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Axelite Confidential Materials, do not copy or distribute without written consent.

Rev.1.4 Mar. 06, 2015

AX3112/A

PWM Control 3A Step-Down Converter



GENERAL DESCRIPTION

AX3112/A consists of step-down switching regulator with PWM control. The device

includes a reference voltage source, oscillation circuit, error amplifier, internal PMOS and

etc.

AX3112/A provides low-ripple power, high efficiency, and excellent transient

characteristics. The PWM control circuit is able to the duty ratio linearly forms 0 up to 100%.

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-EP

package, providing such outstanding features as low current consumption. Since this

converter can accommodate an input voltage up to 40V, it is also suitable for the operation

via an AC adapter.



FEATURES

- Input voltage：8V to 40V

- Adjustable version output voltage range from 3.3V to 38V

- Duty ratio：0% to 100% PWM control

- Oscillation frequency：100K/350 KHz

- Enable and auto restart function.

- Thermal Shutdown function / Internal OVP.

- Short Circuit Protect (SCP).

- Built-in internal SW P-channel MOS.

- SOP-8L-EP Pb-Free package.