Microchip TC1108-3VDBTR 300 mA LDO Voltage Regulator Technical Overview

The Microchip TC1108-3VDBTR is a low-dropout (LDO) linear voltage regulator designed to deliver a fixed 3.3V output from an input voltage range of 2.7V to 6.0V, with a maximum output current of 300 mA. This device is engineered for applications requiring a stable, clean voltage supply with minimal noise and high power supply rejection.

A key feature of this LDO is its extremely low dropout voltage, typically 85 mV at 100 mA load. This allows the regulator to maintain a stable output even when the input voltage dips very close to the output level, which is critical for battery-powered applications where maximizing run-time is essential. Furthermore, the TC1108 boasts a low ground current of just 50 µA (typical), which significantly enhances efficiency, especially under light loads.

The regulator is designed for stability with a small, low-ESR ceramic output capacitor, typically 1.0 µF, reducing both the required board space and the overall bill of materials cost. It integrates vital protection features, including internal current limiting and thermal shutdown, safeguarding both the IC and the downstream circuitry from fault conditions.

Housed in a space-efficient SOT-23-5 package, the TC1108-3VDBTR is an ideal solution for power management in portable, battery-operated devices such as smartphones, wireless sensors, handheld meters, and other compact electronic systems where board real estate is at a premium.

ICGOOODFIND: The Microchip TC1108-3VDBTR stands out as a highly efficient and compact power management solution. Its combination of low dropout voltage, minimal quiescent current, and stability with ceramic capacitors makes it exceptionally well-suited for extending battery life in space-constrained portable applications.

Keywords: LDO Regulator, Low Dropout Voltage, 300 mA Output, Low Quiescent Current, SOT-23 Package.