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AX3020 Datasheet Preview

AX3020 Datasheet

1.5A PWM Buck DC/DC Converter

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AX3020
200KHz, 1.5A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The AX3020 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 AX3020 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% tolerances on output voltage under
specified input voltage and output load conditions, the chips are available in a standard
8-lead SOP 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.
- SOP-8L Pb-Free packages.
- Low power standby mode.
- Built-in switching transistor on chip.
1/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Aug.04, 2010




AXElite

AX3020 Datasheet Preview

AX3020 Datasheet

1.5A PWM Buck DC/DC Converter

No Preview Available !

AX3020
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 AX3020 is SOP-8L; the pin assignment is given by:
VCC 1
SW 2
FB 3
EN 4
( Top View )
SOP-8L
8 VSS
7 VSS
6 VSS
5 VSS
Name
VCC
SW
FB
EN
VSS
Description
Operating voltage input
Switching output
Output voltage feedback control
ON/OFF Shutdown
HIGHON, LOWOFF
GND pin
ORDER/MARKING INFORMATION
Order Information
AX3020 X X
Package Type Packing
S: SOP-8L
Blank : Tube
A : Taping
Top Marking
Logo
AX 3 0 2 0
YYWWX
Part number
ID code:internal
WW: 01~52
Year: 10=2010
11=2011
2/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Aug.04, 2010


Part Number AX3020
Description 1.5A PWM Buck DC/DC Converter
Maker AXElite
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AX3020 Datasheet PDF





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