4A, 19V, 40µA IQ, High Efficiency, Step-Down Converter with PG and External SS



The MP2326 is a fully integrated, high-efficiency, synchronous, step-down, switch-mode converter with a 40μA quiescent current. This very compact device achieves 4A continuous output current over a wide input supply range with excellent load and line regulation. It operates with high efficiency over a wide output current load range. It is optimized for battery-operated applications and applications requiring high light-load efficiency. With constant-on-time (COT) control, the MP2326 provides very fast transient response, easy loop design, and very tight output regulation. Full protection features include SCP, OCP, UVP, and thermal shutdown. The MP2326 requires a minimal number of readily available, standard external components with a space-saving 2mmx3mm, 14-pin QFN package.



  • 3.9V to 19V Operating Input Range
  • 4A Output Current
  • 40μA Quiescent Current
  • Output Adjustable from 0.6V
  • 90mΩ/30mΩ High-Side/Low-Side RDS(ON) for Internal Power MOSFETs
  • Power Good Indicator
  • Programmable Soft-Start Time
  • Forced PWM or Auto PFM/PWM Mode Selectable
  • Programmable Switching Frequency
  • Thermal Shutdown
  • Short-Circuit Protection: Hiccup Mode
  • Available in a QFN-14 (2mmx3mm) Package


  • fsw (max) (kHz)1100
  • Vin (min) (V)3.9
  • Vin (max) (V)19
  • Iout (max) (A)4
  • Isw Limit (typ) (A)7.5
  • Vfb (V)0.6
  • Iq (typ) (mA)0.04
  • Regulated Outputs1
  • Vout (min) (V)0.6
  • GradeCatalog
  • PackageQFN-14 (2x3)
  • Control ModeCOT
  • Common FeaturesExternal Soft Start, Light-Load Efficiency, Power Good, Synchronous Rectification
  • Special FeaturesProgrammable Frequency

4A, 19V, Constant-On-Time Step-Down Switcher Evaluation Board

The EV2326-D-00A is used for demonstrating the performance of MP2326, a fully-integrated, high efficiency, synchronous step-down switch mode converter with the feathered 40uA quiescent current. MP2326 provides up to 4A continuous output current over a wide input supply range with constant-on-time control for fast loop response.

High power efficiency over a wide load range is achieved by scaling down the switching frequency at light load to reduce the switching related loss by constant on time control. Short circuit and thermal shutdown provides reliable, fault-tolerant operation.

MP2326 is available in 2mmx3mm 14-pin QFN package.

¥2,716.25 + tax