General Description
The AOZ23645QI is a high-efficiency, easy-to-use DC/
DC synchronous buck regulators capable of operation
from a 4V to 28V input bus. The device is capable of
supplying 16A of continuous output current with an
output voltage adjustment from 0V to 1.8V by controlling
VID0 and VID1 signals.
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 devices feature 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 AOZ23645QI is available in a 5mm×5mm QFN-31L
package and is rated over a -40°C to +85°C ambient
temperature range.

Features
 Wide input voltage range:
– 4V to 28V
 Support Intel ITDC up to 16A
 Support Intel ICCMAX up to 45A
 2 bits programmable output voltage adjustable from 0V
to 1.8V
 Integrated high performance trench MOSFETs
capable of:
– High peak current
– Up to 45A with 10ms on pulse
– Up to 70A with 10μs on pulse
– High efficiency
– 11m high-side
– 4m low-side
 Constant On-Time with input feed-forward
 Selectable PFM light load operation
 Adjustable load-line compensation
 High accuracy current monitor
 Remote sense
 Ceramic capacitor stable
 Fixed soft start
 Power Good output
 Integrated bootstrap diode
 Cycle-by-cycle current limit
 Short-circuit protection
 Over-voltage protection
 Thermal shutdown
 Thermally enhanced 31-pin 5m×5m QFN

Applications
 Portable computers
 Compact desktop PCs
 Servers
 Networking equipment