ISL6613BEIB-T

The ISL6612B and ISL6613BEIB-T are high frequency MOSFETdrivers specifically designed to drive upper and lower powerN-Channel MOSFETs in a synchronous rectified buckconverter topology. These drivers combined with HIP63xx orISL65xx Multi-Phase Buck PWM controllers and N-ChannelMOSFETs form complete core-voltage regulator solutions foradvanced microprocessors.The ISL6612B drives the upper gate to above rising VCCPOR (7V), while the lower gate can be independently drivenover a range from 5V to 12V. The ISL6613BEIB-T drives bothupper and lower gates over a range of 5V to 12V. This drivevoltageprovides the flexibility necessary to optimizeapplications involving trade-offs between gate charge andconduction losses. These drivers are optimized for POLDC/DC Converters for IBA Systems.An advanced adaptive zero shoot-through protection isintegrated to prevent both the upper and lower MOSFETsfrom conducting simultaneously and to minimize the deadtime. These products add an overvoltage protection featureoperational before VCC exceeds its turn-on threshold, atwhich the PHASE node is connected to the gate of the lowside MOSFET (LGATE). The output voltage of the converteris then limited by the threshold of the low side MOSFET,which provides some protection to the microprocessor if theupper MOSFET(s) is shorted during initial start-up.These drivers also feature a three-state PWM input which,working together with Intersil’s multi-phase PWM controllers,prevents a negative transient on the output voltage when theoutput is shut down. This feature eliminates the Schottkydiode that is used in some systems for protecting the loadfrom reversed output voltage events.

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