Microchip Technology TC1269-3.0VUA

Overview

TC1269-3.0VUA from Microchip Technology is a fixed-output, high-accuracy (±0.5%) CMOS low-dropout linear regulator delivering 3.0V at up to 300mA. It features ultra-low ground current (50µA typical at full load), 240mV dropout at 300mA, and integrated shutdown control with 0.05µA quiescent current in disable mode-designed for battery-powered instrumentation and portable communication devices.

For engineers reviewing the TC1269-3.0VUA datasheet, TC1269-3.0VUA pinout, TC1269-3.0VUA application, or TC1269-3.0VUA equivalent, key selection criteria include output voltage accuracy, thermal shutdown behavior, Bypass input noise reduction capability, and MSOP-8 package compatibility with space-constrained PCB layouts.

Technical Context

The TC1269-3.0VUA uses a CMOS pass element to achieve stable regulation without increasing supply current under load-unlike legacy bipolar LDOs. Its internal reference is bypassable via an external 470pF capacitor to reduce output noise to 260nV/√Hz at 1kHz.

It incorporates dual protection: over-current limiting (550–650mA short-circuit current) and thermal shutdown triggered at 150°C, with automatic recovery at ~140°C. Stability requires only a 1µF output capacitor with ESR between 0.1Ω and 5.0Ω.

Key Specifications

Pinout & Package

TC1269-3.0VUA is housed in an 8-pin MSOP package (3.0mm × 3.0mm, 0.65mm pitch), optimized for compact, thermally efficient layouts with exposed pad not present. Thermal resistance θ_JA is 200°C/W per datasheet layout guidance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-3002E/TO and TCS2103-3.0V, the TC1269-3.0VUA uniquely combines ±0.5% accuracy, Bypass-enabled ultra-low noise, thermal shutdown, and 240mV dropout in MSOP-8-making it optimal for battery-powered instrumentation requiring both precision and robustness.

Availability

TC1269-3.0VUA is available at Aetrix Electronics and suitable for battery-operated medical instruments, portable cellular handsets, digital camera sensor biasing, and linear post-regulation of SMPS outputs requiring stable component supply across industrial temperature ranges.

Supply support for TC1269-3.0VUA 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 company specializing in microcontrollers, analog devices, and power management ICs, with ISO/TS-16949 certified manufacturing.

The TC1269 series was designed as a CMOS-based upgrade to legacy bipolar LDOs-targeting portable, battery-sensitive applications demanding low quiescent current, high accuracy, and small-footprint packaging.

FAQ

What is the maximum input voltage rating for TC1269-3.0VUA?

The absolute maximum input voltage for TC1269-3.0VUA is 6.5V, but the recommended operating range is up to 6.0V per Electrical Characteristics table. Exceeding 6.0V risks violating safe operating area limits and may trigger thermal shutdown or degrade long-term reliability. Always maintain VIN ≤ VOUT + 3.0V for optimal dropout margin and thermal performance in the TC1269-3.0VUA.

Does TC1269-3.0VUA require an external capacitor on the Bypass pin?

No, the Bypass pin (Pin 5) of TC1269-3.0VUA is optional: connecting a 470pF capacitor to ground reduces output noise by suppressing reference voltage fluctuations, but leaving it unconnected still yields functional regulation. The TC1269-3.0VUA operates correctly without it-only add the capacitor when sub-µV noise performance is critical, such as in precision ADC or RF bias applications.

What is the thermal shutdown threshold for TC1269-3.0VUA?

The TC1269-3.0VUA enters thermal shutdown at a junction temperature of approximately 150°C and resumes normal operation once the die cools to ~140°C. This hysteresis prevents oscillation near the trip point. The shutdown behavior is fully internal-no external components or configuration are needed. For sustained high-load operation, ensure adequate PCB copper area and trace width to maintain θ_JA ≤200°C/W as specified for the TC1269-3.0VUA.

Can TC1269-3.0VUA be used with ceramic output capacitors?

Yes, TC1269-3.0VUA is stable with ceramic output capacitors ≥1µF, provided their effective series resistance (ESR) is between 0.1Ω and 5.0Ω and resonant frequency exceeds 1MHz. X7R or X5R dielectrics are recommended. Avoid ultra-low-ESR ceramics (<0.1Ω) unless verified with transient testing, as they may induce instability. The TC1269-3.0VUA datasheet explicitly validates 1µF ceramic use-confirming compatibility beyond traditional tantalum requirements.

How does shutdown functionality work on TC1269-3.0VUA?

The SHDN pin (Pin 7) of TC1269-3.0VUA is active-high: applying ≥45% of VIN enables regulation, while ≤15% of VIN forces shutdown-reducing supply current to 0.05µA typical and pulling VOUT to 0V. It accepts direct connection to CMOS GPIO or open-drain logic with pull-up. If unused, tie SHDN to VIN. This behavior is fully characterized across -40°C to +125°C and forms a core part of the TC1269-3.0VUA's low-power system architecture.