General Description

AOZ5506QI is a high efficiency synchronous buck power

stage module consisting of two asymmetrical MOSFETs

and an integrated driver. The MOSFETs are individually

optimized for operation in the synchronous buck

configuration. The High-Side MOSFET is optimized to

achieve low capacitance and gate charge for fast

switching with low duty cycle operation. The Low-Side

MOSFET has ultra-low ON resistance to minimize

conduction loss.

AOZ5506QI uses a PWM input for accurate control of the

power MOSFETs switching activities, is compatible with

5V (CMOS) logic and supports Tri-State PWM.

A number of features are provided making the

AOZ5506QI a highly versatile power module. The

bootstrap switch is integrated in the driver. The Low-Side

MOSFET can be driven into diode emulation mode to

provide asynchronous operation and improve light-load

performance. The pin-out is also optimized for low

parasitics, keeping their effects to a minimum.

Features

 4.5V to 25V power supply range

 4.5V to 5.5V driver supply range

 45A continuous output current

- Up to 65A with 20ms instantaneous current @ 14 V VIN

- Up to 60A with 20ms instantaneous current @ 22 V VIN

- Up to 80A with 10µs on pulse @ 22 V VIN

- Up to 90A with 10µs on pulse @14 V VIN

 Up to 2MHz switching operation

 5V PWM / Tri-State input compatible

 Under-voltage Lockout protection

 FCCM control for Diode Emulation / CCM operation

 Low profile 3.5mm x 4.5mm QFN-22L package

Applications

 Memory and graphics cards

 VRMs for motherboards

 Point of load DC/DC converters

 Video gaming consoles