SIP32433A/B and SIP32434A/B True Reverse Current Blocking eFuses

Vishay's eFuses feature programmable current limits and OVP in a compact 3 mm by 3 mm TDFN package. Designed to operate over a wide 2.8 V to 23 V input voltage range with a 28 V_IN DC tolerance, the 3.5 A SiP32433A/B and 6 A SiP32434A/B integrate multiple control and protection features to simplify designs and minimize the need for external components. While most competing solutions only offer voltages to 18 V or are missing their low-voltage side, the input voltage range of the SiP32433A/B and SiP32434A/B allows them to be used in a wider range of designs. The single-channel load switches provide precise control and swift fault responses to enhance the safety and reliability of system designs while increasing design flexibility and simplifying BOMs. Upon switch-off due to latchable faults, the SiP32433A and SiP32434A are designed to latch the power switch off while the SiP32433B and SiP32434B will auto-retry after a settable period of time. All four devices respond swiftly to short circuits and their precise overcurrent protection (OCP) is triggered at a set current limit level without an excessive overhead current requirement, an important characteristic for designs in which power busses need to support multiple loads. Competing solutions often require overhead currents of more than 30%. With active reverse blocking, the SiP32433A and SiP32433B target applications featuring USB Type-C and multiple power source switching. The load switches reduce on-resistance by 43% compared to previous-generation solutions which translates into a 32% higher current capability or increased efficiency at the same current level.