Infineon's TLF502x1-family are asynchronous DC / DCs with integrated power transistors providing 500 mA output current at 5 V (±2%). TLF502x1 can be operated with up to 100% duty-cycle with an input voltage range from 4.75 V up to 45 V. At low loads, the ultra-low current consumption of less than 45 μA is achieved by a change from PWM- to PFM-mode. The adjustable switching frequency of up to 2.2 MHz can be synchronized to an external clock. This high-switching frequency allows the use of small and cost-effective inductors and capacitors, resulting in a low, predictable output voltage ripple and in minimized consumption of board space. The integrated compensation and soft-start function allows easy implementation and reduction of external components as well. The TLF502x1-family is covering features required in automotive applications like enable, reset with adjustable threshold, and watchdog with adjustable timing. The family pin-out enables flexibility and reduction of design efforts. The devices include protection features such as a cycle-by-cycle current limitation, over-temperature shutdown, and input under-voltage lockout. The TLF502x1-family is coming in a small, thermal enhanced SSOP-14 exposed-pad package (RoHS).