General Description

The AOZ2153LQI-30 is a high-efficiency, easy-to-use

DC/DC synchronous buck regulator that operates up to 28 V.

The device is capable of supplying 8 A of continuous output

current with an output voltage adjustable down to 0.6 V ±1.

The AOZ2153LQI-30 integrates an internal linear regulator

to generate 5.3 V VCC from input. If input voltage is lower

than 5.3 V, the linear regulator operates at low drop output

mode, which allows the VCC voltage is equal to input voltage

minus the drop-output voltage of the 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 AOZ2153LQI-30 is available in a 3 mm × 3 mm QFN-

18L package and is rated over a -40°C to +85°C ambient

temperature range.

Features

• Wide input voltage range

- 6.5 V to 28 V

• 8 A continuous output current

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

• Low RDS(ON) internal NFETs

- 11 mΩ high-side

- 11 mΩ 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 3 mm x 3 mm QFN-18L package

Applications

• Compact desktop PCs

• Graphics cards

• Set-top boxes

• LCD TVs

• Cable modems

• Point-of-load DC/DC converters

• Telecom/Networking/Datacom equipment