Maxim Integrated MAX17501 / MAX17502 / MAX17503 high-efficiency, high-voltage, synchronous step-down DC-DC converters with integrated MOSFETs operate over a 4.5V to 60V input voltage range. These Maxim Integrated devices feature peak-current-mode control with pulse-width modulation (PWM). The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout. A programmable soft-start feature allows users to reduce input inrush current. These step-down DC-DC converters also incorporate an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input voltage level.