aoz1212 Alpha & Omega Semiconductor, aoz1212 Datasheet - Page 2

• Manufacturer Part Number: aoz1212
• Description: 3a Simple Buck Regulator
• Manufacturer: Alpha & Omega Semiconductor

Ordering Information
Pin Configuration
Pin Description
Pin Number
Rev. 1.1 October 2007
Part Number
AOZ1212AI
AOZ1212AI
1
2
3
4
5
6
7
8
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Pin Name
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COMP
VBIAS
GND
BST
EN
V
GND
LX
FB
BST
IN
Ambient Temperature Range
FB
LX
1
2
3
4
PWM output connection to inductor. LX pin needs to be connected externally. Thermal connection
for output stage.
Bootstrap voltage input. High side driver supply. Connected to 0.1µF capacitor between BST and
LX.
Ground.
Feedback input. It is regulated to 0.8V. The FB pin is used to determine the PWM output voltage
via a resistor divider between the output and GND.
External loop compensation. Output of internal error ampli er . Connect a series RC network to
GND for control loop compensation.
Enable pin. The enable pin is active HIGH. Connect EN pin to V
pin oating.
Supply voltage input. Range from 4.5V to 27V. When V
device starts up. All V
Compensation pin of internal linear regulator. Place put a 1µF capacitor between this pin and
ground.
-40°C to +85°C
-40°C to +85°C
(Top View)
SO-8
8
7
6
5
VBIAS
VIN
EN
COMP
IN
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pins need to be connected externally.
for additional information.
GND
BST
FB
LX
Package
Pin Function
SO-8
SO-8
1
2
3
4
(Top Thru View)
DFN-8
GND
VIN
IN
rises above the UVLO threshold the
8
7
6
5
IN
VBIAS
VIN
EN
COMP
if not used. Do not leave the EN
Environmental
RoHS
RoHS
AOZ1212
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