HIP6604

RECOMMEONBHD®SIEPOD6L6RE0ET1PEBDL,aPAHtRaCIPOES6DMh6U0eEC3eNBtTT PRODUCT HIP6601A, HIP6603A, HIP6604 August 2004 FN4884.5 Synchronous Rectified Buck MOSFET Drivers The HIP6601A, HIP6603A and HIP6604 are high frequency, dual MOSFET drivers specifically designed to drive two power N-Channel MOSFETs in a synchronous rectified buck converter topology. These drivers combined with a HIP63xx or an ISL65xx Multi-Phase Buck PWM controller form a complete core-voltage regulator solution for advanced microprocessors. The HIP6601A drives the lower gate in a synchronous rectifier to 12V, while the upper gate can be independently driven over a range from 5V to 12V. The HIP6603A drives both upper and lower gates over a range of 5V to 12V. This drive-voltage flexibility provides the advantage of optimizing applications involving trade-offs between switching losses and conduction losses. The HIP6604 can be configured as either a HIP6601A or a HIP6603A. The output drivers in the HIP6601A, HIP6603A and HIP6604 have the capacity to efficiently switch power MOSFETs at frequencies up to 2MHz. Each driver is capable of driving a 3000pF load with a 30ns propagation delay and 50ns transition time. These products implement bootstrapping on the upper gate with only an external capacitor required. This reduces implementation complexity and allows the use of higher performance, cost effective, N-Channel MOSFETs. Adaptive shoot-through protection is integrated to prevent both MOSFETs from conducting s...