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FUJITSU SEMICONDUCTOR DATA SHEET
DS04-27218-4E
ASSP For Power Supply Applications
Pentium® II DC/DC Converter IC
MB3870
s DESCRIPTION
The FUJITSU MB3870 is a pulse width modulation (PWM) DC/DC converter IC chip that provides a selection of 1.3 V to 3.5 V output voltages for Pentium®* CPU’s, using a 5-bit input signal information. The MB3870 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 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.