General Description

The AOZ23655QI 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 18A 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 AOZ23655QI 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 18A

• 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 90A with 10ms on pulse

- Up to 120A with 10μs on pulse

- High efficiency ceramic capacitor stable

- 6.5mΩ high-side

- 3mΩ low-side

• Constant On-Time with input feed-forward

• Programmable frequency up to 2.6μs

• 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