onsemi MC78LC50HT1G: Ultra-Low Quiescent Current 150 mA LDO Voltage Regulator

In the rapidly evolving world of portable and battery-powered electronics, power management efficiency is paramount. The onsemi MC78LC50HT1G stands out as a critical component, engineered to meet the stringent demands of applications where extended battery life and stable performance are non-negotiable. This ultra-low dropout (LDO) voltage regulator delivers a robust 150 mA output current while maintaining an exceptionally low quiescent current, making it an ideal solution for devices that spend significant time in standby or sleep modes.

One of the most compelling features of the MC78LC50HT1G is its ultra-low quiescent current of just 1.0 µA (typical). This remarkably low figure ensures that the regulator consumes minimal power when the load is light or inactive, drastically reducing the overall system power drain. For applications such as IoT sensors, wearable health monitors, smart meters, and other always-on or intermittently active devices, this characteristic directly translates to longer battery life and enhanced energy efficiency.

The device offers a fixed output voltage of 5.0 V, with a very low dropout voltage—typically 60 mV at 10 mA and 180 mV at the full 100 mA load. This low dropout performance ensures stable regulation even when the input voltage dips very close to the output level, which is crucial for maximizing the usable energy from batteries as they discharge. The regulator is designed for a wide input voltage range from 2.5 V to 12.0 V, providing significant flexibility in various power source scenarios.

Housed in a space-saving SC-82AB Surface-Mount package, the MC78LC50HT1G is tailored for compact PCB designs. Despite its small footprint, it incorporates essential protection features like internal current limiting and thermal shutdown, safeguarding both the regulator and the downstream circuitry from fault conditions. Its high accuracy (±2.5%) ensures a reliable and stable voltage supply for sensitive analog and digital components.

ICGOOODFIND: The onsemi MC78LC50HT1G is a superior choice for designers prioritizing ultra-low power consumption in space-constrained, battery-dependent applications. Its exceptional combination of minimal quiescent current, low dropout voltage, and integrated protection makes it a cornerstone component for enhancing the longevity and reliability of modern portable electronics.

Keywords:

Ultra-Low Quiescent Current

150 mA LDO Regulator

Low Dropout Voltage

Battery-Powered Applications

SC-82AB Package