Microchip MCP1804T-3302I/MT 3V LDO Voltage Regulator Technical Overview

The Microchip MCP1804T-3302I/MT is a low-dropout (LDO) linear voltage regulator designed to deliver a fixed, precise 3.3V output from a higher input voltage source. Housed in a compact 8-pin DFN (2x3mm) package, this device is engineered for space-constrained and power-sensitive applications requiring a clean and stable voltage rail.

A key operational feature of this LDO is its extremely low quiescent current, which typically measures just 95 µA during standard operation. This characteristic makes it exceptionally suitable for battery-powered devices where maximizing operational lifetime is paramount. The regulator maintains high efficiency by minimizing its own power consumption, especially when the load current is small.

The MCP1804 series is defined by its very low dropout voltage. Specifically, the device requires only 178 mV (typical) at a 150 mA load to maintain output regulation. This low dropout performance allows the regulator to continue functioning correctly even as the input voltage dips very close to the output voltage, a critical advantage when dealing with discharging batteries or noisy power rails.

Despite its small size, the regulator is capable of delivering a continuous output current of up to 150 mA. It incorporates essential protection features such as internal current limiting and thermal shutdown, which safeguard the device and the downstream circuitry from damage under fault conditions like short circuits or excessive power dissipation.

The MCP1804T-3302I/MT offers excellent line and load regulation, ensuring a stable 3.3V output despite fluctuations in the input voltage or changes in the current drawn by the load. With an operating input voltage range from 2.7V to 6.0V, it is compatible with a variety of power sources, including multi-cell alkaline batteries, single-cell lithium-ion/LiPo batteries, and regulated 5V supplies.

ICGOOODFIND: The Microchip MCP1804T-3302I/MT stands out as a highly efficient and compact power management solution. Its combination of ultra-low quiescent current, low dropout voltage, and robust protection features makes it an ideal choice for extending battery life in portable, always-on, and wireless applications such as IoT sensors, wearables, and handheld medical devices.

Keywords:

Low Dropout Voltage

Low Quiescent Current

150 mA Output Current

Thermal Shutdown Protection

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