3V-28V Input, Hysteretic Synchronous Step-Down Controller



The MP2905 is a hysteretic voltage-mode control, synchronous PWM buck controller. The output voltage can be regulated from 0.6V to 0.9*VIN. It achieves high output current over a wide input supply range from 3V-28V.  MP2905 integrates an internal LDO regulator that makes the controller function at a wide input supply.  Hysteretic voltage-mode control provides fast transient response without additional loop compensation.  An adjustable soft-start prevents inrush current at turn-on. The device senses high-side switch voltage drop for hiccup current limit and short current protection. The frequency is adjustable from 200kHz to 500kHz. The MP2905 is available in 10-pin MSOP package, provides a very compact system solution with minimal reliance on external components.


  • Wide 3V to 28V Operating Input Range
  • Output Adjustable from 0.6V to 0.9*Vin
  • Switching frequency from 200kHz to 500kHz
  • Programmable Soft-Start
  • Hiccup current limit
  • Lossless peak current sensing
  • MSOP-10 package


  • PGNo
  • SSExternal
  • Special FeaturesFrequency Adjustable, Hiccup Current Limit
  • GradeCatalog
  • fsw (max) (kHz)500
  • Regulated Outputs1
  • Iq (typ) (mA)0.6
  • Vfb (V)0.6
  • PackageMSOP-10
  • Max Duty Cycle (%)0.9
  • Vin (max) (V)28
  • Vin (min) (V)3

1.2V, 10A, 300kHz, Hysteretic Synchronous Step-Down Controller Evaluation Board

The EV2905A-K-01A is the evaluation board for the MP2905AEK, a hysteretic synchronous step-down controller. It offers a very compact solution to achieve 1.2V, 10A continuous output current from a 10.8V to 13.2V input voltage range over a wide operation input voltage. An adjustable soft-start prevents inrush current at turn-on.

Hysteretic voltage control can provide fast transient without any loop compensation. Full protection features include OCP, output OVP, thermal shut down.

The EV2905A-K-01A frequency is approximately 300kHz (12V input). Peak Current limit is set at 15A. The efficiency is up to 90% (12V input) with the supplied components.

¥2,653.00 + tax