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AX3023 Datasheet Preview

AX3023 Datasheet

1A PWM Buck DC/DC Converter

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AX3023
200KHz, 1A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The AX3023 series are monolithic IC designed for a step-down DC/DC converter, and
own the ability of driving a 1A 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 the AX3023s VFB is down below 0.5V, the switching
frequency will be reduced. The AX3023 operates at a switching frequency of 200KHz thus
allow smaller sized filter components. Other features include a guaranteed +3% tolerance
on output voltage under specified input voltage and output load conditions, The chips are
available in SOT-23-5L and SOP-8L packages.
FEATURES
- Output voltage: adjustable output version.
- Adjustable version output voltage range: 0.745V to 22V±3%.
- Fixed switching frequency is 200KHz
- 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: 1A.
- SOT-23-5L and SOP-8L packages.
- Low power standby mode.
- Built-in switching transistor on chip.
1/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.5 Jun.28, 2010




AXElite

AX3023 Datasheet Preview

AX3023 Datasheet

1A PWM Buck DC/DC Converter

No Preview Available !

AX3023
BLOCK DIAGRAM
EN
200mV
CURRENT
SOURCE
BIAS
0.745V
REFERENCE
2.5V
REGULATOR
START
UP
220mV
OSC.
+
COMP_.
Current
limit
COMP.
+
+
FB _AMP
+
COMP.
CONTROL
+
COMP.
DRIVER
Thermal
Shutdown
VIN
SW
Vss
PIN ASSIGNMENT
The packages of AX3023 are SOT-23-5L and SOP-8L; the pin assignment is given by:
(Top View)
SW 1
5 VIN
VSS 2
FB 3
4 EN
SOT-23-5L
( Top View )
NC 1
8 NC
SW 2
7 NC
EN 3
6 VIN
VSS 4
5 FB
SOP-8L
Name
VIN
SW
FB
EN
VSS
NC
Description
Operating voltage input
Switching output
Output voltage feedback control
ON/OFF Shutdown
Ground pin
No connect Pin
2/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.5 Jun.28, 2010


Part Number AX3023
Description 1A PWM Buck DC/DC Converter
Maker AXElite
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AX3023 Datasheet PDF






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