New Industry Products

1A, Synchronous, Step-Down DC-DC with Soft Start Control & Power Good Signal

September 26, 2019 by Paul Shepard

The MP2181 from Monolithic Power Systems is a monolithic, step-down, dc-dc converter with built-in internal power MOSFETs. It achieves 1A continuous output current from a 2.5V to 5.5V input voltage with excellent load and line regulation. The output voltage can be regulated to 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.

The MP2181 is available in an ultra-small SOT583 package, and requires a minimal number of readily available, standard external components.

The MP2181 is ideal for a wide range of applications including high-performance DSPs, wireless power, portable and mobile devices, and other low-power systems.

Product Features

  • Low IQ: 21μA
  • 2MHz Switching Frequency
  • EN for Power Sequencing
  • 1% FB Accuracy
  • Wide 2.5V to 5.5V Operating Input Range
  • Output Adjustable from 0.6V
  • Up to 1A Output Current
  • 90mΩ and 50mΩ Internal Power MOSFET Switches
  • 100% Duty On
  • Output Discharge
  • VO OVP
  • External Soft-Start Control
  • Short-Circuit Protection with Hiccup Mode
  • Power Good
  • Available in a SOT583 Package