AOZ2261NQI-12集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF中文资料

General Description

The AOZ2261NQI-12 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

0.6V ±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 2.6μs.

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 AOZ2261NQI-12 is available in a 4mm×4mm QFN-

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

temperature range.

特性 Features

 Wide input voltage range

– 2V to 28V

 8A continuous output current

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

 Low RDS(ON) internal NFETs

– 28m high-side

– 11m low-side

 Constant On-Time with input feed-forward

 Programmable on-time up to 2.6μs

 Selectable PFM light-load operation

 Ceramic capacitor stable

 Adjustable soft start

 Ripple reduction

 Discharge Function

 Power Good output

 Integrated bootstrap diode

 Adjustable 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