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AXElite

AX3001 Datasheet Preview

AX3001 Datasheet

2A PWM Buck DC/DC Converter

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AX3001
150KHz, 2A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The AX3001 series are monolithic IC designed for a step-down DC/DC converter, and
own the ability of driving a 2A 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 AX3001 series operates at a switching
frequency of 150KHz thus allow smaller sized filter components than what would be
needed with lower frequency switching regulators. The output version included fixed 3.3V,
5V, 12V, and an adjustable type. The chips are available in a standard 8-lead SOP
package.
FEATURES
- Output voltage: 3.3V, 5V, 12V and adjustable output version.
- Adjustable version output voltage range, 1.23V to 19.5V.
- 150KHz 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 22V.
- Output load current: 2A.
- SOP-8L Pb-Free packages.
- Low power standby mode.
- Built-in switching transistor on chip.
1/11




AXElite

AX3001 Datasheet Preview

AX3001 Datasheet

2A PWM Buck DC/DC Converter

No Preview Available !

AX3001
BLOCK DIAGRAM
EN
CURRENT
SOURCE
BIAS
1.235V
REFERENCE
2.5V
REGULATOR
START
UP
220mV
FB
R2
R1
+
_AMP
COMP.
ADJ : R2=0Ω , R1=OPEN
150kHz
OSC.
+
COMP_.
Current
limit
COMP.
+
+
COMP.
CONTROL
+
DRIVER
Thermal
Shutdown
200mV
V CC
SWITCH
SW
Vss
PIN ASSIGNMENT
The package of AX3001 is SOP-8L; the pin assignment is given by:
( Top View )
VCC 1
SW 2
8 VSS
7 VSS
FB 3
6 VSS
EN 4
SOP8L
5 VSS
Name
VCC
SW
FB
EN
VSS
Description
Operating voltage input
Switching output
Output voltage feedback control
ON/OFF Shutdown
GND pin
2/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.2.0 Jul.11, 2011


Part Number AX3001
Description 2A PWM Buck DC/DC Converter
Maker AXElite
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AX3001 Datasheet PDF






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