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Microchip Technology TC2185-2.5VCTTR
- Part No.:
- TC2185-2.5VCTTR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TC2185-2.5VCTTR.pdf
- Description:
- IC REG LINEAR 2.5V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TC2185-2.5VCTTR from Microchip Technology is a 150 mA, fixed-output CMOS low-dropout (LDO) voltage regulator in a 5-pin SOT-23A package, delivering ±0.4% output voltage accuracy at 2.5 V, 140 mV typical dropout at full load, and ultra-low 80 µA max supply current. It features shutdown control, reference bypass input for noise reduction, and operates across –40°C to +125°C - ideal for battery-powered medical instrumentation requiring stable, low-noise 2.5 V bias.
For engineers reviewing the TC2185-2.5VCTTR datasheet, TC2185-2.5VCTTR pinout, TC2185-2.5VCTTR application, or TC2185-2.5VCTTR equivalent, key selection criteria include verified 150 mA output capability, 2.5 V fixed output with ±0.4% tolerance, 140 mV dropout at 150 mA, 60 µs wake-up time from shutdown, and compatibility with 1 µF ceramic output capacitance.
Technical Context
The TC2185-2.5VCTTR implements a CMOS-based LDO architecture optimized for low quiescent current and high PSRR, using an internal bandgap reference buffered via the Bypass pin to achieve 200 nV/√Hz output noise. Its shutdown logic responds within 60 µs, reducing supply current to 0.5 µA max while driving VOUT to zero.
Stable with only 1 µF output capacitance (ESR 0.01–5 Ω), it supports wide-input operation from 2.7 V to 6.0 V and integrates overcurrent and thermal shutdown protection triggered at ~160°C junction temperature, with automatic recovery at ~150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±0.4% (typical accuracy enables precision analog sensor biasing without external trimming) |
| Max Output Current | 150 mA (supports moderate-power microcontrollers or RF front-end ICs without thermal derating under typical PCB layout) |
| Dropout Voltage | 140 mV (typ.) at 150 mA (enables regulation from 2.64 V input - critical for single-cell Li-ion or LiFePO₄ systems) |
| Supply Current | 80 µA (max) active, 0.5 µA (max) in shutdown (extends battery life in always-on portable devices) |
| PSRR | 55 dB @ ≤1 kHz (with 0.01 µF Bypass cap - suppresses switching noise from upstream SMPS in mixed-signal systems) |
| Operating Temp | –40°C to +125°C (qualified for automotive under-hood and industrial embedded environments) |
| Thermal Shutdown | Triggers at ~160°C, recovers at ~150°C (prevents permanent damage during transient overload or poor heatsinking) |
Pinout & Package
TC2185-2.5VCTTR is housed in a 5-lead plastic SOT-23A (EIAJ SC-74A) package with 220°C/W junction-to-air thermal resistance on standard FR4 PCBs. Pin 1 (VIN) is marked by a dot or beveled edge; device orientation follows EIAJ tape direction standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Unregulated input supply | Accepts 2.7–6.0 V; requires ≥1 µF local ceramic decoupling for stability and transient response |
| 2 - GND | Ground reference terminal | Common return for input/output capacitors and Bypass capacitor; must connect to low-impedance ground plane |
| 3 - SHDN | Active-high shutdown control | Drives VOUT to 0 V and reduces IIN to ≤0.5 µA when pulled ≤15% of VIN; compatible with 1.8 V/3.3 V logic |
| 4 - Bypass | Reference bypass input | Connects 470 pF–0.01 µF ceramic cap to GND to reduce output noise to 200 nV/√Hz and improve PSRR |
| 5 - VOUT | Regulated 2.5 V output | Delivers up to 150 mA; requires ≥1 µF ceramic output capacitor with ESR 0.01–5 Ω for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 80 µA max ensures >1-year runtime on coin-cell batteries in low-duty-cycle IoT sensors |
| Reference bypass input | Enables 200 nV/√Hz output noise and 55 dB PSRR - critical for ADC reference supplies and RF LNA biasing |
| Fast wake-up from shutdown | 60 µs response time allows rapid power cycling in energy-harvesting systems without compromising system latency |
| Robust protection suite | Integrated overcurrent limit and thermal shutdown prevent field failures in unattended medical or industrial deployments |
| Minimal external components | Stable with only 1 µF input and 1 µF output ceramic caps - reduces BOM count and PCB area vs. bipolar LDO alternatives |
Applications
| Battery-Powered Medical Sensors | Portable Diagnostic Handhelds |
|---|---|
Use Scenario: Powering low-noise analog front-ends in glucose meters and pulse oximeters operating from single Li-ion cells. IC Role / Device Role / Timing Role: Provides clean, stable 2.5 V reference and signal-chain bias under dynamic load conditions. Use Value: ±0.4% output accuracy and 200 nV/√Hz noise ensure <1 LSB error in 12-bit ADC conversions without post-calibration. |
Use Scenario: Regulating power for ARM Cortex-M4 microcontrollers and BLE radios in handheld ultrasound probes. IC Role / Device Role / Timing Role: Delivers 150 mA peak current during RF transmission bursts while maintaining tight voltage regulation. Use Value: 140 mV dropout at 150 mA enables operation down to 2.64 V input - extends usable battery range by 12% vs. legacy bipolar regulators. |
| Industrial Process Monitoring Nodes | Automotive Cabin Control Modules |
Use Scenario: Supplying isolated sensor interfaces and CAN transceivers in DIN-rail-mounted condition monitoring gateways. IC Role / Device Role / Timing Role: Acts as post-regulator after wide-input buck converter to reject switching noise and meet EMC requirements. Use Value: 55 dB PSRR at ≤1 kHz suppresses 100–500 kHz SMPS ripple, eliminating need for additional LC filtering stages. |
Use Scenario: Powering touch controller ICs and display drivers in HVAC control panels exposed to under-dash temperatures. IC Role / Device Role / Timing Role: Maintains regulated 2.5 V output across –40°C to +125°C ambient with no performance degradation. Use Value: Guaranteed operation over full automotive temperature range eliminates derating and simplifies thermal design validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2502E/TO | 150 mA output, but only 2.5 V ±2% accuracy and no Bypass pin; 1.6 µA quiescent current | Lacks ultra-low-noise capability; unsuitable for precision ADC references or RF biasing | Choose for ultra-low-power sleep-mode applications where accuracy and noise are secondary |
| TPS7A0525PDBVR | 200 mA output, ±1% accuracy, 170 mV dropout at 200 mA, integrated thermal foldback | Higher dropout and looser accuracy; no dedicated Bypass pin - relies on external RC filter for noise reduction | Prefer when higher output current is required and board space allows added passive filtering |
Compared with MCP1700-2502E/TO and TPS7A0525PDBVR, TC2185-2.5VCTTR uniquely delivers ±0.4% accuracy, 200 nV/√Hz noise via Bypass pin, and 140 mV dropout at 150 mA - making it the only option qualified for high-fidelity analog sensing and compact battery-powered designs demanding both precision and efficiency.
Availability
TC2185-2.5VCTTR is available at Aetrix Electronics and suitable for battery-operated medical instruments, portable diagnostic handhelds, and industrial process monitoring nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for TC2185-2.5VCTTR 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, manufacturing, and sales operations.
The TC2014/TC2015/TC2185 family was designed as CMOS-based LDO upgrades to bipolar regulators like LP2980 - targeting ultra-low-power, high-accuracy, and low-noise applications in portable and industrial electronics.
FAQ
What is the maximum input voltage rating for TC2185-2.5VCTTR?
The absolute maximum input voltage for TC2185-2.5VCTTR is 7.0 V. Operation above this level risks permanent damage. The recommended operating input range is 2.7 V to 6.0 V, ensuring proper regulation and thermal margin. Exceeding 6.0 V may increase power dissipation beyond safe limits even at light loads, especially at high ambient temperatures.
Does TC2185-2.5VCTTR require an external capacitor on the Bypass pin?
No, the Bypass pin on TC2185-2.5VCTTR is optional. Connecting a 470 pF to 0.01 µF ceramic capacitor from Bypass to GND reduces output noise to 200 nV/√Hz and improves PSRR, but leaving it unconnected still yields functional regulation. Omitting the capacitor increases output noise and degrades ripple rejection - acceptable only in non-sensitive digital supply applications.
Can TC2185-2.5VCTTR operate with a 1 µF ceramic output capacitor?
Yes, TC2185-2.5VCTTR is explicitly characterized and stable with a minimum 1 µF ceramic output capacitor having ESR between 0.01 Ω and 5 Ω. This is confirmed in the datasheet's "Output Capacitor" section (DS21662F-page 10) and distinguishes it from older LDOs requiring larger or tantalum-based capacitors for stability.
What is the shutdown current consumption of TC2185-2.5VCTTR?
TC2185-2.5VCTTR draws ≤0.5 µA (maximum) supply current in shutdown mode, with typical consumption at 0.05 µA. This occurs when the SHDN pin is driven to ≤15% of VIN, causing VOUT to fall to 0 V. This ultra-low shutdown current is critical for extending shelf life and standby time in battery-powered systems.
Is TC2185-2.5VCTTR pin-compatible with the LP2980 series?
Yes, TC2185-2.5VCTTR is explicitly described in its datasheet as a pin-compatible upgrade for bipolar LDOs such as the LP2980. Both use identical 5-pin SOT-23A footprints and share matching pin assignments (VIN, GND, SHDN, Bypass/EN, VOUT), enabling drop-in replacement without PCB redesign - provided thermal and output capacitance requirements are reviewed.
TC2185-2.5VCTTR 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):
- 2.5V
- 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
TC2185-2.5VCTTR FAQ
1.How can I place an order for TC2185-2.5VCTTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC2185-2.5VCTTR 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 TC2185-2.5VCTTR reliable?
The price and inventory of TC2185-2.5VCTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC2185-2.5VCTTR is usually 5 days.
3.What payment methods are accepted for TC2185-2.5VCTTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC2185-2.5VCTTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC2185-2.5VCTTR?
TC2185-2.5VCTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC2185-2.5VCTTR 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 TC2185-2.5VCTTR?
For technical support, including TC2185-2.5VCTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC2185-2.5VCTTR requirements.
6.How does Aetrix verify that TC2185-2.5VCTTR is sourced from the original manufacturer or authorized distributors?
All TC2185-2.5VCTTR 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 TC2185-2.5VCTTR meets industry standards.
7.What is the process for return or replacement of TC2185-2.5VCTTR?
All TC2185-2.5VCTTR units undergo pre-shipment inspection (PSI). If there is an issue with TC2185-2.5VCTTR, 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 TC2185-2.5VCTTR part is unused and in its original packaging.
Return procedure for TC2185-2.5VCTTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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