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Microchip Technology TC1108-2.8VDBTR
- Part No.:
- TC1108-2.8VDBTR
- Manufacturer:
- Microchip Technology
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
TC1108-2.8VDBTR.pdf
- Description:
- IC REG LIN 2.8V 300MA SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,734
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Product details
Overview
TC1108-2.8VDBTR from Microchip Technology is a fixed-output, CMOS low dropout (LDO) voltage regulator delivering 2.8V at up to 300mA with ±0.5% output accuracy, 50μA typical supply current, and 240mV typical dropout voltage at full load. It serves as a precision post-regulator in battery-powered portable electronics requiring stable low-noise power.
For engineers reviewing the TC1108-2.8VDBTR datasheet, TC1108-2.8VDBTR pinout, TC1108-2.8VDBTR application, or TC1108-2.8VDBTR equivalent, key selection criteria include ultra-low quiescent current for extended battery life, thermal/overcurrent protection, SOT-223 package compatibility, and 1μF minimum output capacitance stability.
Technical Context
The TC1108-2.8VDBTR employs 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 (150°C trip, 140°C recovery) 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 sensitive analog and RTC circuits. Stability is guaranteed with ≥1μF ceramic or tantalum output capacitance (ESR 0.1–5.0Ω), eliminating need for external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8V ±0.5% (±14mV) - ensures tight regulation for 2.8V logic rails and analog references |
| Max Output Current | 300mA - supports moderate-power microcontrollers, sensors, and RF front-ends |
| Dropout Voltage | 240mV at 300mA - enables operation from 3.04V input, critical for single-cell Li-ion or alkaline systems |
| Supply Current | 50μA typical - extends battery life in always-on monitoring and backup applications |
| PSRR | 60dB at ≤1kHz - suppresses switching noise from upstream SMPS in hybrid power architectures |
| Output Noise | 260nV/√Hz at 10kHz - minimizes jitter in clock buffers and noise-sensitive ADCs |
| Thermal Shutdown | 150°C junction trip - protects against sustained overload or poor PCB heatsinking |
Pinout & Package
TC1108-2.8VDBTR is housed in a 3-pin SOT-223 package with exposed thermal pad (tab connected to GND per standard layout). The package measures 6.70 × 3.70 × 1.80 mm and supports up to 59°C/W junction-to-ambient thermal resistance on 100 mm² copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Unregulated input supply | Accepts 2.7–6.0V; must exceed VOUT + dropout (≥3.04V for 2.8V output at 300mA) |
| 2 (GND) | Ground reference and thermal path | Internal connection to exposed tab; requires solid thermal pad to PCB ground plane |
| 3 (VOUT) | Regulated 2.8V output | Stable under 0.1mA–300mA load; requires ≥1μF output capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50μA typical across full 0–300mA load range - eliminates load-dependent battery drain increase |
| Low-noise regulation | 260nV/√Hz output noise with 1μF capacitor - suitable for powering PLLs and precision ADCs |
| Fast transient response | Stable under rapid load steps without external compensation - simplifies design for pulsed loads |
| Integrated protection | Thermal shutdown (150°C) and current limiting (550–650mA) - prevents damage during fault conditions |
| Minimal external components | Stable with only 1μF output capacitor (ESR 0.1–5.0Ω) - reduces BOM count and board space |
Applications
| Medical Wearables | Portable Diagnostic Devices |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE radio and low-power sensor interface. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying MCU core, BLE transceiver, and analog front-end. Use Value: 50μA quiescent current extends coin-cell battery life beyond 6 months; 240mV dropout enables operation down to 3.04V input during battery discharge. |
Use Scenario: Handheld ECG recorder with real-time signal processing and LCD display. IC Role / Device Role / Timing Role: Clean 2.8V rail for 16-bit ADC and low-jitter system clock generator. Use Value: 260nV/√Hz noise floor preserves signal integrity; ±0.5% accuracy maintains calibration stability across -40°C to +85°C operating range. |
| GSM/GPRS Modems | Industrial Sensor Nodes |
|
Use Scenario: Cellular IoT module in remote asset tracker powered by Li-SOCl₂ primary cell. IC Role / Device Role / Timing Role: Post-regulator converting 3.6V battery to stable 2.8V for modem baseband and RF PA bias. Use Value: Thermal shutdown prevents thermal runaway during high-current GSM burst transmission; 60dB PSRR rejects SMPS ripple from auxiliary DC-DC converter. |
Use Scenario: Wireless temperature/humidity node using LoRaWAN with 10-year battery target. IC Role / Device Role / Timing Role: Always-on 2.8V supply for RTC, EEPROM, and ultra-low-power MCU sleep mode. Use Value: Constant 50μA supply current (independent of load) maximizes energy efficiency in deep-sleep cycles; 1μF capacitor requirement simplifies layout in space-constrained enclosures. |
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 | Same 2.8V output, but 250mA max output current and 1.8μA quiescent current - lower IQ but reduced drive capability. | Suitable for sub-250mA sensor nodes; insufficient for GSM burst loads requiring 300mA peak. | Select MCP1700-2802E/TO only when load current stays below 250mA and ultra-low IQ is prioritized over drive strength. |
| NCP1117ST2.8T3G | Bipolar-based LDO with 1.2V dropout at 800mA, 6mA quiescent current, and ±2% output tolerance - higher IQ and looser accuracy. | Acceptable for cost-sensitive industrial controls where 2.8V tolerance >±14mV is acceptable and thermal margin is ample. | Choose NCP1117ST2.8T3G only if board-level heatsinking supports higher power dissipation and ±2% output error is within system budget. |
Compared with MCP1700-2802E/TO, TC1108-2.8VDBTR delivers 20% higher output current for burst-mode wireless loads; versus NCP1117ST2.8T3G, it offers 120× lower quiescent current and 4× tighter voltage accuracy-critical for battery longevity and precision analog performance.
Availability
TC1108-2.8VDBTR is available at Aetrix Electronics and suitable for medical wearables, portable diagnostic devices, and GSM/GPRS modems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TC1108-2.8VDBTR 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 company specializing in microcontrollers, analog devices, and power management ICs, with ISO/TS-16949 certified manufacturing.
The TC1108 family was designed specifically for battery-operated portable electronics demanding ultra-low quiescent current, high accuracy, and robust protection-targeting medical, telecom, and instrumentation markets.
FAQ
What is the minimum input voltage required for TC1108-2.8VDBTR to maintain regulation?
The TC1108-2.8VDBTR requires VIN ≥ VOUT + dropout voltage. At 300mA load, dropout is 240mV, so minimum VIN = 2.8V + 0.24V = 3.04V. Per datasheet Note 7, VIN must also be ≥2.7V - thus 3.04V governs. Below this, output voltage drops out of specification. TC1108-2.8VDBTR maintains regulation down to 3.04V input under full load.
Can TC1108-2.8VDBTR operate with a 1μF ceramic output capacitor?
Yes - TC1108-2.8VDBTR is explicitly specified to be stable with a 1μF output capacitor, provided its ESR is between 0.1Ω and 5.0Ω. X5R/X7R ceramic capacitors typically meet this ESR range and are widely used. TC1108-2.8VDBTR does not require tantalum or electrolytic types unless low-temperature operation (<–25°C) mandates solid tantalum per datasheet guidance.
Does TC1108-2.8VDBTR include reverse polarity or reverse current protection?
No - TC1108-2.8VDBTR does not integrate reverse polarity or reverse current protection. The device assumes correct VIN/GND polarity and unidirectional current flow from input to output. External protection (e.g., series Schottky diode or MOSFET-based ideal diode) must be added if reverse input voltage or backfeed scenarios exist. TC1108-2.8VDBTR relies solely on overcurrent and overtemperature protection for fault safety.
What is the thermal resistance (θJA) of TC1108-2.8VDBTR on a standard PCB?
θJA for TC1108-2.8VDBTR depends on PCB copper area. With 100 mm² topside copper (and 2500 mm² backside copper), θJA = 59°C/W per Table 4-1. Doubling topside copper to 225 mm² reduces θJA to 53°C/W. TC1108-2.8VDBTR's exposed tab must be soldered to a GND plane to achieve these values; isolated mounting increases thermal resistance significantly.
Is TC1108-2.8VDBTR suitable for powering RF circuits like Bluetooth or GSM transceivers?
Yes - TC1108-2.8VDBTR is well-suited for RF circuits due to its 60dB PSRR at ≤1kHz (suppressing SMPS ripple), 260nV/√Hz output noise (minimizing phase noise), and fast transient response to pulsed RF loads. Its 300mA rating covers peak GSM Class 4 transmit currents. TC1108-2.8VDBTR has been deployed in cellular phones and pagers per its official Applications list.
TC1108-2.8VDBTR 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):
- 2.8V
- 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
TC1108-2.8VDBTR FAQ
1.How can I place an order for TC1108-2.8VDBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1108-2.8VDBTR 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 TC1108-2.8VDBTR reliable?
The price and inventory of TC1108-2.8VDBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1108-2.8VDBTR is usually 5 days.
3.What payment methods are accepted for TC1108-2.8VDBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1108-2.8VDBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1108-2.8VDBTR?
TC1108-2.8VDBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1108-2.8VDBTR 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 TC1108-2.8VDBTR?
For technical support, including TC1108-2.8VDBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1108-2.8VDBTR requirements.
6.How does Aetrix verify that TC1108-2.8VDBTR is sourced from the original manufacturer or authorized distributors?
All TC1108-2.8VDBTR 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 TC1108-2.8VDBTR meets industry standards.
7.What is the process for return or replacement of TC1108-2.8VDBTR?
All TC1108-2.8VDBTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1108-2.8VDBTR, 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 TC1108-2.8VDBTR part is unused and in its original packaging.
Return procedure for TC1108-2.8VDBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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