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MB3886

2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type

Fujitsu 

FUJITSU SEMICONDUCTOR

DATA SHEET

DS04-27228-2E

ASSP

For Power Supply Applications (General Purpose DC/DC Converter)

2-Channel DC/DC Converter IC

with Overcurrent Protection Symmetrical-Phase Type

MB3886

s DESCRIPTION

The MB3886 is a symmetrical-phase type of two-channel, DC/DC converter IC using pulse width modulation

(PWM) , incorporating an overcurrent protection circuit (requiring no current sense resistor) and an overvoltage

protection circuit. Providing high output driving capabilities, the MB3886 is suitable for down-conversion.

The MB3886 adopts both synchronous rectification to provide high efficiency and symmetrical phasing (two anti-

phase triangular waves) which contributes to making the input capacitor small.

The MB3886 contains a 5-volt regulator resulting in a reduced number of components used. It also contains a

variety of protection features which output the protection status upon detection of an overvoltage or overcurrent

while reducing the number of external protective devices required.

The result is an ideal built-in power supply for driving products with high speed CPU’s such as home TV game

devices and notebook PC’s.

This product is covered by US Patent Number 6,147,477.

s FEATURES

• Overcurrent protection circuit (requiring no current sense resistor) and overvoltage protection circuit

• Power-supply voltage range : 5.5 V to 18 V

• Synchronous rectification system providing high efficiency

• PSIG pins (open-drain) to output the protection status

s PACKAGE

(Continued)

30-pin plastic SSOP

(FPT-30P-M02)

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