General Description

  The AOZ1232-01 is a high-efficiency, easy-to-use DC/DC synchronous buck regulator that operates up to 28V. The device is capable of supplying 6A of continuous output current with an output voltage adjustable down to 0.8V (±1.0%).

  The AOZ1232-01 integrates an internal linear regulator to generate 5.3V VCC from input. If input voltage is lower than 5.3V, the linear regulator operates at low dropoutput 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 switching frequency can be externally programmed up to 1MHz.

  The device features multiple protection functions such as VCC under-voltage lockout, cycle-by-current limit, output over-voltage protection, short-circuit protection, as well as thermal shutdown. The AOZ1232-01 is available in a 5mm x 5mm QFN-30L package and is rated over a -40°C to +85°C ambient temperature range.

  The AOZ1232-01 is available in a 5mm x 5mm QFN-30L package and is rated over a -40°C to +85°C ambient temperature range.

Features

● Wide input voltage range

   – 2.7V to 28V

● 6A continuous output current

● Output voltage adjustable down to 0.8V (±1.0%)

● Low RDS(ON) internal NFETs

  – 35m high-side

  – 12m low-side SRFET™

● Constant On-Time with input feed-forward

● Programmable frequency up to 1MHz

● Internal 5.3V/20mA linear regulator

● Ceramic capacitor stable

● Adjustable soft start

● Power Good output

● Integrated bootstrap diode

● Cycle-by-cycle current limit

● Short-circuit protection

● Thermal shutdown

● Thermally enhanced 5mm x 5mm QFN-30L 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