General Description

The AOZ6663DI and AOZ6663DI-01 are high efficiency,

easy to use, 3A synchronous buck regulators at fixed

switching frequency for small form factor solution. Both

AOZ6663DI and AOZ6663DI-01 work from 4.5V to 18V

input voltage range, and provides up to 3A of continuous

output current with an output voltage adjustable down to

0.6V.

The AOZ6663DI features fixed frequency operation at

heavy load and Pulse Energy Mode (PEM) at light load,

providing best efficiency across whole load range.

The AOZ6663DI-01 features fixed frequency operation at

any load when output voltage is set to be lower than 4V.

This makes it a perfect fit for low noise audio application.

When output is set to be higher than 4V, Pulse Energy

Mode (PEM) is automatically enabled to achieve high

efficiency at standby light load. This allows flexible

solution to use a single product for multiple power rails

with different requirement.

Both AOZ6663DI and AOZ6663DI-01 come in a DFN

3mm x 3mm 8-lead package and is rated over a -40°C to

+85°C operating ambient temperature range.

Features

 4.5V to 18V operating input voltage range

 3A continuous output current

 Low on-resistance:

- 145mΩ high-side

- 80mΩ low-side

 Up to 95 efficiency

 AOZ6663DI light load mode:

- Pulse Energy Mode (PEM)

 AOZ6663DI-01 light load mode:

- Fixed frequency if VOUT < 4V

- Pulse Energy Mode (PEM) if VOUT > 4V

 87 light load efficiency at 10mA with PEM

 Minimum output voltage at 0.6V

 750kHz PWM operation

 Fixed internal soft start

 Capable to handle pre-bias start-up

 Cycle-by-cycle current limit

 Short-circuit protection

 Thermal shutdown

Applications

 High reliable DC/DC converters

 High performance LCD TV

 High performance cable modems