The uP1991 is a dual, high voltage MOSFET driver optimized for driving two N-channel MOSFETs in a synchronousrectified 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 microprocessors. The uP1991 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 uP1991 is available in thermally enhanced WDFN2x2-8 package.

• Desktop CPU Core Voltage Regulators
• High Frequency Low Profile DC/DC Converter
• High Current Low Voltage DC/DC Converter