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AXElite - 0.25V Feedback Voltage Step-Down Switching Regulators

Numéro de référence AX2003
Description 0.25V Feedback Voltage Step-Down Switching Regulators
Fabricant AXElite 
Logo AXElite 





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AX2003 fiche technique
AX2003/A
3A, 0.25V Feedback Voltage Step-Down
Switching Regulators for LED Driver
™ GENERAL DESCRIPTION
AX2003/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.
AX2003/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 voltage3.6V to 23V
- Output voltage0.25V to Vcc
- LED Backlight and High Power LED Application
- Duty ratio0% to 100% PWM control
- Oscillation frequency
AX2003 : 330KHz typ.
AX2003A: 500KHz typ.
- Enable/Disable function.
- Current Limit (CL), Thermal Shutdown and Short Circuit Protections (SCP).
- Built-in internal SW P-channel MOS.
- Low ESR output capacitor (Multi-layer chip capacitor (MLCC)) application.
- SOP-8L Pb-Free package.
1/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Feb.16, 2009
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