MB3821 データシートの表示（PDF） - Fujitsu

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MB3821

2-ch DC/DC Converter IC With Synchronous Rectifier

Fujitsu 

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 protection circuit

s PACKAGE

24-pin, Plastic SSOP

(FPT-24P-M03)

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