The STEVAL-ISA146V1 is a product evaluation board used to evaluate the ST1S50, a 500 kHz fixed-frequency PWM synchronous step-down regulator. The ST1S50 operates from a 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to 0.88 x VIN. https://elecena.pl/product/8156659/steval-isa146v1-4-a-step-down-switching-evaluation-board-based-on-the-st1s50 2017-03-26 https://elecena.pl/product/8156659/steval-isa146v1-4-a-step-down-switching-evaluation-board-based-on-the-st1s50 2020-06-05 https://elecena.pl/product/8156659/steval-isa146v1-4-a-step-down-switching-evaluation-board-based-on-the-st1s50 2021-04-02 https://elecena.pl/product/8156659/steval-isa146v1-4-a-step-down-switching-evaluation-board-based-on-the-st1s50 2025-04-18