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Microchip Technology TC2185-2.8VCTTR
- Part No.:
- TC2185-2.8VCTTR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TC2185-2.8VCTTR.pdf
- Description:
- IC REG LINEAR 2.8V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TC2185-2.8VCTTR 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% accuracy with 140 mV typical dropout at full load, 80 µA max supply current, and integrated shutdown control. It serves as a precision post-regulator in battery-powered medical instruments and portable communications devices.
For engineers reviewing the TC2185-2.8VCTTR datasheet, TC2185-2.8VCTTR pinout, TC2185-2.8VCTTR application, or TC2185-2.8VCTTR equivalent, key selection criteria include its 150 mA output capability, reference bypass input for ultra-low-noise operation, fast 60 µs wake-up from shutdown, overcurrent/overtemperature protection, and compatibility with 1 µF ceramic output capacitors.
Technical Context
The TC2185-2.8VCTTR implements a CMOS-based LDO architecture optimized for low quiescent current and high DC accuracy, replacing bipolar regulators like LP2980. Its internal reference bypass (Bypass pin) enables noise reduction via external 470 pF–0.01 µF capacitor, improving PSRR to 55 dB at ≤1 kHz.
It features active shutdown with 0.5 µA max supply current, logic-level SHDN input (VIH = 60% VIN, VIL = 15% VIN), and thermal shutdown at 160°C. Stability is guaranteed with 1 µF output capacitance (ESR 0.01–5 Ω), and it operates across –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8 V ±0.4% - ensures stable rail for sensitive analog or RF circuitry without external feedback |
| Max Output Current | 150 mA - supports moderate-power microcontrollers, sensors, or transceivers without derating |
| Dropout Voltage | 140 mV (typ.) @ 150 mA - enables regulation from 2.94 V input, critical for single-cell Li-ion or Li-poly systems |
| Supply Current | 80 µA (max) - reduces standby power loss in always-on subsystems |
| Shutdown Current | 0.5 µA (max) - extends battery life during deep sleep modes |
| PSRR | 55 dB @ ≤1 kHz - suppresses ripple from upstream SMPS in linear post-regulation applications |
| Thermal Shutdown | 160°C - protects against sustained overload or poor PCB thermal design |
Pinout & Package
Package: 5-Pin SOT-23A (EIAJ SC-74A), 2.95 mm × 1.63 mm × 1.18 mm body, with exposed pad not present; thermal resistance θJA = 255°C/W on standard FR4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Unregulated input supply | Accepts 2.7–6.0 V; requires ≥1 µF input capacitor if >10" trace length or battery source |
| 2 - GND | Ground reference | Common return for input/output capacitors and Bypass capacitor; must be low-impedance |
| 3 - SHDN | Active-high shutdown control | Drives regulator into 0.5 µA shutdown when ≤15% VIN; compatible with CMOS I/O or microcontroller GPIO |
| 4 - Bypass | Reference bypass input | Connects to 0.01 µF ceramic cap to ground to reduce output noise and improve PSRR |
| 5 - VOUT | Regulated 2.8 V output | Delivers up to 150 mA; requires ≥1 µF output capacitor with ESR 0.01–5 Ω |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise operation | Enabled by dedicated Bypass pin and 0.01 µF capacitor, reducing output noise to 200 nV/√Hz at 10 kHz |
| Fast wake-up response | 60 µs typical time for VOUT to reach 95% of 2.8 V after SHDN assertion, minimizing latency in power-gated systems |
| High DC accuracy | ±0.4% typical output voltage tolerance over –40°C to +125°C, eliminating need for external trimming |
| Robust protection suite | Integrated overcurrent limiting and thermal shutdown at 160°C prevent damage under fault conditions |
| Low-ESR capacitor compatibility | Stable with 1 µF ceramic (X5R/X7R) or tantalum output caps, simplifying layout and reducing BOM count |
Applications
| Battery-Powered Medical Instruments | Portable Cellular/GSM Phones |
|---|---|
Use Scenario: Powering low-noise analog front-ends and ADCs in handheld ECG or pulse oximetry units. IC Role / Device Role / Timing Role: Precision 2.8 V LDO providing clean, stable bias for signal conditioning circuits. Use Value: ±0.4% output accuracy and 200 nV/√Hz noise ensure measurement integrity without post-regulation filtering. | Use Scenario: Supplying RF transceiver ICs and baseband processors in compact GSM handsets. IC Role / Device Role / Timing Role: Linear post-regulator cleaning switching converter ripple before sensitive RF stages. Use Value: 55 dB PSRR at ≤1 kHz and 140 mV dropout enable efficient use of single-cell Li-ion (2.9–4.2 V) input range. |
| Linear Post-Regulator for SMPS | Instrumentation Signal Chains |
Use Scenario: Downstream regulation after a 3.3 V buck converter powering mixed-signal SoCs. IC Role / Device Role / Timing Role: Low-noise, low-dropout buffer isolating digital noise from analog subsystems. Use Value: Bypass pin support and 1 µF stability allow compact, low-cost decoupling versus discrete RC filters. | Use Scenario: Biasing precision op-amps, voltage references, and DACs in benchtop multimeters or data loggers. IC Role / Device Role / Timing Role: Fixed 2.8 V reference-grade supply ensuring consistent gain and offset performance. Use Value: 20 ppm/°C temperature coefficient and <0.5% load regulation maintain calibration across operating conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2802E/TO | 150 mA output, 2.8 V fixed, 1.6 µA quiescent current, no Bypass pin, 600 mV dropout min | Lacks reference bypass for ultra-low-noise operation; higher dropout limits low-VIN use cases | Prefer TC2185-2.8VCTTR where noise-sensitive analog rails or sub-3 V input operation is required |
| TPS7A2028PDQNR | 300 mA output, 2.8 V fixed, 6.5 µA quiescent current, no Bypass pin, 130 mV dropout typ @ 300 mA | Higher current capacity but no Bypass pin; PSRR peaks at 70 dB but lacks dedicated noise-reduction path | Choose TC2185-2.8VCTTR when Bypass-enabled noise suppression below 10 kHz is mandatory |
Compared with MCP1700-2802E/TO and TPS7A2028PDQNR, the TC2185-2.8VCTTR uniquely combines 150 mA output, dedicated Bypass pin for sub-200 nV/√Hz noise, and 140 mV dropout-making it optimal for space-constrained, noise-critical battery-powered systems where reference-level stability is non-negotiable.
Availability
TC2185-2.8VCTTR is available at Aetrix Electronics and suitable for battery-operated medical instruments, portable cellular phones, and instrumentation signal chains requiring stable component supply and long-term manufacturability.
Supply support for TC2185-2.8VCTTR 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs, with global distribution and automotive-grade qualification capabilities.
The TC2014/TC2015/TC2185 family was designed as CMOS-based LDO upgrades to bipolar regulators-targeting ultra-low-quiescent-current, high-accuracy, and low-noise power delivery in portable and medical electronics.
FAQ
What is the maximum input voltage rating for the TC2185-2.8VCTTR?
The TC2185-2.8VCTTR has an absolute maximum input voltage rating of 7.0 V. Operation above this level risks permanent device damage. For reliable long-term use, the recommended operating input range is 2.7 V to 6.0 V, ensuring proper regulation while maintaining margin against transients and thermal stress. The TC2185-2.8VCTTR achieves full 150 mA output capability within this range.
Does the TC2185-2.8VCTTR require an external capacitor on the Bypass pin?
No, the Bypass pin on the TC2185-2.8VCTTR is optional: connecting a 0.01 µF ceramic capacitor improves PSRR and reduces output noise to 200 nV/√Hz, but leaving it unconnected maintains full functionality at standard noise levels. The TC2185-2.8VCTTR remains stable and meets all specifications without the Bypass capacitor, making it usable in cost-sensitive designs where ultra-low noise is not required.
Can the TC2185-2.8VCTTR be used with ceramic output capacitors?
Yes, the TC2185-2.8VCTTR is fully stable with 1 µF ceramic output capacitors having ESR between 0.01 Ω and 5 Ω-X5R and X7R dielectrics are recommended for temperature stability. This eliminates the need for tantalum or aluminum electrolytic capacitors, reducing board area and improving reliability. The TC2185-2.8VCTTR's internal compensation ensures robust phase margin across the full 1–10 µF ceramic range.
What is the shutdown behavior of the TC2185-2.8VCTTR?
When the SHDN pin is pulled low (≤15% VIN), the TC2185-2.8VCTTR disables its pass element, driving VOUT to 0 V and reducing supply current to 0.5 µA (max). Wake-up occurs in 60 µs (typ.) after SHDN rises above 60% VIN. This behavior is fully specified across –40°C to +125°C and enables precise power gating in battery-critical systems using the TC2185-2.8VCTTR.
Is the TC2185-2.8VCTTR pin-compatible with other regulators in its family?
Yes, the TC2185-2.8VCTTR shares identical 5-pin SOT-23A pinout and footprint with the TC2014 and TC2015 series, enabling drop-in replacement across 50 mA, 100 mA, and 150 mA variants. All three devices use VIN, GND, SHDN, Bypass, and VOUT on pins 1–5 respectively-allowing design reuse and scalability without PCB revision. The TC2185-2.8VCTTR maintains functional compatibility while delivering higher output current.
TC2185-2.8VCTTR 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):
- 2.8V
- 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
TC2185-2.8VCTTR FAQ
1.How can I place an order for TC2185-2.8VCTTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC2185-2.8VCTTR 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 TC2185-2.8VCTTR reliable?
The price and inventory of TC2185-2.8VCTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC2185-2.8VCTTR is usually 5 days.
3.What payment methods are accepted for TC2185-2.8VCTTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC2185-2.8VCTTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC2185-2.8VCTTR?
TC2185-2.8VCTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC2185-2.8VCTTR 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 TC2185-2.8VCTTR?
For technical support, including TC2185-2.8VCTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC2185-2.8VCTTR requirements.
6.How does Aetrix verify that TC2185-2.8VCTTR is sourced from the original manufacturer or authorized distributors?
All TC2185-2.8VCTTR 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 TC2185-2.8VCTTR meets industry standards.
7.What is the process for return or replacement of TC2185-2.8VCTTR?
All TC2185-2.8VCTTR units undergo pre-shipment inspection (PSI). If there is an issue with TC2185-2.8VCTTR, 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 TC2185-2.8VCTTR part is unused and in its original packaging.
Return procedure for TC2185-2.8VCTTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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