Description
The FAN5109B is a dual, high-frequency MOSFET driver, specifically designed to drive N-channel power MOSFETs in a synchronous-rectified buck converter. These drivers, combined with a Fairchild multi-phase pulse-width-modulated (PWM) controller and power MOSFETs, form a complete core voltage regulator solution for advanced microprocessors.

Features
■ Drives N-Channel High-Side and Low-Side MOSFETs in a Synchronous Buck Configuration
■ Enhanced Upgrade to FAN5109
■ Direct Interface to FAN5029/FAN5182 and Other Compatible PWM Controllers
■ 12V High-Side and 12V Low-Side Drive
■ Internal Adaptive Shoot-Through Protection
■ Fast Rise and Fall Times
■ Switching Frequency Above 500kHz
■ OD Input for Output Disable – Allows Synchronization with PWM Controller
■ SOIC-8 Package
■ TTL-Compatible Logic Inputs (New)

Applications
■ Multi-Phase VRM/VRD Regulators for Microprocessor Power
■ High-Current, High-Frequency DC/DC Converters
■ High-Power Modular Supplies
■ General-Purpose TTL Input MOSFET Drivers