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Microchip Technology TC1269-3.3VUATR
- Part No.:
- TC1269-3.3VUATR
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1269-3.3VUATR.pdf
- Description:
- IC REG LINEAR 3.3V 300MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,313
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Product details
Overview
TC1269-3.3VUATR from Microchip Technology is a fixed-output, 3.3V CMOS low-dropout (LDO) linear regulator in an 8-pin MSOP package, delivering up to 300mA output current with ±0.5% output voltage accuracy, 240mV dropout at full load, and 50μA typical supply current. It serves as a precision post-regulator in battery-powered portable electronics requiring ultra-low noise and high efficiency.
For engineers reviewing the TC1269-3.3VUATR datasheet, TC1269-3.3VUATR pinout, TC1269-3.3VUATR application, or TC1269-3.3VUATR equivalent, key selection criteria include its 300mA output capability, shutdown current of 0.05μA, Bypass input for noise reduction, thermal/overcurrent protection, and compatibility with 1μF minimum output capacitance.
Technical Context
The TC1269-3.3VUATR implements a CMOS-based regulation architecture that maintains stable output voltage across 0–300mA load range without increasing supply current with load - unlike legacy bipolar LDOs. Its internal reference is bypassable via a dedicated pin to reduce output noise to 260nV/√Hz at 1kHz.
It features active shutdown control (SHDN pin), overtemperature shutdown at ~150°C, and foldback overcurrent protection limiting short-circuit current to 550–650mA. Stability is guaranteed with only 1μF ceramic or tantalum output capacitance and ESR between 0.1Ω and 5.0Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±0.5% (±16.5mV) - ensures tight regulation for 3.3V logic rails and analog subsystems. |
| Max Output Current | 300mA - supports moderate-power microcontrollers, sensors, and RF front-ends without external boost. |
| Dropout Voltage | 240mV at 300mA - enables operation down to VIN = 3.54V, critical for single-cell Li-ion or 3.6V battery systems. |
| Supply Current | 50μA typical at full load - extends battery life significantly vs. bipolar regulators (20–60× lower). |
| Shutdown Current | 0.05μA typical - reduces standby power to negligible levels in sleep-mode portable devices. |
| Output Noise | 260nV/√Hz at 1kHz - low enough for sensitive ADC references and RF power amplifiers when Bypass pin is used. |
| PSRR | 50dB at ≤120Hz - suppresses ripple from upstream SMPS stages in hybrid power architectures. |
Pinout & Package
TC1269-3.3VUATR is housed in an 8-pin MSOP (Mini Small Outline Package) with 0.65mm pitch, 3.0mm × 3.0mm body, and exposed pad not connected internally. Pin 1 is marked by a dot or beveled corner; pins are numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated output | Delivers stable 3.3V to load; requires ≥1μF capacitor to GND for stability and transient response. |
| NC (Pin 2) | No connect | Internally unconnected; must remain floating or grounded per layout best practice - no routing required. |
| NC (Pin 3) | No connect | Internally unconnected; same handling as Pin 2 - no electrical function. |
| GND (Pin 4) | Ground reference | Primary return path for load and internal circuitry; must tie to low-impedance system ground plane. |
| Bypass (Pin 5) | Reference bypass input | Accepts 470pF capacitor to GND to reduce internal reference noise and lower output noise by >50%. |
| NC (Pin 6) | No connect | Internally unconnected; no routing or termination needed. |
| SHDN (Pin 7) | Active-high 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 2.5V–6.0V input; requires local 1μF decoupling if >10" wire length or battery source is used. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ground current | 50μA at full 300mA load - enables multi-year battery life in always-on medical monitors and IoT endpoints. |
| Low-noise Bypass input | Dedicated Pin 5 accepts 470pF capacitor to cut output noise by >50%, supporting precision analog signal chains. |
| Fast load transient response | Maintains regulation during rapid load steps (e.g., MCU wake-up bursts) due to CMOS pass device and low output impedance. |
| Thermal & overcurrent protection | Auto-shutdown at ~150°C junction temperature and current foldback limit (~600mA) prevent damage under fault conditions. |
| Wide input voltage range | Operates from 2.5V to 6.0V - compatible with single-cell Li-ion (3.0–4.2V), 3.3V/5V rails, and dual-cell alkaline inputs. |
Applications
| Battery-Powered Medical Sensors | Portable Digital Cameras |
|---|---|
Use Scenario: Continuous glucose monitor with Bluetooth LE radio and low-power ADC sampling every 5 minutes. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying MCU core, BLE transceiver, and sensor interface - enabled only during active measurement cycles. Use Value: 0.05μA shutdown current extends CR2032 coin cell life beyond 2 years; 240mV dropout allows operation until battery drops to 3.54V. |
Use Scenario: Image capture sequence in compact digital camera with flash LED, image sensor, and SD card interface. IC Role / Device Role / Timing Role: Post-regulator for clean 3.3V rail feeding CMOS image sensor and SDIO controller during burst write operations. Use Value: 260nV/√Hz noise floor (with Bypass cap) prevents fixed-pattern noise in raw image data; 300mA peak current handles simultaneous sensor + flash load. |
| GSM/PHS Handheld Radios | Linear Post-Regulator for SMPS |
Use Scenario: Dual-mode GSM/PHS phone requiring quiet 3.3V supply for baseband processor and RF synthesizer during voice call. IC Role / Device Role / Timing Role: Low-noise LDO filtering switching noise from primary buck converter powering RF section. Use Value: 50dB PSRR at 120Hz attenuates SMPS ripple; Bypass pin reduces phase noise in VCO tuning voltage path. |
Use Scenario: Industrial PLC I/O module using 12V input with buck converter stepping to 5V, followed by TC1269-3.3VUATR for isolated 3.3V logic. IC Role / Device Role / Timing Role: Final-stage regulator providing tightly regulated, low-noise 3.3V for FPGA configuration and communication peripherals. Use Value: ±0.5% output accuracy ensures reliable FPGA startup; 1μF min output cap simplifies layout in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3302E/TO | 250mA max output, 6μA quiescent current, SOT-23-5 package, no Bypass pin. | Lacks noise-reduction capability; suited for ultra-low-IQ applications where 300mA is not required. | Choose MCP1700-3302E/TO only if board space is constrained and noise sensitivity is low - not a drop-in replacement. |
| TCS2117-33IDBVR | 300mA output, 45μA IQ, 220mV dropout at 300mA, 8-pin WSON package, no SHDN pin. | Fixed enable-only operation; no shutdown mode - unsuitable for battery systems requiring deep sleep. | Select TCS2117-33IDBVR only for always-on industrial sensors where shutdown is unnecessary and WSON footprint is preferred. |
Compared with TC1269-3.3VUATR, MCP1700-3302E/TO trades output current and noise performance for lower quiescent current and smaller package, while TCS2117-33IDBVR offers slightly lower dropout but eliminates shutdown control - making TC1269-3.3VUATR uniquely balanced for portable systems needing 300mA, ultra-low noise, and sub-μA shutdown.
Availability
TC1269-3.3VUATR is available at Aetrix Electronics and suitable for battery-operated medical instruments, portable digital cameras, and GSM/PHS handheld radios requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TC1269-3.3VUATR 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 design and wafer fabrication facilities.
The TC1269 product line delivers high-accuracy, low-noise CMOS LDO regulators targeting portable and battery-sensitive applications - designed to replace legacy bipolar regulators with superior efficiency and noise performance.
FAQ
What is the maximum input voltage rating for TC1269-3.3VUATR?
The absolute maximum input voltage for TC1269-3.3VUATR is 6.5V, but the recommended operating range is up to 6.0V per Electrical Characteristics. 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 TC1269-3.3VUATR require an external capacitor on the Bypass pin?
No - the Bypass pin (Pin 5) of TC1269-3.3VUATR is optional. Connecting a 470pF capacitor to ground reduces output noise by >50% at 1kHz, but the device operates fully functional without it. Omit the capacitor only if noise sensitivity is low and PSRR meets system requirements.
Can TC1269-3.3VUATR be used with ceramic output capacitors?
Yes - TC1269-3.3VUATR is stable with ceramic output capacitors ≥1μF, provided their effective series resistance (ESR) is between 0.1Ω and 5.0Ω and resonant frequency exceeds 1MHz. X5R/X7R dielectrics are recommended; avoid low-ESR types below 0.1Ω unless verified with load transient testing.
What happens to the output voltage of TC1269-3.3VUATR during shutdown?
When the SHDN pin of TC1269-3.3VUATR is pulled low (<15% VIN), the regulator fully disables: VOUT falls to 0V, and supply current drops to 0.05μA typical. This ensures zero static power draw and prevents backfeeding into the load - critical for battery isolation in sleep modes.
Is TC1269-3.3VUATR compatible with lead-free reflow soldering processes?
Yes - TC1269-3.3VUATR in MSOP package is rated for standard lead-free reflow profiles (J-STD-020), with peak temperature tolerance up to 260°C. The device complies with RoHS Directive 2011/65/EU and is manufactured using halogen-free materials per Microchip's packaging specifications.
TC1269-3.3VUATR 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):
- 3.3V
- 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
TC1269-3.3VUATR FAQ
1.How can I place an order for TC1269-3.3VUATR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1269-3.3VUATR 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 TC1269-3.3VUATR reliable?
The price and inventory of TC1269-3.3VUATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1269-3.3VUATR is usually 5 days.
3.What payment methods are accepted for TC1269-3.3VUATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1269-3.3VUATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1269-3.3VUATR?
TC1269-3.3VUATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1269-3.3VUATR 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 TC1269-3.3VUATR?
For technical support, including TC1269-3.3VUATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1269-3.3VUATR requirements.
6.How does Aetrix verify that TC1269-3.3VUATR is sourced from the original manufacturer or authorized distributors?
All TC1269-3.3VUATR 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 TC1269-3.3VUATR meets industry standards.
7.What is the process for return or replacement of TC1269-3.3VUATR?
All TC1269-3.3VUATR units undergo pre-shipment inspection (PSI). If there is an issue with TC1269-3.3VUATR, 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 TC1269-3.3VUATR part is unused and in its original packaging.
Return procedure for TC1269-3.3VUATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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