aoz1240 Alpha & Omega Semiconductor, aoz1240 Datasheet - Page 2

• Manufacturer Part Number: aoz1240
• Description: Ezbucktm 2a Simple Buck Regulator
• Manufacturer: Alpha & Omega Semiconductor

Ordering Information
Pin Configuration
Pin Description
Pin Number
Rev. 1.3 September 2010
Part Number
AOZ1240AI
1
2
3
4
5
6
7
8
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Pin Name
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COMP
VBIAS
GND
BST
EN
V
LX
FB
IN
Ambient Temperature Range
PWM output connection to inductor. LX pin needs to be connected externally. Thermal connection
for output stage.
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 amplifier. 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 floating.
Supply voltage input. Range from 4.5V to 32V. When V
device starts up. All V
Compensation pin of internal linear regulator. Place a 1µF capacitor between this pin and ground.
Bootstrap voltage input. High side driver supply. Connected to 0.1µF capacitor between BST and
-40°C to +85°C
GND
BST
FB
LX
1
2
3
4
IN
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pins need to be connected externally.
(Top View)
SO-8
for additional information.
8
7
6
5
Package
Pin Function
VBIAS
VIN
EN
COMP
SO-8
IN
rises above the UVLO threshold the
IN
if not used. Do not leave the EN
Environmental
Green Product
AOZ1240
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