aoz1242 Alpha & Omega Semiconductor, aoz1242 Datasheet - Page 2

• Manufacturer Part Number: aoz1242
• Description: Ezbucktm 3a Simple Buck Regulator
• Manufacturer: Alpha & Omega Semiconductor

Ordering Information
Pin Configuration
Pin Description
Pin Number
Rev. 1.4 November 2010
Part Number
AOZ1242AI
AOZ1242DI
1
2
3
4
5
6
7
8
AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.
Please visit
Pin Name
COMP
VBIAS
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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.
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
-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
DFN-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
Green Product
Green Product
AOZ1242
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