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Microchip Technology TC1269-2.8VUA
- Part No.:
- TC1269-2.8VUA
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1269-2.8VUA.pdf
- Description:
- IC REG LINEAR 2.8V 300MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,341
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Product details
Overview
TC1269-2.8VUA from Microchip Technology is a fixed-output, high-accuracy (±0.5%) CMOS low-dropout linear regulator delivering 300mA at 2.8V with typical dropout of 240mV at full load, ultra-low ground current (50µA typ), and integrated shutdown control - used in battery-powered medical instruments and portable computing systems.
For engineers reviewing the TC1269-2.8VUA datasheet, TC1269-2.8VUA pinout, TC1269-2.8VUA application, or TC1269-2.8VUA equivalent, key selection criteria include output voltage accuracy, shutdown quiescent current (0.05µA typ), thermal/overcurrent protection, MSOP-8 package compatibility, and bypass-capacitor–enabled noise reduction (260nV/√Hz).
Technical Context
The TC1269-2.8VUA implements a CMOS-based LDO architecture with internal reference bypass capability via dedicated Bypass pin, enabling 470pF capacitor connection to reduce output noise. It maintains regulation across 0–300mA load range without supply current increase - unlike legacy bipolar regulators.
Shutdown logic is TTL/CMOS-compatible: SHDN ≥45% VIN enables regulation; ≤15% VIN forces shutdown with VOUT = 0V and ISS2 = 0.05µA (typ). Thermal shutdown activates at 150°C junction temperature, with automatic recovery at ~140°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8V ±0.5% (ensures stable power for 2.8V logic rails and analog sensors) |
| Max Output Current | 300mA (supports moderate-power microcontrollers and RF modules) |
| Dropout Voltage | 240mV at 300mA (enables operation from 3.04V input in battery-depleted conditions) |
| Ground Current | 50µA typical at full load (extends battery life vs. bipolar LDOs by 20–60×) |
| Shutdown Current | 0.05µA typical (enables multi-year standby in portable instrumentation) |
| Output Noise | 260nV/√Hz at 1kHz (low-noise performance critical for ADC references and precision analog) |
| PSRR | 50dB ≤120Hz (effective rejection of switching regulator ripple in post-regulation) |
| Operating Temp | -40°C to +125°C (qualified for industrial and automotive under-hood environments) |
Pinout & Package
TC1269-2.8VUA is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 1.1mm) with exposed pad for thermal enhancement. Pin 1 is VOUT; pins 2, 3, and 6 are no-connect; pin 4 is GND; pin 5 is Bypass; pin 7 is SHDN; pin 8 is VIN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated output | Delivers stable 2.8V to load; requires ≥1µF output capacitor for stability |
| NC (Pins 2, 3, 6) | No connect | Must remain unconnected; no internal bonding or function |
| GND (Pin 4) | Ground reference | Primary return path for load and internal circuitry; connects to system ground plane |
| Bypass (Pin 5) | Reference bypass input | Accepts 470pF capacitor to ground to reduce internal reference noise and lower output noise to 260nV/√Hz |
| SHDN (Pin 7) | Active-high enable | Logic high (≥45% VIN) enables regulation; logic low (≤15% VIN) disables output and reduces supply current to 0.05µA |
| VIN (Pin 8) | Unregulated input | Accepts 2.8V to 6.0V input; must be decoupled with ≥1µF capacitor when sourced from battery or long traces |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 240mV at 300mA enables use with single-cell Li-ion (3.0V min) or 3.3V SMPS rails |
| High accuracy output | ±0.5% initial tolerance ensures reliable operation of 2.8V I/O interfaces and ADC references |
| Bypass-enabled noise reduction | Dedicated Bypass pin with 470pF support cuts output noise to 260nV/√Hz for sensitive analog circuits |
| Integrated protection | Auto-recovering overtemperature (150°C trip) and current-limit (550–650mA) prevent damage during fault conditions |
| MSOP-8 footprint | 3.0mm × 3.0mm body enables high-density PCB layouts in space-constrained portable designs |
| Shutdown mode | 0.05µA quiescent current in shutdown extends battery life in intermittent-use devices like handheld meters |
Applications
| Battery-Powered Medical Instruments | Portable Computing Subsystems |
|---|---|
Use Scenario: Powering low-power ECG front-end amplifiers and ADCs in handheld patient monitors. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying analog signal chain with ultra-low noise and tight voltage regulation. Use Value: 260nV/√Hz noise and ±0.5% accuracy preserve signal integrity for sub-microvolt biomedical measurements. | Use Scenario: Regulating 2.8V supply for Wi-Fi/BT SoC I/O banks and memory interfaces in ultraportable laptops. IC Role / Device Role / Timing Role: Post-regulator after buck converter, providing clean, accurate voltage for digital I/O domains. Use Value: 50µA ground current and fast load transient response maintain efficiency and stability during burst-mode wireless activity. |
| Cellular/GSM Handsets | Linear Post-Regulator for SMPS |
Use Scenario: Supplying 2.8V to baseband processor core logic and RF transceiver bias circuits in dual-SIM GSM phones. IC Role / Device Role / Timing Role: Low-noise, shutdown-capable LDO managing power sequencing and battery conservation modes. Use Value: 0.05µA shutdown current and 240mV dropout extend talk time and enable deep-sleep states below 1µA system leakage. | Use Scenario: Cleaning output of 3.3V buck converter feeding 2.8V FPGA configuration banks and PLL analog supplies. IC Role / Device Role / Timing Role: Precision low-noise linear regulator removing switching artifacts from SMPS output. Use Value: 50dB PSRR at ≤120Hz and 260nV/√Hz noise ensure jitter-free clock generation and reliable FPGA configuration. |
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, SOT-23-5 package, 250mA max, 1.6µA quiescent current (no shutdown) | Lacks shutdown pin and Bypass input; lower max current limits use in higher-load scenarios | Select when board space is constrained and shutdown is managed externally |
| TCS2117-2.8 | 2.8V output, MSOP-8, 300mA, 65µA ground current, no Bypass pin, 350mV dropout at 300mA | Higher dropout and no noise-reduction bypass; suitable where ultra-low noise is not required | Select when cost sensitivity outweighs noise performance and thermal margin is sufficient |
Compared with MCP1700-2802E/TO and TCS2117-2.8, TC1269-2.8VUA uniquely combines 300mA capability, 240mV dropout, 0.05µA shutdown current, and Bypass-enabled 260nV/√Hz noise - making it optimal for noise-sensitive, battery-critical applications where MSOP-8 layout is acceptable.
Availability
TC1269-2.8VUA is available at Aetrix Electronics and suitable for battery-operated medical instruments, portable computing subsystems, cellular handsets, and linear post-regulation requiring stable component supply across industrial temperature ranges.
Supply support for TC1269-2.8VUA 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 fabrication facilities.
The TC1269 family was designed as a CMOS upgrade to legacy bipolar LDOs - targeting battery longevity, low-noise analog power, and compact packaging for portable and medical electronics.
FAQ
What is the maximum input voltage rating for TC1269-2.8VUA?
The absolute maximum input voltage for TC1269-2.8VUA is 6.5V, but the recommended operating input voltage is up to 6.0V per electrical specifications. Exceeding 6.0V risks violating safe operating area limits and may trigger thermal shutdown or degrade long-term reliability. Always maintain VIN ≤6.0V in normal operation.
Does TC1269-2.8VUA require an external capacitor on the Bypass pin?
TC1269-2.8VUA does not require an external capacitor on the Bypass pin - it functions correctly without one. However, connecting a 470pF capacitor from Bypass to GND reduces output noise to 260nV/√Hz. Larger values increase startup time; omission increases noise but preserves fast turn-on behavior.
What is the minimum output capacitance required for TC1269-2.8VUA stability?
TC1269-2.8VUA requires a minimum 1µF output capacitor from VOUT to GND for guaranteed stability. The capacitor must have ESR between 0.1Ω and 5.0Ω and resonant frequency above 1MHz. Aluminum electrolytic or solid tantalum types are recommended - especially tantalum for operation below -25°C.
How does TC1269-2.8VUA behave during thermal shutdown?
When TC1269-2.8VUA junction temperature exceeds 150°C, its internal thermal protection circuit disables regulation, dropping VOUT to 0V and halting output current. Regulation automatically resumes once die temperature falls to approximately 140°C. This cycle prevents permanent damage but causes temporary power loss to the load.
Can TC1269-2.8VUA be used without connecting the SHDN pin?
Yes - TC1269-2.8VUA can be used with SHDN unconnected only if tied directly to VIN. Leaving SHDN floating is not allowed. Connecting SHDN to VIN ensures full enablement (ISS1 = 50µA typ); this is standard practice when shutdown functionality is unnecessary in the design.
TC1269-2.8VUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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
TC1269-2.8VUA FAQ
1.How can I place an order for TC1269-2.8VUA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1269-2.8VUA 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 TC1269-2.8VUA reliable?
The price and inventory of TC1269-2.8VUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1269-2.8VUA is usually 5 days.
3.What payment methods are accepted for TC1269-2.8VUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1269-2.8VUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1269-2.8VUA?
TC1269-2.8VUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1269-2.8VUA 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 TC1269-2.8VUA?
For technical support, including TC1269-2.8VUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1269-2.8VUA requirements.
6.How does Aetrix verify that TC1269-2.8VUA is sourced from the original manufacturer or authorized distributors?
All TC1269-2.8VUA 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 TC1269-2.8VUA meets industry standards.
7.What is the process for return or replacement of TC1269-2.8VUA?
All TC1269-2.8VUA units undergo pre-shipment inspection (PSI). If there is an issue with TC1269-2.8VUA, 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 TC1269-2.8VUA part is unused and in its original packaging.
Return procedure for TC1269-2.8VUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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