Designed with the P6 and Pentium? in mind, the Intersil SynchroFET? family provides a new approach for implementing a synchronous rectified buck switching regulator. The SynchroFET replaces two power DMOSs, a Schottky diode, two gate drivers and synchronous control circuitry. The complementary drive circuit turns the upper FET on and the lower FET off when the input from the PWM is high. When the input from the PWM goes low the upper FET turns off and the lower FET turns on. The HIP5011 has a PWM pin that inverts the relationship from the input to PHASE. This architecture allows the designer to utilize a low cost single-ended PWM controller in either a current or voltage mode configuration. The SynchroFET operates in continuous conduction mode reducing EMI constraints and enabling high bandwidth operation.

特性 Features

? Complementary Drive, Half-Bridge Power NMOS

? Use With Low-Cost Single-Output PWM Controllers

? Improve Efficiency Over Conventional Buck Converter with Schottky Clamp

? Minimum Deadtime Provided by Adaptive Shoot-Through Protection Eliminates External Schottky

? Grounded Case for Low EMI and Simple Heatsinking

? Low Operating Current

? Frequency Exceeding 1MHz

? Dual Polarity Input Options

? All Pins Surge Protected

Applications

? 5V to ≤3.3V Synchronous Buck Converters

? Pentium and P6 Power Supplies

? PowerPC? Power Supplies

? Bus Terminations (BTL and GTL)

? Drive 5V Motors Directly from Microprocessor