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) 1.2O/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 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