1/17

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

Rev.1.1 Nov.05, 2019

AX3984

23V/3A High Efficiency Synchronous Rectified

Step-Down DC/DC Converter



GENERAL DESCRIPTION

The AX3984 is a high efficiency synchronous step-down DC/DC converter series with 3A

continuous output current supplied. Included on the substrate with the features listed is a high

performance trans-conductance error amplifier that provides tight voltage regulation and accuracy

under transient conditions. A built-in Under Voltage Lockout (UVLO) circuit is provided to prevent

start-up until the input voltage reaches to 4.5V. In addition, it features over-current protection and

thermal shutdown. To improve the light load efficiency, it is designed as the power saving mode

(PSM) to minimize the switching loss by reducing the switching frequency.

The AX3984 is available in SOP8_EP package.



FEATURES

- Input Voltage Supply Range from 4.5V to 23V

- Power Saving Mode (PSM) during the light Load Operation

-

High Efficiency up to 93%

-

Adjustable Output Voltage from 0.925V to 15V

-

3A Continuous Output Current

-

330KHz Constant Frequency Operation

-

Current Mode Operation

-

Programmable Soft-Start

-

Over-temperature Protection

-

Over-current Protection

-

Input Under Voltage Lockout (UVLO)

-

10μA Shutdown Current

-

SOP8_EP Package

-

RoHS and Halogen free compliance.