FAN53418

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 driver with the...