Monolithic Power Systems — MP21600: 0.6A, 5.5V, 2.2MHz, Synchronous Step Down Converter

The MP21600 is a monolithic, step down, switch-mode converter with built-in, internal power MOSFETs. The MP21600 achieves 0.6A of continuous output current from a 2.3V to 5.5V input voltage range with excellent load and line regulation. The output voltage can be regulated as low as 0.6V. The constant-on-time (COT) control scheme provides fast transient response and eases loop stabilization. Fault protections include cycle-by-cycle current limiting and thermal shutdown.


  • 2.4MHz switching frequency
  • 2.3V to 5.5V operating input range
  • Up to 0.6A output current
  • Output discharge
  • Short circuit protection (SCP) with hiccup mode
  • Enable (EN) pin for power sequencing
  • Output adjustable from 0.6V
  • 120mΩ and 80mΩ internal power MOSFET switches
  • 100% duty cycle
  • Stable with n=low ESR output ceramic capacitors