AOZ2003 Datasheet, PDF (1/12 Pages) Alpha & Omega Semiconductors – 3A Ultra Low Dropout Linear Regulator

AOZ2003
3A Ultra Low Dropout Linear Regulator
General Description
The AOZ2003 is a 3A ultra low dropout linear regulator
designed for desktop motherboard, graphic card and
notebook applications. This device needs dual supplies,
a control voltage for the control circuitry and an input
voltage for power conversion. The AOZ2003 delivers
high-current and ultra low-drop output voltage for
applications where V_OUT is very close to V_IN.
The AOZ2003 features comprehensive control and
protection functions: a power on reset (POR) circuit for
monitoring both control and power inputs for proper
operation; an EN input for enabling or disabling the
device, a power OK with time delay for indicating the
output voltage status, a current limit function, and a
thermal shutdown function.
The AOZ2003 is available in exposed pad SO-8
package.
Features
 Ultra low dropout linear regulator
 1.35V~5.5V VIN supply voltage with external control
voltage
 Dropout voltage (typical):
180mV @ 2A
270mV @ 3A
 High accuracy output voltage +1.5%
 Enable and Power Good
 VOUT pull low resistance when disabled
 Current limiting protection
 Thermal shutdown protection
 Output voltage adjustable
 Small footprint exposed pad SO-8 Package
 Green product and RoHS compliant
Applications
 Desktop, notebook PCs
 Workstations
 Graphic cards
 Low voltage logic supplies
 Gaming
 SMPS post regulators
Typical Application
R3
5.1kΩ
POK
EN
C2
1μF
4
CNTL
1
POK
VIN ³
VOUT ⁶
AOZ2003
C3
10μF
C1
optional
2 _EN
GND
8
FB ⁷
R1
4kΩ
R2
12kΩ
5V
V_CNTL
1.8V
V_IN
1.072V
V_OUT
CO
22μF
Rev. 1.1 August 2012
www.aosmd.com
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