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EZBuck™ 3A Simple Buck Regulator
April 2006

April 2006 www.aosmd.com Page 1 of 17

General Description
The AOZ1012D is a high efficiency, simple to use, 3A buck
regulator. The AOZ1012D works from a 4.5V to 16V input
voltage range, and provides up to 3A of continuous output
current with an output voltage adjustable down to 0.8V.

The AOZ1012D comes in 4X5 DFN-8 packages and is rated
over a -40°C to +85°C ambient temperature range.



Features
• 4.5V to 16V operating input voltage
range
• 50 m Ω internal PFET switch for high
efficiency: up to 95%
• Internal Schottky Diode
• Internal soft start
• Output voltage adjustable to 0.8V
• 3A continuous output current
• Fixed 500kHz PWM operation
• Cycle-by-cycle current limit
• Short-circuit protection
• Thermal shutdown
• Small size DFN-8 packages

Applications
• Point of load dc/dc conversion
• PCIe graphics cards
• Set top boxes
• DVD drives and HDD
• LCD panels
• Cable modems
• Telecom/Networking/Datacom
equipment


Typical Application

L1
C2
VOUT
AOZ1012D
C1
LX
VIN
FB
GND
COMP
EN
22uF
47uF
3.3uH
From uPC
RC
CC
R1
R2
+3.3V Output
@3A
VIN


Figure 1. 3.3V/3A Buck Down Regulator