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AX3022 Datasheet Preview

AX3022 Datasheet

1.5A PWM Buck DC/DC Converter

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AX3022
200KHz, 1.5A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The AX3022 series are monolithic IC designed for a step-down DC/DC converter, and
own the ability of driving a 1.5A load without additional transistor. It saves board space. The
external shutdown function can be controlled by logic level and then come into standby
mode. The internal compensation makes feedback control having good line and load
regulation without external design. Regarding protected function, thermal shutdown is to
prevent over temperature operating from damage, and current limit is against over current
operating of the output switch. If current limit function occurs and VFB is down below 0.5V,
the switching frequency will be reduced. The AX3022 series operates at a switching
frequency of 200KHz thus allow smaller sized filter components than what would be
needed with lower frequency switching regulators. Other features include a guaranteed
+3% tolerance on output voltage under specified input voltage and output load conditions,
The chips are available in a standard SOT89-5L package.
FEATURES
- Output voltage: adjustable output version.
- Adjustable version output voltage range: 0.75V to 22V+3%.
- 200KHz fixed switching frequency.
- Voltage mode non-synchronous PWM control.
- Thermal-shutdown and current-limit protection.
- ON/OFF shutdown control input.
- Short Circuit Protect (SCP).
- Operating voltage can be up to 24V.
- Output load current: 1.5A.
- SOT89-5L Pb-Free packages.
- Low power standby mode.
- Built-in switching transistor on chip.
1/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.4 Oct.11, 2011




AXElite

AX3022 Datasheet Preview

AX3022 Datasheet

1.5A PWM Buck DC/DC Converter

No Preview Available !

AX3022
BLOCK DIAGRAM
EN
200mV
CURRENT
SOURCE
BIAS
0.75V
REFERENCE
2.5V
REGULATOR
START
UP
220mV
200KHz
OSC.
+
COMP_.
Current
limit
COMP.
+
+
FB _AMP
+
COMP.
CONTROL
+
COMP.
DRIVER
Thermal
Shutdown
V CC
SW
Vss
PIN ASSIGNMENT
The package of AX3022 is SOT89-5L; the pin assignment is given by:
VCC (Top View)
5
EN
4
AX3022
Name
VCC
SW
FB
Description
Operating voltage input
Switching output
Output voltage feedback control
123
SW
VSS
FB
SOT89-5L
EN ON/OFF Shutdown
VSS GND pin
ORDER/MARKING INFORMATION
Order Information
AX3022 XX X
Package Type
F5: SOT89-5L
Packing
Blank : Tube
A : Taping
Top Marking
30 22
YWX
Part number
ID code: internal
WW: 01~26 (A~Z)
27~52 (a~z)
Year: A=2010
1=2011
2/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.4 Oct.11, 2011


Part Number AX3022
Description 1.5A PWM Buck DC/DC Converter
Maker AXElite
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AX3022 Datasheet PDF





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