EC3293B-3A, 18V, 500KHz, Syn. Step Down DC/DC Conv

General description

The EC3293B is a high-frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 3A continuous output current over a wide input supply range, with excellent load and line regulation. The EC3293B has synchronous-mode operation for higher efficiency over the output current-load range.

Current-mode operation provides fast transient response and eases loop stabilization.Protection features include over-current protection and thermal shutdown.

The EC3293B requires a minimal number of readily available, standard external components and is available in a space-saving TSOT23-6L package.



  • 4.5V to 18V input voltage
  • Output adjustable from 0.6V to 15V
  • Output current up to 3A
  • Integrated 85mΩ/45mΩ power MOSFET switches
  • Shutdown current 3μA typical
  • Efficiency up to 95%
  • Fixed frequency 500KHz
  • Internal soft start
  • Over current protection and Hiccup
  • Over temperature protection
  • RoHS Compliant and 100% Lead (Pb) Free



  • Distributed power systems
  • Networking systems
  • FPGA, DSP, ASIC power supplies
  • Notebook computers
  • Green electronics or appliance


Pin Configurations

Ordering info

Typical Applications circuit