General Description
The AOZ5311NQI 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.
The AOZ5311NQI uses a PWM input for accurate control
of the power MOSFETs switching activities, is compatible
with 3V and 5V (CMOS) logic and supports Tri-State
PWM.
A number of features are provided making the
AOZ5311NQI 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
 2.5V to 20V power supply range
 4.5V to 5.5V driver supply range
 55A continuous output current
- Up to 80A for 10ms on pulse
- Up to 120A for 10us on pulse
 Up to 2MHz switching operation
 3V / 5V PWM / Tri-State input compatible
 Under-Voltage lockout protection
 SMOD# control for Diode Emulation / CCM operation
 < 1mV detection threshold for efficient ZCD control
 Low profile 5x5 QFN-31L package

Applications
 Memory and graphic cards
 VRMs for motherboards
 Point of load DC/DC converters
 Video gaming console