75V, 0.3A, Synchronous Step-Down Converter with Watchdog

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Product Description

The MP2420 is a step-down switching regulator with integrated high- and low-side, high-voltage power MOSFETs. It achieves a highly efficient output of up to 0.3A, and the integrated watchdog adds additional security redundancy to the system. The wide 4.5V to 75V input range accommodates a variety of step-down applications in an automotive environment. A 5µA shutdown mode quiescent current in a full temperature range is ideal for battery-powered applications. The MP2420 allows for high-power conversion efficiency over a wide load range by scaling down the switching frequency under light-load conditions to reduce switching and gate driver losses. The start-up switching frequency and short circuit can also be scaled down to prevent an inductor current runaway. Full protection features include under-voltage lockout (UVLO) and thermal shutdown. Thermal shutdown provides reliable, fault-tolerant operation. The MP2420 is available in a TSSOP-16 EP package.


Product Features

  • 20µA Quiescent Current for Buck Only
  • Wide 4.5V to 75V Operating Input Range (80V ABS MAX)
  • 1.2O/0.45O Internal Power MOSFETs
  • Programmable Soft Start
  • FB Tolerance: 1% at Room Temperature, 2% at Full Temperature
  • Adjustable Output Voltage
  • Integrated Window Watchdog
  • Power-On Reset during Power Up and Under-Voltage Lockout (UVLO)
  • Programmable Short Window Mode or Long Window Mode
  • Low Shutdown Mode Current of 5µA
  • Available in a TSSOP-16 EP Package


  • fsw (max) (kHz)1000
  • Vin (min) (V)4.5
  • Vin (max) (V)75
  • Iout (max) (A)0.3
  • Vfb (typ) (V)1
  • Iq (typ) (mA)0.02
  • Regulated Outputs1
  • GradeCatalog
  • PackageTSSOP16 EP
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start, Power Good, Synchronous Rectification
  • Special FeaturesProgrammable Frequency