Littelfuse released four versatile circuit protection devices in the eFuse Protection ICs product line. The latest eFuse Protection ICs utilize an innovative design ideal for a wide range of power inputs (3.3 V to 28 V) with highly integrated protection. These semiconductor-based electronic fuses provide robust overvoltage, overcurrent, short circuit, and inrush current protection. Additional features include reverse current blocking, under voltage lockout (UVLO), soft start, and overheating protection with real-time diagnostics — all in one compact chip.

These circuit protection devices are ideal for use in a wide range of electronics designs, including 5V applications, portable electronics, Bluetooth devices, wearables, smartphones, USB Type-C cables, IoT devices, 12-V applications, SSDs/HDDs, switch routers, enterprise servers, fan0 systems, telecom, appliances, 24- to 28-V applications, USB Type-C PD, power tools, industry, PLC, POS, and building.

“The expanded eFuse Protection ICs product line delivers clear performance advantages for electronics designers,” said Bernie Hsieh, assistant product manager of the protection semiconductor business team at Littelfuse. “Compared to traditional fuse, PTCs, power switches, and discrete solutions — like Schottky diode and MOSFET combinations — the eFuses provide exceptional integration, adjustability, flexibility, and reliable protection features in highly compact form factors that save PC board space.”

Not only do they offer fast response time; highly accurate current limiting; and integrated protection, control, and sensing features, they can also be programmed and customized to user specifications.

The latest additions to the eFuse Protection ICs are available in the following series:

  • LS0504EDD12 — 5-V, 4-A, low Ron power distribution load switch, DFN 1.2x1.6 package
  • LS12052BD33 — 18-V, 5-A, overvoltage and blocking FET control, DFN 2x2 package
  • LS2405IDD23 — 24-V, 5-A, very low forward voltage diode, low profile 8 lead DFN 2x3 package
  • LS24062RQ23 — 28-V, 6-A, bidirectional, dual port independent current limit setting, 16 lead QFN 2.5x3.2 package