GENERAL DESCRIPTION

The AX3484 is a monolithic synchronous buck regulator. The device integrates two 100mΩ MOSFETs, and provides 3A of continuous load current over a wide input voltage of 4.75V to 23V. Current mode control provides fast transient response and Cycle-by-Cycle current limit.

An adjustable soft-start prevents inrush current at turn-on, and in shutdown mode the supply current drops to 1μA.

This device, available in an 8-pin SOP with exposed pad package, provides a very compact solution with minimal external components.

 FEATURES

- 3A Output Current

- Wide 4.75V to 23V Operating Input Range

- Integrated 100mΩ Power MOSFET Switches

- Output adjust from VFB to 20V

- Up to 95% Efficiency

- Programmable Soft-Start

- Stable with Low ESR Ceramic Output Capacitors

- Fixed 350KHz Frequency

- Cycle-by-Cycle Over Current Protection

- Thermal shutdown and short circuit protections

- RoHS and Halogen free compliance.