My Inquiry
My Account
Microchip Technology TC2185-2.85VCTTR
- Part No.:
- TC2185-2.85VCTTR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TC2185-2.85VCTTR.pdf
- Description:
- IC REG LIN 2.85V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,287
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TC2185-2.85VCTTR from Microchip Technology is a 150 mA, fixed-output CMOS low-dropout (LDO) voltage regulator with shutdown control and reference bypass input, delivering ±0.4% output voltage accuracy at 2.85 V, 140 mV typical dropout at full load, and 80 µA maximum supply current. It operates across –40°C to +125°C and targets battery-powered medical instruments and portable computing systems requiring ultra-low-noise, stable post-regulation.
For engineers reviewing the TC2185-2.85VCTTR datasheet, TC2185-2.85VCTTR pinout, TC2185-2.85VCTTR application, or TC2185-2.85VCTTR equivalent, key selection criteria include verified 150 mA output capability, SOT-23A package thermal resistance (255°C/W), fast 60 µs wake-up response, and confirmed compatibility with 1 µF ceramic output capacitance without external compensation.
Technical Context
The TC2185-2.85VCTTR implements a CMOS-based LDO architecture optimized for low quiescent current and high PSRR-achieving 55 dB rejection below 1 kHz when paired with a 0.01 µF bypass capacitor. Its internal reference bypass input enables ultra-low-noise operation (200 nV/√Hz at 10 kHz) and supports precision regulation under dynamic load transients.
Unlike bipolar LDOs, it maintains constant 55 µA typical supply current independent of load, features integrated overcurrent and overtemperature protection (trip at ~160°C), and achieves stable regulation with minimal 1 µF output capacitance-eliminating need for ESR tuning or large bulk capacitors in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85 V with ±0.4% typical accuracy-ensures tight tolerance for sensitive analog rails and microcontroller I/O domains. |
| Max Output Current | 150 mA-supports moderate-power peripherals such as RF front-ends or sensor signal chains without thermal derating at ambient ≤55°C. |
| Dropout Voltage | 140 mV typical at 150 mA-enables operation from 3.0 V input while maintaining 2.85 V output, critical for single-cell Li-ion or Li-poly systems. |
| Supply Current | 80 µA max (55 µA typ)-reduces standby power loss by >20× versus legacy bipolar regulators, extending battery life in always-on monitoring devices. |
| Shutdown Current | 0.5 µA max-allows deep-sleep modes in portable instrumentation where µA-level leakage directly impacts runtime. |
| PSRR | 55 dB @ ≤1 kHz with 0.01 µF bypass-suppresses switching noise from upstream DC/DC converters in mixed-signal PCB layouts. |
| Operating Temp | –40°C to +125°C junction-validated for automotive cabin modules and industrial edge sensors exposed to wide thermal cycling. |
Pinout & Package
TC2185-2.85VCTTR is housed in a 5-pin SOT-23A (EIAJ SC-74A) package with 255°C/W junction-to-air thermal resistance, designed for surface-mount assembly on 2-layer FR4 boards with ground-plane copper pour to enhance thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Unregulated input supply | Accepts 2.7–6.0 V input; requires ≥1 µF ceramic decoupling close to pin to suppress high-frequency noise and support transient response. |
| GND (Pin 2) | Ground reference | Common return for input/output capacitors and bypass network; must be low-impedance path to minimize ground bounce during load steps. |
| SHDN (Pin 3) | Active-high enable control | Logic-high (>60% VIN) enables regulation; logic-low (<15% VIN) forces shutdown with <0.5 µA quiescent draw and zero VOUT. |
| Bypass (Pin 4) | Reference voltage filter node | Connects optional 470 pF–0.01 µF ceramic capacitor to GND to reduce output noise and improve PSRR-critical for ADC reference or RF bias rails. |
| VOUT (Pin 5) | Regulated output | Delivers stable 2.85 V; requires ≥1 µF ceramic output capacitor with ESR 0.01–5 Ω to ensure stability across temperature and load range. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise operation | 200 nV/√Hz output noise at 10 kHz with 470 pF bypass-enables clean power for precision op-amps and SAR ADCs without additional filtering. |
| Fast wake-up from shutdown | 60 µs typical time to reach 95% of 2.85 V after SHDN assertion-supports rapid subsystem activation in duty-cycled IoT endpoints. |
| Thermal shutdown protection | Auto-shutdown at ~160°C junction temperature with hysteresis (~10°C)-prevents permanent damage during sustained overload or poor heatsinking. |
| Wide-input compatibility | Operates down to 2.7 V input while regulating 2.85 V-allows direct use with single-cell Li-ion (2.7–4.2 V) without pre-regulation stage. |
| Load regulation stability | ±0.43% variation from 0.1 mA to 150 mA load-maintains rail integrity across sleep-to-active transitions in microcontroller-based systems. |
Applications
| Battery-Powered Medical Sensors | Portable Diagnostic Handhelds |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE radio and analog front-end amplifying electrochemical signals. IC Role / Device Role / Timing Role: Primary 2.85 V analog supply for op-amp signal conditioning and ADC reference, powered from coin-cell or rechargeable Li-poly. Use Value: ±0.4% output accuracy ensures consistent sensor calibration; 200 nV/√Hz noise prevents baseline drift in µV-level measurements. | Use Scenario: Handheld ECG device with real-time waveform display, touch interface, and USB charging. IC Role / Device Role / Timing Role: Post-regulator for SMPS-derived 3.3 V rail, generating clean 2.85 V for microcontroller I/O and display driver logic. Use Value: 140 mV dropout allows operation down to 3.0 V input during battery discharge; 60 µs wake-up synchronizes with touch-interrupt latency. |
| Industrial Wireless Sensor Nodes | Automotive Cabin Temperature Modules |
Use Scenario: LoRaWAN-enabled temperature/humidity node deployed in unheated warehouses with 10-year battery life target. IC Role / Device Role / Timing Role: Always-on 2.85 V supply for ultra-low-power MCU and digital sensor interface, entering shutdown between transmissions. Use Value: 0.5 µA shutdown current minimizes self-discharge; –40°C to +125°C rating ensures reliability across seasonal extremes. | Use Scenario: HVAC control module mounted near dashboard vents, exposed to rapid ambient shifts from –40°C cold soak to +85°C solar loading. IC Role / Device Role / Timing Role: Stable 2.85 V rail for thermistor ADC reference and CAN transceiver logic, sourced from vehicle 12 V via buck converter. Use Value: 55 dB PSRR rejects switching noise from DC/DC; thermal shutdown protects against localized hot-spot failures near vents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-285T50I/OT | 150 mA max, 6 µA quiescent current, no bypass pin, 220 mV dropout at 150 mA | Lacks reference bypass input-unsuitable for ultra-low-noise analog rails requiring <250 nV/√Hz | Select when lowest possible quiescent current dominates over noise performance and bypass flexibility. |
| TPS7A05285PDBVR | 200 mA max, 25 µA quiescent, no bypass pin, 175 mV dropout at 200 mA, integrated thermal foldback | Higher dropout and no bypass option limit use in low-VIN or precision analog applications | Prefer for higher-current digital loads where 2.85 V rail stability under 200 mA is primary requirement. |
Compared with MCP1700-285T50I/OT and TPS7A05285PDBVR, TC2185-2.85VCTTR uniquely delivers both 150 mA output and dedicated bypass pin for sub-250 nV/√Hz noise-making it the only choice among the three for noise-sensitive analog subsystems powered from marginal input voltages.
Availability
TC2185-2.85VCTTR is available at Aetrix Electronics and suitable for battery-operated medical instruments, portable diagnostic handhelds, and industrial wireless sensor nodes requiring stable component supply with guaranteed long-term availability and traceable lot history.
Supply support for TC2185-2.85VCTTR 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 microcontrollers, analog components, and Flash-IP solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.
The TC2014/2015/2185 family was designed as CMOS-based LDO upgrades to bipolar regulators-targeting ultra-low-power, low-noise, and high-accuracy applications in portable and harsh-environment electronics where supply current, dropout, and thermal robustness are critical.
FAQ
What is the maximum input voltage rating for TC2185-2.85VCTTR?
The TC2185-2.85VCTTR has an absolute maximum input voltage of 7.0 V, as specified in the Electrical Characteristics table. Operation above this level risks permanent damage. For reliable long-term use, the recommended operating input range is 2.7 V to 6.0 V-ensuring proper regulation of the 2.85 V output while maintaining 140 mV typical dropout margin at full 150 mA load. This range aligns with common single-cell Li-ion and Li-poly battery profiles.
Does TC2185-2.85VCTTR require an external bypass capacitor for basic operation?
No, TC2185-2.85VCTTR functions correctly without an external bypass capacitor on the Bypass pin. The 0.01 µF ceramic capacitor is optional and used only to achieve ultra-low-noise performance (200 nV/√Hz) and improved PSRR. If noise sensitivity is not critical-as in digital-only power domains-the Bypass pin may be left floating or tied to GND. However, omitting it forfeits the key low-noise advantage that distinguishes TC2185-2.85VCTTR from standard LDOs.
Can TC2185-2.85VCTTR be used with ceramic output capacitors smaller than 1 µF?
No, TC2185-2.85VCTTR requires a minimum 1 µF ceramic output capacitor connected from VOUT to GND for guaranteed stability across its full operating range. The datasheet explicitly states this as a design requirement-not a recommendation-and confirms stability with 1 µF X5R/X7R ceramics. Using smaller values risks oscillation or poor transient response, especially under load steps up to 150 mA. Larger values (e.g., 10 µF) are acceptable and improve transient suppression.
What is the thermal shutdown behavior of TC2185-2.85VCTTR?
TC2185-2.85VCTTR incorporates integrated thermal protection that disables regulation when junction temperature exceeds approximately 160°C. The device remains latched off until die temperature cools to ~150°C, providing hysteresis to prevent cycling. This behavior is fully characterized and tested-unlike some LDOs with unspecified thermal response-making TC2185-2.85VCTTR suitable for sealed enclosures or high-ambient environments where passive cooling is limited, such as automotive cabin modules or industrial field sensors.
Is TC2185-2.85VCTTR pin-compatible with older bipolar LDOs like LP2980?
Yes, TC2185-2.85VCTTR is explicitly designed as a pin-compatible upgrade for bipolar LDOs including the LP2980, sharing identical 5-pin SOT-23A footprint and pinout (VIN, GND, SHDN, Bypass, VOUT). This allows drop-in replacement in existing designs to gain benefits of 20× lower quiescent current, lower dropout, and enhanced noise performance-without PCB layout changes. However, designers must verify that the Bypass pin connection (if added) does not conflict with legacy LP2980 board traces, which lack that node.
TC2185-2.85VCTTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.21V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- -
- PSRR:
- 55dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TC2185-2.85VCTTR FAQ
1.How can I place an order for TC2185-2.85VCTTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC2185-2.85VCTTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TC2185-2.85VCTTR reliable?
The price and inventory of TC2185-2.85VCTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC2185-2.85VCTTR is usually 5 days.
3.What payment methods are accepted for TC2185-2.85VCTTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC2185-2.85VCTTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC2185-2.85VCTTR?
TC2185-2.85VCTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC2185-2.85VCTTR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TC2185-2.85VCTTR?
For technical support, including TC2185-2.85VCTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC2185-2.85VCTTR requirements.
6.How does Aetrix verify that TC2185-2.85VCTTR is sourced from the original manufacturer or authorized distributors?
All TC2185-2.85VCTTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TC2185-2.85VCTTR meets industry standards.
7.What is the process for return or replacement of TC2185-2.85VCTTR?
All TC2185-2.85VCTTR units undergo pre-shipment inspection (PSI). If there is an issue with TC2185-2.85VCTTR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TC2185-2.85VCTTR part is unused and in its original packaging.
Return procedure for TC2185-2.85VCTTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TC2185-2.85VCTTR Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
