Microchip Technology TC1108-3.0VDBTR

Overview

TC1108-3.0VDBTR from Microchip Technology is a fixed-output, CMOS low dropout (LDO) voltage regulator delivering 3.0V at up to 300mA with ±0.5% output accuracy, 50μA typical supply current, and 240mV typical dropout voltage at full load. It serves as a precision post-regulator in battery-powered portable electronics requiring stable low-noise power.

For engineers reviewing the TC1108-3.0VDBTR datasheet, TC1108-3.0VDBTR pinout, TC1108-3.0VDBTR application, or TC1108-3.0VDBTR equivalent, key selection criteria include ultra-low quiescent current for extended battery life, thermal/overcurrent protection for reliability in compact systems, and 1μF minimum output capacitance for space-constrained designs.

Technical Context

The TC1108-3.0VDBTR uses a CMOS pass element enabling constant 50μA supply current across 0–300mA load range-unlike bipolar regulators whose bias current rises with load. Its internal reference and error amplifier deliver ±0.5% initial output accuracy and 40ppm/°C temperature coefficient.

Dropout voltage is specified at 240mV (max) under 300mA load, with fast transient response enabled by stability with only 1μF ceramic output capacitor. Protection includes thermal shutdown at 150°C and foldback overcurrent limiting with 550–650mA short-circuit current.

Key Specifications

Pinout & Package

TC1108-3.0VDBTR is housed in a 3-pin SOT-223 package with exposed tab (thermal pad) connected to GND. The package provides 45°C/W junction-to-air thermal resistance with 2500 mm² copper area, supporting continuous 300mA operation at ambient ≤95°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MCP1700-3002E/TO and TPS76330QDBVRQ1, TC1108-3.0VDBTR uniquely balances 300mA output, ±0.5% accuracy, 240mV dropout, and 50μA quiescent current-making it optimal for portable instrumentation and medical devices where all four parameters constrain design.

Availability

TC1108-3.0VDBTR is available at Aetrix Electronics and suitable for portable medical instruments, GSM/PHS handsets, and linear post-regulation in SMPS designs requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for TC1108-3.0VDBTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog, and mixed-signal ICs, with expertise in low-power, high-reliability semiconductor solutions for embedded systems.

The TC1108 series belongs to Microchip's precision CMOS LDO family, designed specifically for battery-operated and noise-sensitive applications demanding ultra-low IQ, high accuracy, and robust thermal protection.

FAQ

What is the minimum input voltage required for TC1108-3.0VDBTR to regulate at 3.0V output?

The TC1108-3.0VDBTR requires VIN ≥ 2.7V per datasheet absolute minimum, but practical regulation demands VIN ≥ VOUT + dropout. At 300mA load, dropout is up to 480mV, so VIN must be ≥ 3.48V to maintain 3.0V output. For guaranteed operation across temperature and process variation, VIN ≥ 3.6V is recommended. TC1108-3.0VDBTR achieves this while consuming only 50μA quiescent current.

Can TC1108-3.0VDBTR operate with a 1μF ceramic output capacitor?

Yes, TC1108-3.0VDBTR is explicitly characterized for stability with a 1μF output capacitor (minimum), and the datasheet confirms compatibility with ceramic types meeting ESR requirements of 0.1–5.0Ω. This eliminates need for larger, more expensive tantalum capacitors and reduces PCB footprint. TC1108-3.0VDBTR's CMOS architecture enables this low-capacitance stability unlike many bipolar LDOs.

Does TC1108-3.0VDBTR include overtemperature protection?

Yes, TC1108-3.0VDBTR incorporates integrated thermal shutdown that disables the output when junction temperature exceeds 150°C. Operation resumes automatically once die temperature falls to approximately 140°C. This protection is independent of load current and operates under all input/output conditions, ensuring robustness in enclosed or high-ambient environments. TC1108-3.0VDBTR's SOT-223 package relies on this feature for safe 300mA operation.

What is the output voltage accuracy specification for TC1108-3.0VDBTR across temperature?

TC1108-3.0VDBTR guarantees ±0.5% initial output voltage accuracy at 25°C, with a temperature coefficient of 40ppm/°C. Over the full –40°C to +125°C range, total output deviation remains within ±1.2% (including initial tolerance and tempco), verified by statistical characterization. This level of stability supports precision RTCs and sensor interfaces without external calibration. TC1108-3.0VDBTR achieves this while maintaining 50μA supply current.

Is TC1108-3.0VDBTR compatible with lead-free reflow soldering processes?

Yes, TC1108-3.0VDBTR in SOT-223 package is rated for standard lead-free reflow profiles per JEDEC J-STD-020, with peak temperature up to 260°C. The device's plastic package and internal construction meet RoHS and REACH requirements. Microchip's packaging documentation confirms moisture sensitivity level (MSL) 1 for this variant, meaning unlimited floor life before reflow. TC1108-3.0VDBTR is fully qualified for modern high-volume assembly lines.