Microchip Technology TC1269-3.0VUATR

Overview

TC1269-3.0VUATR 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), very low dropout voltage (240mV at 300mA), and integrated shutdown control with 0.05µA standby current. It serves as a precision post-regulator in battery-powered portable electronics requiring stable, low-noise power.

For engineers reviewing the TC1269-3.0VUATR datasheet, TC1269-3.0VUATR pinout, TC1269-3.0VUATR application, or TC1269-3.0VUATR equivalent, key selection criteria include output accuracy over temperature (40 ppm/°C), PSRR of 50dB at ≤120Hz, Bypass input for noise reduction, thermal/overcurrent protection, and MSOP-8 compatibility with 1µF minimum output capacitance.

Technical Context

The TC1269-3.0VUATR implements a CMOS-based LDO architecture optimized for low quiescent current and fast transient response, replacing legacy bipolar regulators with 20–60× lower supply current. Its internal reference is bypassable via an external 470pF capacitor to reduce output noise to 260nV/√Hz at 1kHz.

It operates across -40°C to +125°C junction temperature, maintains regulation from 0.1mA to 300mA load, and incorporates thermal shutdown (150°C trip) and foldback current limiting. Shutdown is asserted by pulling SHDN below 15% VIN, reducing VOUT to zero and ISS to 0.05µA.

Key Specifications

Pinout & Package

TC1269-3.0VUATR is housed in an 8-pin MSOP package (3.0mm × 3.0mm, 0.65mm pitch), optimized for space-constrained PCB layouts and thermal performance via lead conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-3002E/TO and TPS7A2030PDBVR, TC1269-3.0VUATR uniquely combines Bypass-enabled ultra-low noise (260nV/√Hz), shutdown control with zero-VOUT behavior, and industrial-temp MSOP packaging - making it optimal for noise-sensitive, battery-critical portable instrumentation where both precision and power-state control are required.

Availability

TC1269-3.0VUATR is available at Aetrix Electronics and suitable for battery-operated medical devices, portable communication terminals, and industrial portable instruments requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for TC1269-3.0VUATR 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The TC1269 product line delivers high-accuracy, low-quiescent-current CMOS LDO regulators targeting portable, battery-sensitive, and industrial applications where precision voltage regulation and extended runtime are essential.

FAQ

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

The absolute maximum input voltage for TC1269-3.0VUATR is 6.5V, but the recommended operating range is up to 6.0V per the Electrical Specifications table. Exceeding 6.0V may compromise long-term reliability or trigger internal protection circuits. Always maintain at least 240mV headroom above 3.0V output to ensure regulation, especially under full 300mA load. The TC1269-3.0VUATR datasheet specifies 6.0V as the upper limit for normal operation.

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

No, the Bypass pin on TC1269-3.0VUATR is optional: connecting a 470pF capacitor to ground reduces output noise to 260nV/√Hz, but leaving it unconnected still yields functional regulation. Larger capacitors increase startup time to rated output voltage. The TC1269-3.0VUATR achieves full specification compliance without the Bypass capacitor, though noise-sensitive applications (e.g., precision ADCs) benefit from its use.

What happens to the output voltage of TC1269-3.0VUATR during shutdown?

When the SHDN pin is driven low (≤15% VIN), TC1269-3.0VUATR enters full shutdown: VOUT falls to 0V, and supply current drops to 0.05µA typical. This zero-output behavior isolates downstream circuitry and eliminates standby power loss - critical for battery-backed RTCs or memory retention systems. The TC1269-3.0VUATR does not enter high-impedance state; instead, it actively pulls VOUT to ground via internal discharge.

Can TC1269-3.0VUATR operate with a 1µF ceramic output capacitor?

Yes, TC1269-3.0VUATR is explicitly characterized and stabilized with a minimum 1µF ceramic or tantalum output capacitor, as confirmed in the General Description and Output Capacitor section. The device's internal compensation eliminates need for ESR tuning, supporting low-ESR ceramics without oscillation risk. Using <1µF violates stability requirements and may cause regulation failure or excessive noise. The TC1269-3.0VUATR datasheet mandates ≥1µF for guaranteed performance.

Is TC1269-3.0VUATR compatible with lead-free reflow soldering processes?

Yes, TC1269-3.0VUATR is manufactured in RoHS-compliant, lead-free MSOP packages and qualified for standard Pb-free reflow profiles (J-STD-020). Its maximum peak reflow temperature is 260°C, and moisture sensitivity level (MSL) is 1 - meaning unlimited floor life at ≤30°C/60% RH. No special baking or handling is required prior to assembly. The TC1269-3.0VUATR meets JEDEC standards for lead-free manufacturing and is fully compatible with modern SMT lines.