FAN53418

www.fairchildsemi.com

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)

www.fairchildsemi.com

FAN53418
Synchronous DC-DC MOSFET Driver
Features
Drives N-channel High-Side and Low-Side MOSFETs in a synchronous buck configuration Internal Adaptive "Shoot-Through" Protection High Switching Frequency ( 500kHz) 30ns Output Rise/Fall Times w/3000pF load 20ns Propagation Delay 12V High-Side and 12V Low-Side Drive OD input for Output Disable allows for synchronization with PWM controller SOIC-8 Package

General Description
The FAN53418 is a high frequency, dual MOSFET driver specifically designed to drive two power N-Channel MOSFETs in a synchronous rectified buck converter. These drivers combined with a FAN53168 Multi-Phase Buck PWM controller and power MOSFETs form a complete core voltage regulator solution for advanced microprocessors. The FAN53418 drives both the upper and lower gates in a synchronous rectifier to 12V. The upper gate drive implements bootstrapping with only an external capacitor and diode required. This reduces implementation complexity and allows the use of higher performance, cost effective, N-Channel MOSFETs. The output drivers in the FAN53418 have the capacity to efficiently switch power MOSFETs at frequencies over 500kHz. Each driver is capable of driving a 3000pF load with a 20ns propagation delay and 30ns transition time. Adaptive shoot-through protection is integrated to prevent both MOSFETs from conducting simultaneously. Additionally an Output Disable function is included to synchronize the dr
iver with the PWM controller. The FAN53418 is rated for operation from 0 C to 85 C and is available in a low-cost SOIC-8 package.

Applications
Multi-phase VRM/VRD regulators for Microprocessor Power High Current/High Frequency DC/DC Converters High Power Modular Power Supplies

Basic Application
12V

C BST D1 Q1 1 BST DRVH 8 L1 2 IN FAN54318 3 OD PGND 6 Q2 4 C VCC VCC DRVL 5 SW 7 C VIN

Figure 1. Basic Application Circuit

REV. 1.0.0 6/11/03