ADP3120A

www.DataSheet4U.com Dual Bootstrapped, 12 V MOSFET Driver with Output Disable ADP3120A FEATURES All-in-one synchronous buck driver Bootstrapped high-side drive One PWM signal generates both drives Anticross conduction protection circuitry OD for disabling the driver outputs Meets CPU VR requirement when used with Analog Devices Flex -Mode™ 1 controller GENERAL DESCRIPTION The ADP3120A is a dual, high voltage MOSFET driver optimized for driving two N-channel MOSFETs, the two switches in a nonisolated synchronous buck power converter. Each driver is capable of driving a 3000 pF load with a 45 ns propagation delay and a 25 ns transition time. One of the drivers can be bootstrapped and is designed to handle the high voltage slew rate associated with floating high-side gate drivers. The ADP3120A includes overlapping drive protection to prevent shoot-through current in the external MOSFETs. The OD pin shuts off both the high-side and the low-side MOSFETs to prevent rapid output capacitor discharge during system shutdown. The ADP3120A is specified over the commercial temperature range of 0°C to 85°C and is available in 8-lead SOIC_N and 8-lead LFCSP_VD packages. 1 APPLICATIONS Multiphase desktop CPU supplies Single-supply synchronous buck converters Flex-Mode is protected by U.S. Patent 6683441; other patents pending. FUNCTIONAL BLOCK DIAGRAM 12V VCC 4 D1 ADP3120A LATCH R1 R2 Q S DELAY BST 1 CBST2 CBST1 DRVH RG Q1 RBST SW IN 2 8 TO INDUCTOR 7 CMP VCC 6 CMP 1V CONTRO...