 GENERAL DESCRIPTION
The AX3901 is a high efficiency synchronous step-down DC/DC converter series with 2A continuous output current supplied.
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 AX3901 is available in SOT-23-6L and TDFN 6L Packages.

 FEATURES
- Input Voltage Supply Range from 4.5V to 18V
- Power Saving Mode (PSM) during the light Load Operation1.2MHz Constant Frequency Operation
- High Efficiency up to 95%
- Adjustable Output Voltage from 0.6V to 12V
- 2 A Continuous Output Current
- 500kHz Constant Frequency Operation
- Current Mode Operation
- Over-temperature Protection
- Over current Protection
- Input Under Voltage Lockout (UVLO)
- 10µA Shutdo wn Current
- RoHS Compliant (100% Green Available)
- RoHS and Halogen free compliance

Applications
- Datacom. DSL CPE Graphics Cards
- Set-Top-Box, DVD
- Servers/Networking
- DSP and FPGA Power Supply
- Telecomm Equipment
- DC-DC Regulator Modules
- LCD Monitor and LCD TV