General Description

The AOZ2263BQI-15 is a high-efficiency, easy-to-use DC/

DC synchronous buck regulator that operates up to 28 V.

The device is capable of supplying 12 A of continuous output

current with an output voltage adjustable down to 0.8 V ±1.

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 on time can be externally

programmed up to 3.3 μS.

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 AOZ2263BQI-15 is available in a 4mm×4mm QFN-

22L package and is rated over a -40°C to +85°C ambient

temperature range.

特性 Features

? Wide input voltage range

- 10 V to 28V

? 12 A continuous output current

? Output voltage adjustable from 0.8 V ±1.0

? Low RDS(ON) internal NFETs

- 11 mΩ high-side

- 8 mΩ low-side

? Constant On-Time with input feed-forward

? Programmable on-time up to 3.3 μS

? Selectable PFM/PWM Mode

? Ceramic capacitor stable

? Adjustable soft start

? Ripple Reduction

? Power Good output

? Integrated bootstrap diode

? Cycle-by-cycle current limit

? Short-circuit protection

? Over voltage protection

? Thermal shutdown

? Thermally enhanced 22-pin 4mm × 4mm QFN

Applications

? Portable computers

? Compact desktop PCs

? Servers

? Graphics cards

? Set top boxes

? LCD TVs

? Cable modems

? Point of load dc/dc converters

? Telecom/Networking/Datacom equipment