MCP1755T-5002E/OT 500mA Low-Dropout (LDO) Voltage Regulator Technical Overview

The MCP1755T-5002E/OT is a high-performance, 500mA low-dropout voltage regulator from Microchip Technology, designed for space-constrained and power-sensitive applications. It provides a fixed 5.0V output from an input voltage range of 2.7V to 6.0V, making it particularly suited for systems powered by single-cell Li-Ion batteries or multi-cell alkaline/NiMH batteries where the input voltage can drift close to the output level.

A key feature of this LDO is its extremely low dropout voltage, typically 178 mV at 500 mA load, which maximizes efficiency and extends battery life by allowing the regulator to continue operating even when the input voltage dips very close to the output voltage. This is critical for applications where every millivolt of available power must be utilized. Furthermore, the device boasts a very low quiescent current of just 3.5 µA (typical), which significantly reduces power consumption during light-load or standby modes.

The MCP1755 series is designed for stability with small, low-ESR ceramic capacitors, minimizing the required board space and component count. The MCP1755T-5002E/OT is offered in the miniature SOT-23-5 package, ideal for portable and compact designs such as smartphones, IoT modules, and wearable electronics. It also includes essential protection features like overcurrent protection (OCP) and overtemperature shutdown (TSD), safeguarding both the regulator and the downstream circuitry under fault conditions.

Despite its small size, the regulator delivers excellent performance with a typical line regulation of 0.06% and load regulation of 0.12%. Its low-noise operation and fast transient response make it a reliable power management solution for noise-sensitive analog and digital components.

ICGOODFIND: The MCP1755T-5002E/OT stands out as an exceptional choice for designers seeking a miniature, high-efficiency, and reliable 5V power solution. Its combination of a low dropout voltage, ultra-low quiescent current, and robust protection features in a SOT-23 package makes it a superior component for optimizing battery runtime and reliability in modern portable electronics.

Keywords: Low Dropout Voltage, Low Quiescent Current, 500mA LDO, Battery-Powered Applications, SOT-23 Package.