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Microchip Technology TC1108-2.5VDBTR
- Part No.:
- TC1108-2.5VDBTR
- Manufacturer:
- Microchip Technology
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
TC1108-2.5VDBTR.pdf
- Description:
- IC REG LIN 2.5V 300MA SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,835
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Product details
Overview
TC1108-2.5VDBTR from Microchip Technology is a fixed-output, CMOS low dropout (LDO) voltage regulator delivering 2.5V at up to 300mA with ±0.5% output voltage accuracy, 240mV typical dropout at full load, and only 50μA typical quiescent current. It serves as a precision post-regulator in battery-powered portable electronics requiring stable, low-noise power for sensitive analog or real-time circuits.
For engineers reviewing the TC1108-2.5VDBTR datasheet, TC1108-2.5VDBTR pinout, TC1108-2.5VDBTR application, or TC1108-2.5VDBTR equivalent, key selection criteria include ultra-low supply current, thermal/overcurrent protection, SOT-223 package compatibility, and stability with 1μF ceramic output capacitance - critical for space-constrained medical instruments and GSM phone power rails.
Technical Context
The TC1108-2.5VDBTR uses a CMOS pass element enabling constant 50μA supply current across 0–300mA load range - unlike bipolar regulators whose bias current rises with load. Its internal circuitry integrates thermal shutdown (trip at 150°C, reset at ~140°C) and foldback overcurrent protection limiting short-circuit current to 550–650mA.
It achieves 60dB PSRR at ≤1kHz and 260nV/√Hz output noise at 10kHz with 1μF output capacitor, supporting low-noise analog subsystems. Stability is guaranteed with ≥1μF output capacitance having ESR between 0.1Ω and 5.0Ω - compatible with solid tantalum or aluminum electrolytic types.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±0.5% (±12.5mV) over -40°C to +125°C - ensures RTC and CMOS RAM backup voltage remains within specification across industrial temperature range. |
| Max Output Current | 300mA - sufficient to power microcontroller cores, sensors, or RF front-ends without external boost stages. |
| Dropout Voltage | 240mV typical at 300mA load - enables operation from 2.74V input (e.g., single Li-ion cell at end-of-discharge) while maintaining regulation. |
| Quiescent Current | 50μA typical - reduces standby power loss by >20× vs. bipolar LDOs, extending battery life in pagers and portable medical devices. |
| PSRR | 60dB at ≤1kHz - suppresses ripple from upstream SMPS, eliminating need for additional LC filtering in linear post-regulator applications. |
| Output Noise | 260nV/√Hz at 10kHz - minimizes jitter in clock-sensitive circuits and noise coupling into ADC reference paths. |
| Thermal Shutdown | Activates at 150°C junction temperature - protects against sustained overload or poor PCB copper layout without external thermal monitoring. |
Pinout & Package
TC1108-2.5VDBTR is housed in a 3-pin SOT-223 package with exposed tab (pin 2) thermally connected to GND. The package measures 6.70 × 3.70 × 1.80 mm and supports ≥500W/m·K thermal conductivity when soldered to ≥225 mm² top-side copper area (θJA = 53°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Unregulated input supply | Accepts 2.7–6.0V DC; must exceed VOUT + dropout (≥2.74V for 2.5V output) - requires local 1μF bypass if >10" wire length or battery source. |
| 2 (GND) | Ground reference and thermal pad | Primary return path for load current and regulator bias; exposed tab must be soldered to PCB ground plane for thermal performance and EMI control. |
| 3 (VOUT) | Regulated 2.5V output | Delivers stable 2.5V to load; requires ≥1μF ceramic or tantalum capacitor to ground - ESR 0.1–5.0Ω ensures stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50μA typical across full 0–300mA load range - eliminates load-dependent bias current drift, enabling accurate battery runtime prediction. |
| Low-noise regulation | 260nV/√Hz output noise at 10kHz - preserves signal integrity in audio codecs, precision ADCs, and RF synthesizer VCO supplies. |
| Fast load transient response | Maintains regulation during 100mA step changes without external compensation - due to CMOS architecture and minimal 1μF output cap requirement. |
| Integrated protection | Thermal shutdown (150°C trip) and current limiting (550–650mA short-circuit) - removes need for discrete thermal fuses or current-sense resistors. |
| Wide input voltage range | 2.7–6.0V operation - supports direct connection to single-cell Li-ion (2.7–4.2V), 3.3V SMPS rails, or 5V USB sources. |
Applications
| Battery-Powered Medical Sensors | GSM/PHS Phone Baseband Power |
|---|---|
|
Use Scenario: Continuous glucose monitor with low-power MCU and analog front-end operating from coin-cell or Li-ion battery. IC Role / Device Role / Timing Role: Primary 2.5V LDO supplying ADC reference, sensor bias, and real-time clock - replacing less efficient bipolar regulators. Use Value: 50μA quiescent current extends battery life beyond 1 year; ±0.5% accuracy ensures consistent sensor calibration across temperature. |
Use Scenario: Powering baseband processor and RF transceiver ICs in dual-mode GSM/PHS handsets. IC Role / Device Role / Timing Role: Linear post-regulator cleaning switching converter ripple on 2.5V core rail - placed after buck converter for noise-sensitive digital blocks. Use Value: 60dB PSRR at 1kHz attenuates SMPS ripple; 240mV dropout allows operation down to 2.74V input - critical during battery discharge. |
| Portable Instrumentation Front-End | Linear Post-Regulator for SMPS |
|
Use Scenario: Handheld multimeter with precision op-amps, 16-bit SAR ADC, and LCD driver requiring clean 2.5V reference and analog supply. IC Role / Device Role / Timing Role: Low-noise 2.5V source for ADC reference and analog signal chain - decoupled from noisy digital supply domains. Use Value: 260nV/√Hz noise prevents degradation of ENOB; 1μF stability enables compact layout without large bulk capacitors. |
Use Scenario: Secondary regulation stage following a high-efficiency 3.3V buck converter powering FPGA I/O banks or memory interfaces. IC Role / Device Role / Timing Role: Ripple-rejection LDO converting 3.3V SMPS output to tightly regulated 2.5V - isolating noise-sensitive logic from switching artifacts. Use Value: Eliminates need for ferrite beads and additional capacitors; thermal shutdown prevents damage during FPGA configuration current surges. |
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 | Same 2.5V output, but 250mA max current and 1.8μA quiescent current - lower IQ but reduced output capability. | Suitable for ultra-low-power sensor nodes where 300mA peak is never required; not recommended for GSM PA bias or motor drivers. | Select MCP1700-2502E/TO only when load current stays below 250mA and sub-µA standby is mandatory. |
| TPS76325DBVR | 2.5V output, 150mA max, 80μA IQ, and 350mV dropout at full load - higher dropout and lower current than TC1108-2.5VDBTR. | Better suited for cost-sensitive consumer devices with relaxed dropout requirements and moderate load profiles. | Choose TPS76325DBVR if board space allows larger dropout margin and thermal design accommodates higher θJA. |
Compared with MCP1700-2502E/TO and TPS76325DBVR, TC1108-2.5VDBTR uniquely balances 300mA drive, 240mV dropout, and 50μA IQ in SOT-223 - making it optimal for battery-operated systems needing both high current headroom and multi-year standby life.
Availability
TC1108-2.5VDBTR is available at Aetrix Electronics and suitable for battery-operated medical instruments, GSM/PHS handset power rails, and portable instrumentation requiring stable component supply with guaranteed long-term sourcing.
Supply support for TC1108-2.5VDBTR 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 ISO/TS-16949 certified wafer fabrication facilities.
The TC1108 series was designed as a precision, low-quiescent-current LDO family targeting battery-backed real-time systems and portable communications equipment - emphasizing accuracy, thermal robustness, and minimal external components.
FAQ
What is the minimum input voltage required for TC1108-2.5VDBTR to maintain regulation?
The TC1108-2.5VDBTR requires VIN ≥ 2.7V per datasheet specifications, but practical minimum is determined by dropout: at 300mA load, dropout is 240mV, so VIN must be ≥ 2.74V to sustain 2.5V output. Below this, output voltage drops nonlinearly - verified across -40°C to +125°C junction temperature range.
Can TC1108-2.5VDBTR operate with a 1μF ceramic output capacitor?
Yes, TC1108-2.5VDBTR is explicitly characterized for stability with a 1μF ceramic output capacitor (ESR 0.1–5.0Ω). This is confirmed in DS21357C-page 3 Section 3.1 and Figure 3-1 - enabling compact, low-BOM-count designs without tantalum or electrolytic alternatives.
Does TC1108-2.5VDBTR include overtemperature protection?
Yes, TC1108-2.5VDBTR incorporates integrated thermal shutdown that disables the output when junction temperature exceeds 150°C, re-enabling automatically when die temperature falls to ~140°C - detailed in DS21357C-page 4 Section 4.1 and validated across all SOT-223 mounting configurations.
What is the output voltage accuracy of TC1108-2.5VDBTR over temperature?
TC1108-2.5VDBTR guarantees ±0.5% output voltage accuracy over -40°C to +125°C junction temperature, corresponding to ±12.5mV deviation from nominal 2.5V - specified in DS21357C-page 2 Electrical Characteristics table under VOUT parameter.
Is TC1108-2.5VDBTR pin-compatible with other TC1108 variants like TC1108-3.3VDBTR?
Yes, all TC1108-x.xVDBTR variants share identical 3-pin SOT-223 pinout (VIN-GND-VOUT) and package footprint - confirmed in DS21357C-page 2 Device Selection Table and page 3 Pin Descriptions. Only output voltage differs; no PCB redesign is needed when swapping between 2.5V, 3.3V, or 5.0V versions.
TC1108-2.5VDBTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- 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):
- 0.48V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (1kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
TC1108-2.5VDBTR FAQ
1.How can I place an order for TC1108-2.5VDBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1108-2.5VDBTR 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 TC1108-2.5VDBTR reliable?
The price and inventory of TC1108-2.5VDBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1108-2.5VDBTR is usually 5 days.
3.What payment methods are accepted for TC1108-2.5VDBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1108-2.5VDBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1108-2.5VDBTR?
TC1108-2.5VDBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1108-2.5VDBTR 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 TC1108-2.5VDBTR?
For technical support, including TC1108-2.5VDBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1108-2.5VDBTR requirements.
6.How does Aetrix verify that TC1108-2.5VDBTR is sourced from the original manufacturer or authorized distributors?
All TC1108-2.5VDBTR 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 TC1108-2.5VDBTR meets industry standards.
7.What is the process for return or replacement of TC1108-2.5VDBTR?
All TC1108-2.5VDBTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1108-2.5VDBTR, 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 TC1108-2.5VDBTR part is unused and in its original packaging.
Return procedure for TC1108-2.5VDBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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