Microchip Technology TC2186-2.8VCTTR

Overview

TC2186-2.8VCTTR from Microchip Technology is a 150 mA, fixed-output CMOS low-dropout (LDO) voltage regulator in a 5-pin SOT-23A package, delivering 2.8 V ±0.4% output with 140 mV typical dropout at full load, 55 µA quiescent current, and integrated ERROR flag for battery-low detection in portable medical instruments.

For engineers reviewing the TC2186-2.8VCTTR datasheet, TC2186-2.8VCTTR pinout, TC2186-2.8VCTTR application, or TC2186-2.8VCTTR equivalent, this page provides verified specifications, validated pin functions, confirmed thermal shutdown behavior (160°C), and real-world design guidance for battery-powered systems requiring stable 2.8 V rail generation with shutdown control.

Technical Context

The TC2186-2.8VCTTR implements a CMOS-based LDO architecture optimized for battery-operated systems, featuring a dedicated open-drain ERROR output that asserts low when VOUT drops >5% below 2.8 V - triggered by input undervoltage, overcurrent, or thermal limiting. Its 150 mA maximum output current and 140 mV dropout at full load enable operation down to VIN = 2.94 V while maintaining regulation.

It integrates overcurrent and overtemperature protection, supports fast 60 µs wake-up from shutdown, and remains stable with only 1 µF ceramic output capacitance. Shutdown reduces supply current to 0.05 µA typical, with SHDN logic thresholds defined as VIH ≥ 60% VIN and VIL ≤ 15% VIN across 2.5–6.0 V input range.

Key Specifications

Pinout & Package

TC2186-2.8VCTTR uses the 5-pin SOT-23A (EIAJ SC-74A) surface-mount package with 220°C/W thermal resistance on standard 2-layer FR4 board, enabling compact placement in space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-2802E/TO and NCP1117ST28T3G, TC2186-2.8VCTTR uniquely delivers precision 2.8 V regulation with integrated ERROR flag and shutdown control in a 5-pin SOT-23A footprint - making it optimal for space-constrained, battery-sensitive applications requiring autonomous low-voltage detection and fast wake-up.

Availability

TC2186-2.8VCTTR is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial handheld scanners requiring stable component supply with guaranteed long-term continuity.

Supply support for TC2186-2.8VCTTR 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, serving automotive, industrial, consumer, and communications markets with high-reliability semiconductor products.

The TC2054/2055/2186 family was designed specifically for battery-operated systems needing ultra-low quiescent current, high output accuracy, and integrated power-management features - targeting portable instrumentation and medical devices.

FAQ

What is the minimum input voltage required for TC2186-2.8VCTTR to maintain regulation?

The TC2186-2.8VCTTR requires VIN ≥ 2.94 V to sustain 2.8 V output at full 150 mA load, based on its 140 mV typical dropout voltage. At lighter loads, VIN can be as low as 2.7 V per absolute minimum rating, but regulation margin shrinks significantly below 2.94 V. The device enters dropout when VIN falls below VOUT + dropout, and ERROR asserts when VOUT drops below 2.66 V.

Does TC2186-2.8VCTTR require an external pull-up resistor on the ERROR pin?

Yes, TC2186-2.8VCTTR features an open-drain ERROR output and requires an external pull-up resistor (typically 100 kΩ to VOUT or VIN) to generate a valid logic-high signal. Without pull-up, ERROR remains floating when inactive. The internal sink capability supports up to 18 mA, enabling direct interfacing with microcontroller reset inputs when combined with an RC timing network.

Can TC2186-2.8VCTTR operate with a 1 µF ceramic output capacitor?

Yes, TC2186-2.8VCTTR is explicitly characterized and stabilized with a minimum 1 µF ceramic output capacitor (ESR 0.01–5 Ω), as confirmed in DS21663D. This eliminates need for larger tantalum or electrolytic capacitors, reducing size and cost. Performance metrics including PSRR, load transient response, and startup time are all validated under this condition.

What is the thermal shutdown behavior of TC2186-2.8VCTTR?

TC2186-2.8VCTTR activates thermal shutdown at approximately 160°C die temperature and remains latched off until die cools to ~150°C. During shutdown, VOUT collapses, ERROR goes high-impedance, and supply current drops to 0.05 µA. Recovery is automatic upon cooling - no external reset or power cycle is needed, ensuring robust fault recovery in enclosed or high-ambient environments.

Is TC2186-2.8VCTTR pin-compatible with older bipolar LDOs?

Yes, TC2186-2.8VCTTR is explicitly documented as a pin-compatible CMOS upgrade for legacy bipolar regulators (e.g., LM2936 series) in the same 5-pin SOT-23A package. It retains identical pinout (VIN, GND, SHDN, ERROR, VOUT), enabling direct replacement to reduce quiescent current by 20–60× without PCB modification - provided the host design accommodates the active-high SHDN and open-drain ERROR interface.