GENERAL DESCRIPTION

The ADP3419 is a dual MOSFET driver optimized for driving two N-channel switching MOSFETs in nonisolated synchronous buck power converters used to power CPUs in portable computers. The driver impedances have been chosen to provide optimum performance in multiphase regulators at up to 25 A per phase. The high-side driver can be bootstrapped relative to the switch node of the buck converter and is designed to accommodate the high voltage slew rate associated with floating high-side gate drivers.

FEATURES

All-in-one synchronous buck driver

One PWM signal generates both drives

Anticross-conduction protection circuitry

Output disable function

Crowbar control

Synchronous override control

Undervoltage lockout

APPLICATIONS

Mobile computing CPU core power converters

Multiphase desk-note CPU supplies

Single-supply synchronous buck converters

Nonsynchronous-to-synchronous drive conversion