AOZ1232QI-01 Datasheet, PDF (1/18 Pages) Alpha & Omega Semiconductors – 28V/6A Synchronous EZBuckTM Regulator

AOZ1232-01
28V/6A Synchronous EZBuck^TM Regulator
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 V_CC from input. If input voltage is lower
than 5.3V, the linear regulator operates at low drop-
output mode, which allows the V_CC 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
V_CC 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.
Features
 Wide input voltage range
– 2.7V to 28V
 6A continuous output current
 Output voltage adjustable down to 0.8V (±1.0%)
 Low R_DS(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
Rev. 1.3 October 2012
www.aosmd.com
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