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Microchip Technology TC1269-2.8VUATR
- Part No.:
- TC1269-2.8VUATR
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1269-2.8VUATR.pdf
- Description:
- IC REG LINEAR 2.8V 300MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,615
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Product details
Overview
TC1269-2.8VUATR from Microchip Technology is a fixed-output 2.8V CMOS low-dropout (LDO) regulator with ±0.5% output voltage accuracy, 300mA maximum output current, and ultra-low 50µA typical supply current at full load. It features shutdown control, bypass input for noise reduction, and thermal/overcurrent protection - designed for battery-powered portable electronics requiring stable, quiet power rails.
For engineers reviewing the TC1269-2.8VUATR datasheet, TC1269-2.8VUATR pinout, TC1269-2.8VUATR application, or TC1269-2.8VUATR equivalent, key selection criteria include dropout voltage (240mV at 300mA), shutdown quiescent current (0.05µA), output noise (260nV/√Hz), and MSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The TC1269-2.8VUATR uses a CMOS pass element to achieve near-constant 50µA supply current across 0–300mA load range - unlike bipolar LDOs whose quiescent current rises with load. Its internal reference is stabilized via optional 470pF bypass capacitor on the Bypass pin, reducing output noise by filtering reference voltage ripple.
Regulation is maintained over -40°C to +125°C junction temperature, with line regulation of 0.05% (typical) and load regulation of 0.5% (typical) from 0.1mA to 300mA. Thermal shutdown activates at ~150°C, and the device remains stable with only 1µF output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±0.5% (ensures precise biasing for 2.8V logic or analog circuitry) |
| Max Output Current | 300mA (supports moderate-power microcontrollers, sensors, or RF front-ends) |
| Dropout Voltage | 240mV at 300mA load (enables operation from 3.04V input, e.g., single Li-ion cell under discharge) |
| Supply Current | 50µA typical at full load (extends battery life in always-on portable systems) |
| Shutdown Current | 0.05µA typical (reduces standby power to negligible levels in sleep modes) |
| Output Noise | 260nV/√Hz at 1kHz (minimizes interference in sensitive analog signal chains) |
| PSRR | 50dB at ≤120Hz (attenuates low-frequency ripple from upstream SMPS stages) |
Pinout & Package
TC1269-2.8VUATR is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 1.1mm height), optimized for high-density portable PCBs. The package includes exposed pad for thermal dissipation and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated output | Delivers stable 2.8V to load; requires ≥1µF ceramic or tantalum output capacitor |
| NC (Pin 2) | No connect | Internally unconnected; must remain floating or grounded per layout best practice |
| NC (Pin 3) | No connect | Internally unconnected; no external connection required |
| GND (Pin 4) | Ground reference | Primary return path for load and internal circuitry; tie to solid ground plane |
| Bypass (Pin 5) | Reference bypass input | Accepts 470pF capacitor to ground to reduce internal reference noise and improve output spectral purity |
| NC (Pin 6) | No connect | Internally unconnected; leave unconnected |
| SHDN (Pin 7) | Shutdown control | Logic-high (>45% VIN) enables regulator; logic-low (<15% VIN) disables output and reduces IQ to 0.05µA |
| VIN (Pin 8) | Input supply | Accepts 2.8V to 6.0V unregulated input; place ≥1µF decoupling capacitor close to this pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ground current | 50µA typical at full 300mA load - 20–60× lower than legacy bipolar LDOs, directly extending battery runtime |
| Low-noise operation | 260nV/√Hz output noise with optional 470pF bypass capacitor - critical for ADC references and RF power amplifiers |
| Fast load transient response | Maintains regulation during rapid load steps (e.g., MCU wake-up bursts) without external compensation |
| Thermal & overcurrent protection | Auto-shutdown at ~150°C junction temperature and current limiting at ~600mA - prevents damage under fault conditions |
| Minimal external components | Stable with only 1µF output capacitor and no ESR requirements - simplifies design and reduces BOM count |
Applications
| Battery-Powered Medical Sensors | Portable Digital Cameras |
|---|---|
Use Scenario: Powering low-power biosignal amplifiers and ADCs in handheld ECG or pulse oximeter units. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying analog front-end and microcontroller core voltage. Use Value: Ultra-low 50µA quiescent current extends single-cell coin-cell or Li-ion battery life beyond 12 months in standby mode. | Use Scenario: Providing clean 2.8V rail to image sensor and ISP in compact digital cameras. IC Role / Device Role / Timing Role: Post-regulator for noisy SMPS-derived 3.3V input, delivering low-noise 2.8V for pixel readout circuits. Use Value: 260nV/√Hz output noise and 50dB PSRR suppress switching artifacts that cause image banding or fixed-pattern noise. |
| GSM/PHS Handheld Radios | Linear Post-Regulator for SMPS |
Use Scenario: Supplying 2.8V to RF transceiver ICs and baseband processors in cellular handsets. IC Role / Device Role / Timing Role: Low-dropout regulator enabling operation from partially discharged Li-ion (down to ~3.04V). Use Value: 240mV dropout at 300mA allows >90% battery utilization before brownout, improving talk time. | Use Scenario: Cleaning up 3.3V or 5.0V switch-mode supply outputs for noise-sensitive analog subsystems. IC Role / Device Role / Timing Role: Secondary linear regulator placed after primary DC/DC converter to reduce ripple and EMI. Use Value: 50dB PSRR below 120Hz and 260nV/√Hz noise enable use in precision DACs, audio codecs, and PLLs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/MB | 250mA max output, 1.6µA quiescent current, SOT-23-5 package | Lower IQ ideal for ultra-low-power IoT sensors; lower current rating limits use in higher-load peripherals | Select when <100mA load and multi-year battery life are priorities over peak current capability |
| TCS2117-2.8V | 300mA output, 60µA IQ, 350mV dropout at 300mA, same MSOP-8 footprint | Slightly higher dropout and IQ; lacks bypass pin for noise optimization | Choose if board space matches and noise sensitivity is moderate; not suitable for ultra-quiet analog rails |
Compared with MCP1700T-2802E/MB, TC1269-2.8VUATR delivers 20% higher output current and integrated bypass noise reduction - critical for mixed-signal SoCs. Versus TCS2117-2.8V, it achieves 110mV lower dropout and 10µA lower IQ, directly enabling longer runtime from marginal input voltages.
Availability
TC1269-2.8VUATR is available at Aetrix Electronics and suitable for battery-operated medical instruments, portable digital cameras, GSM/PHS handsets, and linear post-regulator designs requiring stable component supply, long-lifecycle support, and consistent parametric performance.
Supply support for TC1269-2.8VUATR 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 TC1269 series was developed as a CMOS-based upgrade to legacy bipolar LDOs - targeting portable, battery-critical applications where ultra-low quiescent current, low noise, and small footprint are essential.
FAQ
What is the minimum input voltage required for TC1269-2.8VUATR to maintain regulation?
The TC1269-2.8VUATR requires VIN ≥ VOUT + dropout voltage. At 300mA load, dropout is 240mV (max), so minimum input is 3.04V. At lighter loads (e.g., 0.1mA), dropout drops to 20mV, allowing operation down to 2.82V. Input must stay within 2.8V–6.0V operating range per datasheet specifications.
Can TC1269-2.8VUATR be used without connecting the Bypass pin?
Yes, the Bypass pin (Pin 5) may be left unconnected if output noise performance is not critical. However, connecting a 470pF capacitor from Bypass to GND reduces output noise to 260nV/√Hz - essential for precision analog circuits. Larger capacitors increase startup time but do not harm functionality.
Does TC1269-2.8VUATR require an input capacitor?
An input capacitor is recommended: 1µF ceramic or tantalum placed close to VIN (Pin 8) and GND (Pin 4). It is mandatory when using battery sources or when >10 inches of wiring exists between the regulator and upstream filter capacitor - to stabilize input impedance and improve transient response.
How does TC1269-2.8VUATR behave during thermal shutdown?
When junction temperature exceeds ~150°C, TC1269-2.8VUATR disables output and halts regulation. It remains off until die temperature falls to ~140°C, then automatically resumes normal operation. This cycle protects against permanent damage during sustained overload or poor heatsinking conditions.
Is TC1269-2.8VUATR compatible with ceramic output capacitors?
Yes, TC1269-2.8VUATR is stable with ceramic output capacitors ≥1µF. The datasheet specifies ESR between 0.1Ω and 5.0Ω, which standard X5R/X7R ceramics meet when derated for DC bias. No series resistor is needed, simplifying layout and reducing cost versus tantalum alternatives.
TC1269-2.8VUATR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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:
- 50dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
TC1269-2.8VUATR FAQ
1.How can I place an order for TC1269-2.8VUATR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1269-2.8VUATR 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 TC1269-2.8VUATR reliable?
The price and inventory of TC1269-2.8VUATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1269-2.8VUATR is usually 5 days.
3.What payment methods are accepted for TC1269-2.8VUATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1269-2.8VUATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1269-2.8VUATR?
TC1269-2.8VUATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1269-2.8VUATR 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 TC1269-2.8VUATR?
For technical support, including TC1269-2.8VUATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1269-2.8VUATR requirements.
6.How does Aetrix verify that TC1269-2.8VUATR is sourced from the original manufacturer or authorized distributors?
All TC1269-2.8VUATR 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 TC1269-2.8VUATR meets industry standards.
7.What is the process for return or replacement of TC1269-2.8VUATR?
All TC1269-2.8VUATR units undergo pre-shipment inspection (PSI). If there is an issue with TC1269-2.8VUATR, 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 TC1269-2.8VUATR part is unused and in its original packaging.
Return procedure for TC1269-2.8VUATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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