Microchip Technology TC1107-3.0VUA

Overview

TC1107-3.0VUA from Microchip Technology is a fixed-output, 3.0V CMOS low-dropout (LDO) linear regulator with shutdown control, delivering up to 300mA output current, ±0.5% output voltage accuracy, and ultra-low 50μA typical supply current. It features a 240mV typical dropout voltage at full load and integrated over-temperature and over-current protection, designed for battery-powered medical instruments and portable communication devices.

For engineers reviewing the TC1107-3.0VUA datasheet, TC1107-3.0VUA pinout, TC1107-3.0VUA application, or TC1107-3.0VUA equivalent, key selection criteria include its MSOP-8 package footprint, 0.05μA shutdown current, 40ppm/°C temperature coefficient, Bypass input for noise reduction, and compatibility with 1μF minimum output capacitance.

Technical Context

The TC1107-3.0VUA employs a CMOS-based regulation architecture-unlike legacy bipolar LDOs-ensuring supply current remains stable across load (0.1mA to 300mA) without increase, enabling precise RTC and CMOS RAM backup operation. Its reference bypass input accepts a 470pF capacitor to suppress internal reference noise, directly lowering output noise to 260nV/√Hz at 1kHz.

Shutdown is controlled via a CMOS-compatible SHDN pin with VIH ≥ 45% VIN and VIL ≤ 15% VIN; asserting low reduces supply current to 0.05μA and forces VOUT to zero. Thermal shutdown activates at 150°C, with automatic recovery at ~140°C, and stability is guaranteed with only 1μF ceramic or tantalum output capacitance.

Key Specifications

Pinout & Package

TC1107-3.0VUA is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 0.95mm body, 0.65mm pitch), optimized for space-constrained portable designs. Pin 1 is marked by a beveled corner; thermal performance is enhanced by PCB copper pour under the exposed pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-3002E/TO, TC1107-3.0VUA delivers 20× higher output current and integrated noise suppression; versus NCP1117ST30T3G, it reduces quiescent current by 120× and adds programmable shutdown-making it uniquely suited for space- and energy-constrained portable electronics.

Availability

TC1107-3.0VUA is available at Aetrix Electronics and suitable for battery-operated systems, portable medical instrumentation, and GSM/PHS handset designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TC1107-3.0VUA 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs, with ISO/TS-16949 certified wafer fabrication and packaging facilities.

The TC1107 series was designed as a CMOS-based upgrade to legacy bipolar LDOs-targeting portable, battery-critical applications demanding ultra-low IQ, high accuracy, and minimal external components.

FAQ

What is the minimum input voltage required for TC1107-3.0VUA to regulate at full 300mA load?

The TC1107-3.0VUA requires VIN ≥ VOUT + dropout voltage. With a maximum dropout of 270mV at 300mA, the minimum input is 3.27V. However, the absolute minimum specified VIN is 2.7V-so operation below 3.27V is only possible at reduced load. For guaranteed 300mA regulation, maintain VIN ≥ 3.27V. The TC1107-3.0VUA datasheet confirms this in Note 7 of the Electrical Characteristics table.

Can TC1107-3.0VUA operate without the Bypass capacitor, and what is the impact on noise performance?

Yes, TC1107-3.0VUA functions normally without the 470pF Bypass capacitor-it is optional. Omitting it increases output noise from 260nV/√Hz to approximately 400–500nV/√Hz at 1kHz, as measured in typical characterization data. The TC1107-3.0VUA Bypass pin is internally connected to the reference node; adding the capacitor shunts high-frequency reference noise, directly improving PSRR and time-domain stability in noise-critical analog stages.

Is TC1107-3.0VUA compatible with ceramic output capacitors, and what ESR range is acceptable?

Yes, TC1107-3.0VUA is fully compatible with ceramic output capacitors. The datasheet specifies stability with ≥1μF capacitance and ESR between 0.1Ω and 5.0Ω-well within the typical 1–20mΩ range of X5R/X7R ceramics. Unlike many older LDOs, TC1107-3.0VUA does not require minimum ESR, eliminating the need for lossy tantalum or aluminum electrolytics and simplifying layout. This is confirmed in Section 3.1 "Output Capacitor" of the DS21356C datasheet.

How does the shutdown functionality of TC1107-3.0VUA behave during power-up and brown-out conditions?

TC1107-3.0VUA enters shutdown only when SHDN is actively driven ≤15% VIN. During power-up, if SHDN is tied to VIN (common practice), the device enables as soon as VIN exceeds ~2.7V. Under brown-out, regulation holds until VIN drops below the dropout threshold-but SHDN must be externally held high to avoid premature disable. The TC1107-3.0VUA does not include built-in undervoltage lockout on SHDN; external logic or supervisor ICs are required for coordinated sequencing.

What is the thermal resistance (θJA) of the TC1107-3.0VUA in its MSOP-8 package, and how does it affect maximum power dissipation?

The TC1107-3.0VUA in the 8-pin MSOP package has a θJA of approximately 200°C/W, as stated in Section 4.2 of the datasheet. At TA = 55°C and TJMAX = 125°C, maximum allowable power dissipation is (125–55)/200 = 350mW. For example, at VIN = 4.0V and IOUT = 300mA, PD ≈ (4.0–3.0) × 0.3 = 300mW-within safe limits. Exceeding this requires thermal relief (copper pour, airflow) or derating. This value is specific to TC1107-3.0VUA's MSOP variant and differs from the SOIC version's 160°C/W.