Microchip Technology TC2055-2.85VCTTR

Overview

TC2055-2.85VCTTR from Microchip Technology is a 100 mA, 2.85 V fixed-output CMOS low-dropout (LDO) regulator in a 5-pin SOT-23A package, featuring ±0.4% output voltage accuracy, 90 mV typical dropout at full load, and integrated ERROR flag for out-of-regulation detection. It delivers ultra-low 55 µA quiescent current and operates across –40°C to +125°C for battery-powered medical instruments and portable communications devices.

For engineers reviewing the TC2055-2.85VCTTR datasheet, TC2055-2.85VCTTR pinout, TC2055-2.85VCTTR application, or TC2055-2.85VCTTR equivalent, key selection criteria include its 2.85 V output precision, fast 60 µs shutdown wake-up time, open-drain ERROR output usable as low-battery detector or reset generator, and compatibility with 1 µF ceramic output capacitors without external compensation.

Technical Context

The TC2055-2.85VCTTR implements a CMOS-based LDO architecture optimized for battery-operated systems, replacing legacy bipolar regulators with 20–60× lower supply current. Its regulation loop maintains stable 2.85 V output from 2.7 V input up to 6.0 V, with load regulation of ±0.33% across 0.1 mA to 100 mA.

Shutdown control (SHDN) reduces supply current to 0.05 µA typical while disabling VOUT and tri-stating ERROR; the open-drain ERROR pin asserts low when VOUT drops >5% below nominal, with 50 mV hysteresis referenced to 2.85 V. Thermal shutdown activates at ~160°C die temperature.

Key Specifications

Pinout & Package

Package: 5-pin SOT-23A (EIAJ SC-74A), surface-mount, 2.9 mm × 1.6 mm footprint, θ_JA = 255°C/W on standard FR4 PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-285T50 and TPS7A20285PDBVR, the TC2055-2.85VCTTR uniquely balances 100 mA drive, diagnostic ERROR output, and sub-100 mV dropout-making it optimal for space-constrained, battery-critical systems requiring both performance and system-level fault awareness.

Availability

TC2055-2.85VCTTR is available at Aetrix Electronics and suitable for portable medical sensors, cellular handsets, industrial data loggers, and wearable health trackers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TC2055-2.85VCTTR 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 TC2055-2.85VCTTR belongs to Microchip's precision CMOS LDO family designed specifically for battery-operated systems demanding ultra-low quiescent current, tight output voltage accuracy, and integrated power-good signaling.

FAQ

What is the maximum input voltage rating for the TC2055-2.85VCTTR?

The TC2055-2.85VCTTR has an absolute maximum input voltage of 6.5 V. Its recommended operating input voltage range is 2.7 V to 6.0 V. Exceeding 6.5 V may cause permanent damage. The minimum input must satisfy both VIN ≥ 2.7 V and VIN ≥ VOUT + dropout voltage (≥2.94 V at 100 mA), making 2.94 V the practical lower bound for full-load operation.

Does the TC2055-2.85VCTTR require an external pull-up resistor on the ERROR pin?

Yes, the TC2055-2.85VCTTR ERROR pin is open-drain and requires an external pull-up resistor to function. A typical value is 100 kΩ tied to VOUT or VIN. This configuration enables the ERROR signal to drive microcontroller reset inputs or low-battery interrupt lines. Without the pull-up, the ERROR pin cannot assert a valid high logic level.

Can the TC2055-2.85VCTTR operate with a 1 µF ceramic output capacitor?

Yes, the TC2055-2.85VCTTR is explicitly specified to be stable with a minimum 1 µF ceramic output capacitor having ESR between 0.05 Ω and 5 Ω. This eliminates the need for larger or more expensive tantalum/electrolytic capacitors, reducing cost and board space. Performance curves in DS21663D confirm stability and transient response with this configuration.

What is the shutdown current consumption of the TC2055-2.85VCTTR?

The TC2055-2.85VCTTR draws a maximum of 0.5 µA shutdown supply current, with a typical value of 0.05 µA. This ultra-low current is achieved when the SHDN pin is driven logic-low (<15% VIN), causing VOUT to fall to zero and the ERROR pin to become high-impedance. This makes the TC2055-2.85VCTTR ideal for battery-backed systems requiring multi-year standby life.

How does the ERROR output of the TC2055-2.85VCTTR behave during thermal shutdown?

During thermal shutdown, the TC2055-2.85VCTTR ERROR output goes low, indicating the device is out of regulation due to excessive die temperature. The ERROR pin remains asserted low until VOUT recovers to within 5% of 2.85 V (i.e., above 2.708 V) and hysteresis (50 mV) is satisfied. This behavior provides unambiguous fault signaling for system-level thermal management and safe recovery sequencing.