General Description

The AOZ2366QI is a high-efficiency, easy-to-use DC/DC

synchronous buck regulator that operates over a wide

4.5V to 28V voltage range.The device is capable of

supplying 20A of continuous output current with an

output voltage adjustable down to 0.6V (±1.0).

A proprietary constant on-time PWM control with input

feed-forward results in ultra-fast transient response while

maintaining relatively constant switching frequency over

the entire input voltage range. A low 80ns minimum ontime

enables very low output voltages at ultra-high

operating frequencies.

Integrated AC ripple injection enables all-ceramic low

ESR output filter capacitors and smaller PCB footprint

with no external components needed.

Selectable PFM mode optimizes light load efficiency

while forced PWM mode maintains constant frequency

for lower harmonic noise.

The device features multiple protection functions such as

VCC under-voltage lockout, cycle-by-cycle current limit,

output over-voltage protection, short-circuit protection,

and thermal shutdown.

The AOZ2366QI is available in a 5mm×5mm QFN_28L

package and is rated over a -40°C to +85°C ambient

temperature range.

Features

 Wide input voltage range

– 4.5V to 28V

 20A continuous output current

 Output voltage adjustable down to 0.6V (±1.0)

 Low RDS(ON) internal NFETs

– 5m high-side

– 1.6m low-side

 Constant On-Time with input feed-forward

 Programmable on-time up to 2.6μs and down to 80ns

 Programmable switching frequency range: 32kHz to

1MHz (for 12VIN to 1VOUT)

 Selectable PFM or forced PWM light load operation

 Ceramic capacitor stable

 Adjustable soft start

 Power Good output

 Integrated bootstrap diode

 Cycle-by-cycle current limit

 Short-circuit protection

 Thermal shutdown

 Thermally enhanced 5mm x 5mm QFN_28L package

Applications

 Compact PCs and gaming systems

 Set-top boxes and LCD TVs

 Server and storage systems

 Datacom and networking

 Embedded computing

 Point-of load DC/DC converters