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MB3821

Fujitsu Media Devices
Part Number MB3821
Manufacturer Fujitsu Media Devices
Description 2-ch DC/DC Converter
Published Sep 11, 2005
Detailed Description FUJITSU SEMICONDUCTOR DATA SHEET DS04-27221-2E ASSP For Power Supply Applications With Power Mode Switching Function ...
Datasheet PDF File MB3821 PDF File

MB3821
MB3821

Overview
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.
s 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 applications Built-in timer-latch type short protecti...


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