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diotec (Diotec Semiconductor AG)

Diotec Semiconductor AG

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May 20, 2025

Diotec’s LDI67-05EEN: Precision LDO in ESOP-8 for Smoke Sensor Applications

Diotec introduces the LDI67-05EEN, a high-voltage, low-dropout linear regulator optimized for powering +5.0 V smoke sensor circuits with a tight ±1.5% output tolerance and up to 80 mA load current.

Key specs and features:

  • Input Voltage: Up to 60 V
  • Output Current: 80 mA
  • Quiescent Current: Ultra-low for extended battery life
  • Enable Function: Ideal for low-power system standby modes
  • Thermal Overload Protection: Ensures intrinsic safety
  • Package: Thermally efficient ESOP-8


This LDO is engineered for applications where long battery life, compact form factor, and thermal reliability are non-negotiable - such as in photoelectric smoke detectors. In storage mode (e.g., during packaging and shipping), the enable function keeps the system in deep sleep, reducing unnecessary drain. Once installed, the regulator activates reliably, maintaining safe operating conditions and minimizing heat thanks to low dropout and efficient thermal design.

Whether your system is powered by a 9 V battery or a 24 V industrial bus, the LDI67-05EEN ensures robust 5 V regulation and long-term performance - meeting the typical 10-year lifetime requirement of modern smoke detectors.

Explore the details at diotec.com/LDI67-05EEN and integrate smarter power today.