1A Synchronous Step-down Converter with Forced CCM

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Product Description

The MP1601A is a monolithic, step-down, switch-mode converter with built-in, internal power MOSFETs. It achieves 1A 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 in forced continuous conduction mode (CCM) provides a fast transient response, a low output voltage ripple, and eases loop stabilization. Fault protections include cycle-by-cycle current limiting and thermal shutdown. The MP1601A is available in an ultra-small SOT563 package and requires a minimal number of readily available, standard, external components. The MP1601A 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

  • 2.2MHz Switching Frequency
  • EN for Power Sequencing
  • Wide 2.3V to 5.5V Operating Input Range
  • Output Adjustable from 0.6V
  • Up to 1A Output Current
  • 160m? and 120m? Internal Power MOSFET Switches
  • Output Discharge
  • 100% Duty Cycle
  • Short-Circuit Protection (SCP) with Hiccup Mode
  • Stable with Low ESR Output Ceramic Capacitors
  • Continuous Conduction Mode (CCM)
  • Available in a SOT563 Package


  • fsw (max) (kHz)2200
  • Vin (min) (V)2.3
  • Vin (max) (V)5.5
  • Iout (max) (A)1
  • Isw Limit (typ) (A)2
  • Max Duty Cycle (%)1
  • Vfb (typ) (V)0.6
  • Iq (typ) (mA)0.5
  • Regulated Outputs1
  • Vout (max) (V)5.5
  • Vout (min) (V)0.6
  • mps_Status2
  • Mps StatusActive
  • GradeCatalog
  • PackageSOT563
  • Control ModeCOT with fixed CCM
  • Common FeaturesForced CCM, Synchronous Rectification
  • Special Features100% Duty Cycle, Output Discharge