MP4568

MP4568 60V, 100mA Synchronous Step-Down Converter DESCRIPTION The MP4568 is a high-frequency, step-down, switching regulator with integrated highside/low-side, high-voltage power MOSFETs. It provides a highly efficient output of up to 100mA. 60V rated MOSFETs and 4.5V to 45V operation range accommodates a variety of step-down applications in automotive input environment. A 5μA shutdown mode quiescent current allows use in battery-powered applications. It allows for high power conversion efficiency over a wide load range by scaling down the switching frequency under light-load condition to reduce the switching and gate driver losses. The switching frequency during start-up and short circuit also can be scaled down to helps prevent inductor current runaway. Thermal shutdown provides reliable, fault-tolerant operation. The MP4568 is available in a 3mmx3mm QFN10 package. TYPICAL APPLICATION VIN R3 2M EN R4 100k BST 1 U1 10 IN C2 0.1uF SW 2 C1 10uF MP4568 9 EN 8 ENHY 6 ILIM 7 SS BIAS 4 FB 5 L1 100uH C3 22uF 5V/100mA VOUT R1 1.2M R2 300k FEATURES  20μA Quiescent Current  Wide 4.5V to 45V Operating Range with 50V Input OVP  60V Integrated MOSFETs with 0.7Ω and 2.25Ω Ron  Programmable Switching Frequency  Stable with Ceramic Output Capacitors  Low Output Ripple  Programmable Soft-Start  Adjustable Input UVLO Hysteresis  Precision Peak Current Limit without Current-Sensing Resistor  Programmable Peak Current Limit  >90% Efficiency at 10V VIN to 5V VOUT/2mA  1...