ADP3110

FEATURES All-in-one synchronous buck driver Bootstrapped high-side drive One PWM signal generates both drives Anticross-conduction protection circuitry Output disable control turns off both MOSFETs to float output per Intel® VRM 10 specification APPLICATIONS Multiphase desktop CPU supplies Single-supply synchronous buck converters Dual Bootstrapped, 12 V MOSFET Driver with Output Disable ADP3110 GENERAL DESCRIPTION The ADP3110 is a dual, high voltage MOSFET driver optimized for driving two N-channel MOSFETs, which are the two switches in a nonisolated synchronous buck power converter. Each of the drivers is capable of driving a 3000 pF load with a 25 ns propagation delay and a 30 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 ADP3110 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 ADP3110 is specified over the commercial temperature range of 0°C to 85°C and is available in an 8-lead SOIC_N package. SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM 12V ADP3110 IN 2 VCC 4 DELAY OD 3 CMP 1V DELAY CMP VCC 6 CONTROL LOGIC Figure 1. D1 BST 1 CBST1 DRVH 8 CBST2 RG Q1 SW 7 RBST TO INDUCTOR DRVL 5 PGND 6 Q2 05514-001 ©2010 SCILLC. All rights reserved. May 2010 – Rev. 2 Publicatio...