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AX2001 Datasheet

0.25V Feedback Voltage Step-Down Switching Regulators

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AX2001/A
1A, 0.25V Feedback Voltage Step-Down
Switching Regulators for LED Driver
GENERAL DESCRIPTION
AX2001/A consists of step-down switching regulator with PWM control. These devise
include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and
etc.
AX2001/A provides low-ripple power, high efficiency, and excellent transient
characteristics. The PWM control circuit is able to the duty ratio linearly from 0 up to 100%.
An enable function, an over current protect function and short circuit protect function are
built inside, and when OCP or SCP happens, the operation frequency will be reduced. Also,
an internal compensation block is built in to minimum external component count.
With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode
connected externally, these ICs can function as step-down switching regulators. They serve
as ideal power supply units for portable devices when coupled with the SOP-8L package,
providing such outstanding features as low current consumption. Since this converter can
accommodate an input voltage up to 23V, it is also suitable for the operation via an AC
adapter.
FEATURES
- Input voltage4.5V to 23V
- Output voltage0.25V to VCC
- LED Backlight and High Power LED Application
- Duty ratio0% to 100% PWM control
- Oscillation frequency
AX2001: 330KHz typ.
AX2001A: 500KHz typ.
- Enable/Disable function.
- Current Limit (CL), Thermal Shutdown and Short Circuit Protections (SCP).
- Built-in internal SW P-channel MOS.
- No output capacitor is stable.
- SOP-8L Pb-Free package.
1/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Oct.21, 2011




AXElite

AX2001 Datasheet Preview

AX2001 Datasheet

0.25V Feedback Voltage Step-Down Switching Regulators

No Preview Available !

AX2001/A
BLOCK DIAGRAM
SW
Vcc
Thermal
Shutdown
Oscillator
Circuit
Reference Voltage
PWM Switched
Control Circuit
+
-
Current
VEN Limit
FB
Vss
EN Comp
PIN ASSIGNMET
The package of AX2001/A is SOP-8L; the pin assignment is given by:
( Top View )
FB 1
EN
Comp
2
3
Vcc 4
SOP-8L
8 Vss
7 Vss
6 SW
5 SW
Name
FB
EN
Comp
VCC
SW
VSS
Description
Feedback pin
Power-off pin
Hnormal operation(Step-down)
LStep-down operation stopped
(All circuits deactivated)
Compensation pin
IC power supply pin
Switch pin. Connect external
inductor/diode here.
GND pin
ORDER/MARKING INFORMATION
Order Information
AX2001 X X X
Frequecny
Package Type
Blank : 330KHz S: SOP-8L
A : 500KHz
Packing
Blank : Tube
A : Taping
Top Marking
Logo AX 2 0 0 1
A YYWWX
AX2001A
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.1.2 Oct.21, 2011


Part Number AX2001
Description 0.25V Feedback Voltage Step-Down Switching Regulators
Maker AXElite
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