MB3871 データシートの表示（PDF） - Fujitsu

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MB3871

Mobile Pentium® II DC/DC Converter IC

Fujitsu 

FUJITSU SEMICONDUCTOR

DATA SHEET

DS04-27219-3E

ASSP For Power Supply Applications

Mobile Pentium® II DC/DC Converter IC

MB3871

s DESCRIPTION

The FUJITSU MB3871 is a pulse width modulation (PWM) DC/DC converter IC chip that provides a selection of

1.3 V to 2.0 V output voltages for Mobile Pentium® II* CPU’s, using a 4-bit input signal information.

The MB3871 utilizes synchronous rectification for high efficiency and features a soft-start/discharge control

function for ease in designing power supplies in multi-supply systems, making it ideal for Mobile Pentium® II power

supply systems.

* : Pentium is the registered trademark of Intel Corporation.

s FEATURES

• Highly efficient for using synchronous rectification scheme

• On-chip soft-start/discharge control circuit

• High precision output voltage: ±1.2%

• 4-bit, 16-step DAC: 2.0 V to 1.3 V in 50 mV steps

• Frequency range: 100 kHz to 500 kHz using variable resistance (on-chip frequency setting capacitance)

• Standby current: 0 µA TYP

• On-chip PWRGOOD circuit for output voltage state detection

• Timer-latch short-circuit protection circuit, and overvoltage protection circuit for output protection

s PACKAGE

24-pin Plastic SSOP

(FPT-24P-M03)

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