AOZ1280CI Datasheet, PDF (1/13 Pages) Alpha & Omega Semiconductors – EZBuck™ 1.2 A Simple Buck Regulator

AOZ1280
EZBuck™ 1.2 A Simple Buck Regulator
General Description
The AOZ1280 is a high efficiency, simple to use, 1.2 A
buck regulator which is flexible enough to be optimized
for a variety of applications. The AOZ1280 operates from
a 3 V to 26 V input voltage range, and provides up to
1.2 A of continuous output current. The output voltage is
adjustable down to 0.8 V. The fixed 1.5 MHz PWM
switching frequency reduces inductor size.
The AOZ1280 comes in a SOT23-6L package and is
rated over a -40 °C to +85 °C operating ambient
temperature range.
Features
 3 V to 26 V operating input voltage range
 240 mΩ internal NMOS
 High efficiency: up to 95 %
 Internal compensation
 1.2 A continuous output current
 Fixed 1.5 MHz PWM operation
 Internal soft start
 Output voltage adjustable down to 0.8 V
 Cycle-by-cycle current limit
 Short-circuit protection
 Thermal shutdown
 Small size SOT23-6L
Applications
 Point of load DC/DC conversion
 Set top boxes
 DVD drives and HDD
 LCD Monitors & TVs
 Cable modems
 Telecom/Networking/Datacom equipment
Typical Application
VIN
C1
4.7µF
C3
VIN
EN
LX
AOZ1280
FB
GND
L1 2.2µH
VOUT
R1
C2
10µF
R2
Rev. 1.1 August 2011
Figure 1. 1.2 A Buck Regulator
www.aosmd.com
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