The uP1991S is a dual, high voltage MOSFET driver optimized for driving two N-channel MOSFETs in a synchronous-rectified buck converter. Each driver is capable of driving a 5000pF capacitive load with 30ns transition time. This device combined with uPI multi-phase buck PWM controller forms a complete core voltage regulator for advanced micro-processors. The uP1991S features anti-shoot-through protection that prevents cross-conduction of the external MOSFET while maintains minimum deadtime for optimized efficiency. This part has integrated bootstrap switch to help minimize the external component count. Both gate drives are turned off by pulling low EN pin or high-impedance at PWM pin, preventing rapid output capacitor discharge during system shutdown.

This device also supports supply input under voltage lockout. The uP1991S is available in thermally enhanced WDFN3x3-8L package.

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