification designed for low voltage, high efficiency operation in high precision and high frequency applications, ideal for down conversion. A normal/low-power mode selection is provided, ideal for an internal power supply (3.3V, 5V) in applications with substantial load current variation, such as notebook computers.