MIC69502WR-TR: Powering Precision Systems with a 5V, 500mA High-Accuracy Regulator

In the realm of modern electronics, the demand for stable and precise power delivery is paramount, especially for sensitive microcontrollers (μCs), sensors, and analog circuits. The MIC69502WR-TR from Microchip Technology stands out as a dedicated high-performance solution designed to meet this critical need. This high-accuracy, low-dropout (LDO) voltage regulator provides a rock-solid 5V output at currents up to 500mA, making it an ideal choice for a vast array of applications.

The core strength of the MIC69502WR-TR lies in its exceptional accuracy and stability. It features a tight output voltage tolerance of ±1.8% over line, load, and temperature variations. This precision ensures that connected components, such as a microcontroller's analog-to-digital converter (ADC), receive a consistent reference voltage, which is crucial for maintaining the integrity of measurements and overall system performance. Furthermore, the device boasts an impressively low dropout voltage, typically 210mV at 500mA, allowing it to continue regulating effectively even when the input voltage dips very close to the 5V output level. This characteristic is essential for maximizing battery life in portable applications and for maintaining operation during power transients.

Beyond accuracy, the MIC69502WR-TR is engineered for robust system protection and ease of use. It includes key features like over-current protection (OCP) and thermal shutdown, which safeguard both the regulator itself and the downstream components from damage during fault conditions. The device is stable with small, space-saving ceramic capacitors, simplifying board design and reducing the overall bill of materials. Its SOT-23-5 package is ideal for compact PCB layouts, and an enable pin provides simple on/off control for power sequencing or sleep modes.

Typical applications are widespread, including:

μC and MPU Power Rails: Providing clean, noise-free power to core and I/O sections.

Industrial and Automotive Sensor Modules: Where precision analog performance is non-negotiable.

Point-of-Load (POL) Regulation: Distributed power architectures in larger systems.

Portable Battery-Powered Equipment: Leveraging its low dropout to extend usable battery voltage range.

Medical and Measurement Devices: Where signal accuracy is directly tied to power supply quality.

ICGOOODFIND: The MIC69502WR-TR is a superior choice for designers seeking a reliable, high-accuracy 5V power source. Its combination of exceptional voltage precision, robust 500mA output current, and integrated protection features makes it a versatile and dependable foundation for powering critical circuitry in demanding environments.

Keywords: High-Accuracy LDO, 5V Voltage Regulator, 500mA Output, Low Dropout Voltage, μC Power Management