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Microchip Technology TC1269-2.5VUA
- Part No.:
- TC1269-2.5VUA
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1269-2.5VUA.pdf
- Description:
- IC REG LINEAR 2.5V 300MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,433
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Product details
Overview
TC1269-2.5VUA from Microchip Technology is a fixed-output, high-accuracy (±0.5%) CMOS low-dropout linear regulator delivering 300mA at 2.5V with ultra-low ground current (50µA typical), 240mV dropout at full load, and integrated shutdown control - deployed in battery-powered medical instruments and portable computing systems.
For engineers reviewing the TC1269-2.5VUA datasheet, TC1269-2.5VUA pinout, TC1269-2.5VUA application, or TC1269-2.5VUA equivalent, key selection criteria include output voltage accuracy, thermal shutdown behavior, Bypass input noise reduction capability, and MSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The TC1269-2.5VUA uses a CMOS pass element to achieve stable regulation across 0–300mA load range without supply current increase - unlike legacy bipolar LDOs - enabling precise voltage maintenance for RTC and CMOS RAM backup circuits. Its internal reference bypass input accepts a 470pF capacitor to reduce output noise to 260nV/√Hz at 1kHz.
Thermal protection activates at 150°C junction temperature, with automatic recovery at ~140°C; over-current protection limits short-circuit output current to 550–650mA. Shutdown mode reduces supply current to 0.05µA typical while forcing VOUT to zero.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±0.5% (ensures stable power for precision analog and low-voltage logic) |
| Max Output Current | 300mA (supports moderate-power peripherals without external boost) |
| Dropout Voltage | 240mV at 300mA (enables operation down to VIN = 2.74V for 2.5V output) |
| Ground Current | 50µA typical at full load (extends battery life vs. bipolar regulators by 20–60×) |
| PSRR | 50dB at ≤120Hz (rejects ripple from upstream SMPS in post-regulation applications) |
| Output Noise | 260nV/√Hz at 1kHz (ultra-quiet for sensitive ADCs, sensors, RF bias rails) |
| Shutdown Current | 0.05µA typical (minimizes standby drain in always-on portable systems) |
| Operating Temp | -40°C to +125°C (supports industrial and automotive under-hood environments) |
Pinout & Package
TC1269-2.5VUA is housed in an 8-pin MSOP package (3.0mm × 3.0mm, 0.65mm pitch) 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 2.5V to load; requires ≥1µF output capacitor for stability |
| NC (Pins 2, 3, 6) | No connect | Must remain unconnected; no internal connection 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 |
| SHDN (Pin 7) | Shutdown control | Logic-high (>45% VIN) enables regulator; logic-low (<15% VIN) disables output and cuts supply current to 0.05µA |
| VIN (Pin 8) | Unregulated input | Accepts 2.74V–6.0V input; must be decoupled with ≥1µF capacitor if sourced from battery or long traces |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ground current | 50µA typical at full load - critical for multi-year battery life in portable medical devices |
| Fixed 2.5V output accuracy | ±0.5% over -40°C to +125°C - eliminates need for external trimming in precision analog rails |
| Bypass-enabled noise reduction | 260nV/√Hz output noise with 470pF on Bypass pin - meets low-noise requirements for RF front-ends and high-resolution ADCs |
| Integrated protection | Over-temperature shutdown (150°C trip) and over-current limiting (550–650mA) - prevents damage during fault conditions without external circuitry |
| Fast transient response | Maintains regulation during rapid load steps - essential for microcontroller core voltage stabilization during burst-mode operation |
| Stable with 1µF output cap | Eliminates need for large, costly tantalum or ceramic capacitors - reduces BOM cost and board area |
Applications
| Medical Instrumentation | Portable Computing |
|---|---|
Use Scenario: Powering analog front-end circuitry and real-time clock (RTC) in handheld ultrasound or glucose meters. IC Role / Device Role / Timing Role: Primary 2.5V LDO supplying precision sensor signal chain and nonvolatile memory backup. Use Value: ±0.5% output accuracy and 260nV/√Hz noise ensure measurement integrity; 50µA ground current extends single-cell Li-ion battery life beyond 3 years. | Use Scenario: Post-regulating switched-mode power supply (SMPS) outputs for CPU I/O or memory interface rails in sub-notebook designs. IC Role / Device Role / Timing Role: Low-noise linear post-regulator ensuring clean 2.5V for DDR termination or PCIe reference clocks. Use Value: 50dB PSRR at 120Hz suppresses SMPS switching ripple; 240mV dropout allows operation from 2.74V input - maximizing usable battery voltage range. |
| Cellular/GSM Phones | Digital Cameras |
Use Scenario: Supplying baseband processor auxiliary rails and SIM card interface in dual-mode GSM/PHS handsets. IC Role / Device Role / Timing Role: Shutdown-controlled 2.5V rail enabling deep-sleep modes during idle periods. Use Value: 0.05µA shutdown current minimizes leakage in always-connected standby states; MSOP-8 footprint fits tight RF module layouts. | Use Scenario: Biasing CCD/CMOS image sensor analog blocks and autofocus motor drivers in compact digital cameras. IC Role / Device Role / Timing Role: Stable 2.5V source for sensor analog supply and timing generator reference. Use Value: Thermal regulation of 0.04V/W ensures consistent exposure calibration across operating temperatures; 300mA output supports brief high-current autofocus pulses. |
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 SOT-23-5 package; 250mA max output; 1.6µA quiescent current (no shutdown) | Lacks shutdown and Bypass input; unsuitable for noise-sensitive or battery-off-state applications | Select only when ultra-low IQ dominates over noise and control features |
| TCS2102-2.5V | 2.5V output, 300mA, MSOP-8, but 120mV dropout and 100µA IQ; no Bypass pin | Higher ground current erodes battery life; missing noise-reduction path limits use in precision analog | Consider only if lower dropout is prioritized and noise is not critical |
Compared with MCP1700-2502E/TO and TCS2102-2.5V, TC1269-2.5VUA uniquely combines shutdown control, Bypass-enabled ultra-low noise, and ±0.5% accuracy in an MSOP-8 - making it optimal for battery-powered instrumentation where both standby efficiency and signal integrity are mandatory.
Availability
TC1269-2.5VUA is available at Aetrix Electronics and suitable for battery-operated medical instruments, portable computing subsystems, and cellular phone power management requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for TC1269-2.5VUA 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 and global technical support.
The TC1269 family was designed as a CMOS-based upgrade to legacy bipolar LDOs - targeting high-accuracy, low-noise, low-quiescent-current regulation for portable and battery-critical applications.
FAQ
What is the maximum input voltage rating for TC1269-2.5VUA?
The absolute maximum input voltage for TC1269-2.5VUA is 6.5V, but the recommended operating input voltage is up to 6.0V per electrical specifications. Exceeding 6.5V risks permanent damage. The device is typically used with inputs between 2.74V (to maintain 2.5V output at 300mA) and 5.5V in battery-powered systems. Always observe derating guidelines in Section 4.0 of the DS21380C datasheet when calculating worst-case power dissipation for TC1269-2.5VUA.
Does TC1269-2.5VUA require an external capacitor on the Bypass pin?
No, the Bypass pin (Pin 5) of TC1269-2.5VUA is optional: connecting a 470pF capacitor to ground reduces output noise to 260nV/√Hz at 1kHz, but leaving it unconnected still yields functional regulation. Larger capacitors increase startup time to rated output voltage. The decision depends on system noise sensitivity - for example, TC1269-2.5VUA in digital camera sensor bias rails benefits from the capacitor, whereas in basic microcontroller I/O supply it may be omitted.
How does TC1269-2.5VUA behave during thermal shutdown?
When the TC1269-2.5VUA junction temperature exceeds 150°C, its internal thermal protection circuit disables the output and halts regulation. The device remains off until the die cools to approximately 140°C, at which point it automatically resumes normal operation. This hysteresis prevents oscillation near the trip point. During shutdown, VOUT falls to zero and supply current drops to baseline levels - a behavior confirmed in the DS21380C datasheet's Section 4.1 and validated across the full -40°C to +125°C operating range for TC1269-2.5VUA.
Can TC1269-2.5VUA be used without the shutdown feature?
Yes - TC1269-2.5VUA operates continuously when the SHDN pin (Pin 7) is tied directly to VIN, since VIH threshold is defined as >45% of VIN. This configuration eliminates external control logic and is common in fixed-rail applications like linear post-regulators for SMPS. The device retains all other features including over-temperature and over-current protection. No pull-up resistor is required; direct VIN connection ensures reliable enablement across input voltage variations for TC1269-2.5VUA.
What output capacitor value is required for stable operation of TC1269-2.5VUA?
TC1269-2.5VUA is stable with a minimum 1µF output capacitor (ceramic or tantalum), as specified in the DS21380C datasheet Section 3.2. The capacitor must have ESR between 0.1Ω and 5.0Ω and resonant frequency above 1MHz. Aluminum electrolytics are acceptable above -25°C; solid tantalums are preferred for sub-zero operation. Using less than 1µF risks instability and load-transient overshoot - a critical constraint verified in characterization data for TC1269-2.5VUA across temperature and load conditions.
TC1269-2.5VUA 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):
- 2.5V
- 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
TC1269-2.5VUA FAQ
1.How can I place an order for TC1269-2.5VUA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1269-2.5VUA 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 TC1269-2.5VUA reliable?
The price and inventory of TC1269-2.5VUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1269-2.5VUA is usually 5 days.
3.What payment methods are accepted for TC1269-2.5VUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1269-2.5VUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1269-2.5VUA?
TC1269-2.5VUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1269-2.5VUA 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 TC1269-2.5VUA?
For technical support, including TC1269-2.5VUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1269-2.5VUA requirements.
6.How does Aetrix verify that TC1269-2.5VUA is sourced from the original manufacturer or authorized distributors?
All TC1269-2.5VUA 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 TC1269-2.5VUA meets industry standards.
7.What is the process for return or replacement of TC1269-2.5VUA?
All TC1269-2.5VUA units undergo pre-shipment inspection (PSI). If there is an issue with TC1269-2.5VUA, 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 TC1269-2.5VUA part is unused and in its original packaging.
Return procedure for TC1269-2.5VUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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