STMicroelectronics Low Dropout Voltage Regulator 18V, 200 mA Output, 125°C Operating Temperature LDK320AU50R

The STMicroelectronics LDK320AU50R is a low dropout (LDO) voltage regulator designed for applications requiring a stable and precise output voltage with low current consumption. It supports a maximum input voltage of 18 V and delivers up to 200 mA output current, making it ideal for low power battery-operated and portable devices. The device operates efficiently over a temperature range of -40 °C to 125 °C and features a dropout voltage of approximately 100 mV at 100 mA load.

This voltage regulator includes a logic-controlled enable pin, which allows the regulator to enter a low power shutdown mode with a current consumption below 1 µA, optimizing power usage in battery-sensitive applications. Its high power supply rejection ratio (PSRR) of 88 dB at 120 Hz ensures stable operation even in noisy power environments.

Designed for reliable performance, the LDK320AU50R integrates protections such as current limiting, safe operating area (SOA) protection, and thermal shutdown, enhancing device safety and longevity. It requires a ceramic output capacitor of 1 µF for stability and is fully RoHS compliant.

Wide input voltage range from 2.5 V to 18 V supports various power sources. Low dropout voltage minimizes power loss and heat generation. Ultra-low quiescent current conserves battery life during operation. Logic-controlled shutdown reduces power consumption to under 1 µA when disabled.

High PSRR reduces output noise, protecting sensitive downstream circuits. Robust thermal and current protections ensure operational safety. Suitable for industrial, consumer electronics, and battery-powered applications.

This regulator fits perfectly in power management units of electronics, industrial equipment, laboratory instruments, and automotive electronics excluding automotive specific standards. Its compact design and high precision make it a preferred choice for engineers and designers looking to implement efficient voltage regulation solutions.

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