General Description

The AOZ2223QI is a high-efficiency, easy-to-use

DC/DC synchronous buck regulator that operates up to 36V.

The device is capable of supplying 8A of continuous output

current with an output voltage adjustable from 0.8V to 16V.

The AOZ2223QI integrates an internal linear regulator to

generate 5.3V (±5) VCC from input power or external bias

power. If bias voltage is higher than 4.8V, the input voltage of

linear regulator switches to the bias for power saving. When

the input voltage of linear regulator is lower than 5.3V, the

linear regulator operates at low drop-output mode; the VCC

voltage is equal to input voltage minus the drop-output

voltage of internal linear regulator.

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 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 AOZ2223QI is available in a 4mm×4mm QFN-23L

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

temperature range.

Features

• Wide input voltage range

- 4.8V to 36V Connect BIAS to an external bias (>5V)

- 6.5V to 36V (Connect BIAS to VOUT if VOUT>5V)

• 8A continuous output current

• Output voltage adjustable from 0.8V to 16V.

• Low RDS(ON) internal NFETs

- 20mΩ high-side

- 10mΩ low-side

• Constant On-Time with input feed-forward

• Ceramic capacitor stable

• Adjustable soft start

• Integrated bootstrap diode

• Cycle-by-cycle current limit

• Short-circuit protection

• Thermal shutdown

• Thermally enhanced 4mm x 4mm QFN-23L package

Applications

• General-purpose wide VIN applications

• Industrial distributed power applications

• 12-V and 24-V Industrial and communications power

systems

• USB dedicated charging ports and battery chargers

• Industrial automation and motor control

• Point of load dc/dc converters

• USB type-C

• Test and measurement