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



The MPQ2420 is a step-down switching regulator with integrated high- and low-side, high-voltage power MOSFETs. It provides a highly efficient output of up to 0.3A. 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. It allows for high-power conversion efficiency over a wide load range by scaling down the switching frequency under a light-load condition to reduce switching and gate driver losses. The start-up switching frequency and short circuit can also be scaled down to prevent inductor current runaway. Full protection features include under-voltage lockout (UVLO) and thermal shutdown. Thermal shutdown provides reliable, fault-tolerant operation. The MPQ2420 is available in a TSSOP-16 EP package.


  • 20µA Quiescent Current for Buck Only
  • Wide 4.5V to 75V Operating Input Range (80V ABS MAX)
  • 1.2Ω/0.45Ω) 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
  • Under-Voltage Lockout and Thermal Shutdown
  • Programmable Short Window Mode or Long Window Mode
  • Low Shutdown Mode Current of 5µA
  • TSSOP-16 EP Package
  • Available in AEC-Q100 Grade 1


  • PackageTSSOP16
  • GradeAutomotive
  • Common FeaturesExternal Soft Start, Power Good, Synchronous Rectification
  • Control ModeCurrent Mode
  • VCC (max) (V)75
  • Vthreshold (typ) (V)4.2
  • Reset Threshold Accuracy (±%)4.3
  • Special FeaturesProgrammable Frequency
  • Iq (typ) (µA)0.02
  • VCC (min) (V)4.5