SI9912 - Vishay Siliconix

SI9912 Half-Bridge MOSFET Driver for Switching Power Supplies

The Si9912 is a dual MOSFET high-speed driver with break-before-make. It is designed to operate in high frequency dc-dc switchmode power supplies. The high-side driver is bootstrapped to handle the high voltage slew rate associated with “floating” high-side gate drivers. Each driver is capable of switching a 3000-pF load with 60-ns propogation delay and 25-n.

Features

D D D D D D D D D D 4.5- to 5.5-V Operation Undervoltage Lockout 250-kHz to 1-MHz Switching Frequency Shutdown Quiescent Current <5 mA One Input PWM Signal Generates Both Drive Bootstrapped High-Side Drive Operates from 4.5- to 30-V Supply TTL/CMOS Compatible Input Levels 1-A Peak Drive Current Break-Before-Make Circuit APPLICATIONS D D D D D Multiphase Desktop CPU Supplies Single-Supply Synchronous Buck Converters Mobile Computing CPU Core Power Converters Standard-Synchronous Converters High Frequency Switching Converters DESCRIPTION The Si9912 is a dual MOSFET high-speed driver with break.