FAN5109 Datasheet, PDF (1/13 Pages) Fairchild Semiconductor – Dual Bootstrapped 12V MOSFET Driver

October 2005
FAN5109
Dual Bootstrapped 12V MOSFET Driver
Features
■ Drives N-channel High-Side and Low-Side MOSFETs
in a Synchronous Buck Configuration
■ Enhanced Upgrade to FAN5009
■ Direct Interface to FAN5019B/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 for synchroni-
zation with PWM Controller
■ SOIC-8 Package
Applications
■ Multi-phase VRM/VRD Regulators for Microprocessor
Power
■ High Current/High Frequency DC/DC Converters
■ High Power Modular Supplies
General Description
The FAN5109 is a high-frequency driver, specifically
designed to drive N-Channel power MOSFETs in a syn-
chronous-rectified buck converter. This driver, combined
with a Fairchild Multi-Phase PWM controller and power
MOSFETs, form a complete core voltage regulator solu-
tion for advanced microprocessors.
The FAN5109 drives the upper and lower MOSFET gates
of a synchronous buck regulator up to 12V_GS. The
FAN5109’s output drivers can efficiently switch power
MOSFETs at frequencies above 500kHz. The circuit’s
adaptive shoot-through protection prevents the MOSFETs
from conducting simultaneously.
The FAN5109 is rated for operation from 0°C to +85°C
and is available in a low-cost SOIC-8 package.
Ordering Information
Part Number Temperature Range Pb-Free
FAN5109MX
0°C to 85°C
Yes
Note: Contact Fairchild Sales for availability of leaded parts.
Package
SOIC-8
Packing
Tape and Reel
Qty/Reel
2500
©2004 Fairchild Semiconductor Corporation
1
FAN5109 Rev. 1.0.4
www.fairchildsemi.com