General Description

The AOZ23645QI is a high-efficiency, easy-to-use DC/

DC synchronous buck regulators capable of operation

from a 4V to 28V input bus. The device is capable of

supplying 16A of continuous output current with an

output voltage adjustment from 0V to 1.8V by controlling

VID0 and VID1 signals.

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.

The devices feature 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 AOZ23645QI is available in a 5mm×5mm QFN-31L

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

temperature range.

Features

 Wide input voltage range:

– 4V to 28V

 Support Intel ITDC up to 16A

 Support Intel ICCMAX up to 45A

 2 bits programmable output voltage adjustable from 0V

to 1.8V

 Integrated high performance trench MOSFETs

capable of:

– High peak current

– Up to 45A with 10ms on pulse

– Up to 70A with 10μs on pulse

– High efficiency

– 11m high-side

– 4m low-side

 Constant On-Time with input feed-forward

 Selectable PFM light load operation

 Adjustable load-line compensation

 High accuracy current monitor

 Remote sense

 Ceramic capacitor stable

 Fixed soft start

 Power Good output

 Integrated bootstrap diode

 Cycle-by-cycle current limit

 Short-circuit protection

 Over-voltage protection

 Thermal shutdown

 Thermally enhanced 31-pin 5m×5m QFN

Applications

 Portable computers

 Compact desktop PCs

 Servers

 Networking equipment