DESCRIPTION

The Si9913 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-ns transition time. The Si9913 comes with internal break-before-make feature to prevent shoot-through current in the external MOSFETs.

FEATURES

● 4.5- to 5.5-V Operation

● Undervoltage Lockout

● 250-kHz to 1-MHz Switching Frequency

● Synchronous Switch Enable

● 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

● Multiphase Desktop CPU Supplies

● Single-Supply Synchronous Buck Converters

● Mobile Computing CPU Core Power Converters

● Standard-Synchronous Converters

● High Frequency Switching Converters