SIT2576HV is a step-down switch voltage regulator chip that can output 3.3V, 5V, 12V fixedly, or adjust the output voltage as needed. The voltage output range is 1.23V~57V ± 4%, and the output current can reach 3A; It also has excellent linear adjustment rate and load adjustment rate. SIT2576HV integrates frequency compensation and fixed frequency generator internally, with a switching frequency of 52kHz. Compared with low-frequency switching chips, smaller filter components can be used. The fixed output voltage version only requires 4 peripheral components and can use a universal standard inductor, which further optimizes the use of SIT2576HV and greatly simplifies the design of the switching power supply circuit, saving peripheral costs and volume. SIT2576HV has current limiting protection and over temperature protection functions; The output of the chip can be controlled through external logic levels to put the chip into sleep mode. The SIT2576HV packaging includes standard 5-pin TO-220 packaging (DIP) and 5-pin TO-263 surface mount packaging (SMD).