AOZ2261QI-18中文资料万国半导体数据手册PDF规格书

General Description

The AOZ2261QI-18 is a high-efficiency, easy-to-use DC/

DC synchronous buck regulator that operates up to 28V.

The device is capable of supplying 8A of continuous

output current with an output voltage adjustable down to

0.8V (±1.0).

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 1.3μs.

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 AOZ2261QI-18 is available in a 4mm x 4mm QFN-

23L package and is rated over a -40°C to +85°C ambient

temperature range.

特性 Features

 Wide input voltage range

– 2.7V to 28V

 8A continuous output current

 Output voltage adjustable down to 0.8V (±1.0)

 Low RDS(ON) internal NFETs

– 26m high-side

– 12m low-side

 Constant On-Time with input feed-forward

 Programmable on-time up to 1.3μs

 Selectable PFM light load operation

 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 4mm x 4mm QFN-23L package

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