This data brief introduces the STEVAL-ISA082V1, a 4A peak 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40IPHR. The board operates from 4 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN (100% duty cycle). It has a short-circuit protected and is RoHS compliant.