Silicontent Technology


3.8V-32V Vin, 2A Synchronous Step-down DCDC Converter with EMI Reduction

Topology: Buck
Input Voltage (min.): 24.00 V
Input Voltage (max.): 24.00 V
Switching Frequency (min.): 450.00 kHz
Switching Frequency (max.): 550.00 kHz
Output 1: 5.00 V / 2.000 A

Original publication on 2018-09-17, revision 1.2 on


The SCT2321 is a 2A synchronous buck converter with up to 32V wide input voltage range, which fully integrates a 130mO high-side MOSFET and a 70mO low-side MOSFET to provide high efficiency step-down DCDC conversion. The SCT2321 adopts peak current mode control with the integrated compensation network, which makes SCT2321 easily to be used by minimizing the off-chip component count. The SCT2321 supports Force Pulse Width Modulation (FPWM) Mode to achieve the small output ripple at light load condition.

The SCT2321 is an Electromagnetic Interference (EMI) friendly buck converter with implementing optimized design for EMI reduction. The converter has proprietary designed gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off time, which erases high frequency radiation EMI noise caused by the MOSFETs hard switching.

The SCT2321 offers output over-voltage protection, cycle-by-cycle peak current limit, and thermal shutdown protection. The device is available in a low-profile TSOT23-6 package.


  • EMI Reduction with Switching Node Ringing-free
  • 500kHz Switching Frequency
  • Force Pulse Width Modulation (FPWM) Mode
  • 3.8V-32V Wide Input Voltage Range
  • Up to 2A Continuous Output Load Current
  • 0.8V ±1% Feedback Reference Voltage
  • Fully Int


  Order Code SPEC Simu-
Product family RDC
Material IR
Version Samples
744314101 PDF RE WE-HCI SMD Flat Wire High Current Inductor 33 10 Superflux 3.5 7.5 4 40 SMT