Consumer Peripherals

Littelfuse launches eFuse Protection ICs series

05 October 2022

Industrial technology manufacturer Littelfuse has unveiled the new eFuse Protection ICs product line, a series of four versatile circuit protection devices.

The eFuse Protection ICs utilize an innovative design that provides a wide range of power input (3.3 V to 28 V) and integrated protection. In addition to overvoltage protection, these electronic fuses protect against overcurrent, short circuit, inrush current, reverse current and overtemperature events with real-time diagnostics — all in one chip.

The eFuse Protection ICs are ideal for use in a wide range of consumer electronics and dataSource: Littelfuse Inc.Source: Littelfuse Inc. communications interfaces, including:

  • Bluetooth headsets
  • Wearable devices
  • Tablet PCs
  • Charging cables
  • Battery devices
  • Adapter-powered devices
  • Networking
  • PCs/notebooks
  • Datacom power systems
  • Fan power controls
  • HDD and SSD storage drives
  • Industry 12 V/24 power input/output

“The eFuse Protection ICs provide today’s electronics designers with significant flexibility by integrating robust circuit protection, sensing, and control in a single chip,” said Bernie Hsieh, assistant product manager of the protection semiconductor business team at Littelfuse. “Providing a low power consumption, high accuracy current limiting circuit with quick response time makes them a win-win-win for many portable electronics and datacom applications.”

The eFuse Protection ICs offer these key benefits:

  • Provides a highly accurate current limiter, with faster response time, and more integrated protection features than traditional fuses and PTCs
  • Incorporates more flexibility such as adjustable overvoltage threshold, current limiting and inrush current, along with true reverse current blocking compared to conventional power switches
  • Reduces the design-in phase, PC board space requirements, BOM cost and time-to-market when versus typical discrete solutions (e.g., hot-swap controller plus MOSFET)
  • Improved product reliability, increased battery life, lower repair costs and lengthened overall product lifetime

The eFuse Protection ICs are available in the following series:

  • LS0504EVT233 — 5 V, 4 A, overvoltage, overcurrent protection, SOT23-3 package
  • LS0505EVD22 — 5 V, 5 A, overvoltage, overcurrent protection, DFN2x2 package
  • LS1205ExD33 — 18 V, 5 A, programmable current limit, output voltage clamp, DFN3x3 package
  • LS2406ERQ23 — 28 V, 6 A, true reverse blocking, fast role swap, QFN2.5x3.2 package


The eFuse Protection ICs are available in tape and reel format in quantities of 3,000 (LS0504EVT23, LS0505EVD22) or 5,000 (LS1205ExD33, LS2406ERQ23).

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