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Microchip Technology TC1173-3.3VUATR
- Part No.:
- TC1173-3.3VUATR
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1173-3.3VUATR.pdf
- Description:
- IC REG LINEAR 3.3V 300MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,379
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Product details
Overview
TC1173-3.3VUATR from Microchip Technology is a precision CMOS low-dropout linear regulator delivering 3.3V ±0.5% output at up to 300mA, with 240mV typical dropout at full load, 50µA typical supply current, and an open-drain ERROR flag for low-input or overcurrent detection-used in battery-powered medical instruments and portable computing systems.
For engineers reviewing the TC1173-3.3VUATR datasheet, TC1173-3.3VUATR pinout, TC1173-3.3VUATR application, or TC1173-3.3VUATR equivalent, key selection criteria include ultra-low quiescent current (50µA), Bypass-capable noise reduction (260nV/√Hz), shutdown mode (0.05µA), thermal/overcurrent protection, and MSOP-8 compatibility with 1µF minimum output capacitance.
Technical Context
The TC1173-3.3VUATR employs CMOS pass transistor architecture enabling stable regulation across 0–300mA load without supply current increase-critical for RTC and backup RAM applications. Its internal feed-forward compensation ensures fast transient response to step-load changes.
ERROR is an open-drain output asserting low when VOUT drops >5% below 3.3V (i.e., ≤3.135V), with 50mV hysteresis referenced to VR; SHDN enables logic-controlled shutdown (VIH ≥45% VIN, VIL ≤15% VIN), reducing VOUT and supply current to zero.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±0.5% (±16.5mV) - ensures stable power for 3.3V logic and analog circuitry |
| Max Output Current | 300mA - supports moderate-power microcontrollers and sensors without external boost |
| Dropout Voltage | 240mV at 300mA - enables operation from 3.54V input, compatible with single-cell Li-ion or dual-cell alkaline |
| Supply Current | 50µA typical at full load - extends battery life significantly vs. bipolar LDOs (20–60× lower) |
| Shutdown Current | 0.05µA typical - preserves battery charge during system sleep or standby modes |
| Output Noise | 260nV/√Hz at 1kHz - low enough for noise-sensitive analog front-ends without additional filtering |
| PSRR | 60dB ≤1kHz - suppresses ripple from upstream SMPS in hybrid power architectures |
| Operating Temp | –40°C to +125°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
TC1173-3.3VUATR is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 1.1mm height), optimized for space-constrained portable designs and offering θJA ≈ 200°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 8) | Unregulated input supply | Accepts 2.7–6.0V; must exceed VOUT + dropout (≥3.54V for 3.3V output) |
| VOUT (Pin 1) | Regulated output | Delivers precise 3.3V ±0.5%; requires ≥1µF ceramic or tantalum capacitor to GND |
| GND (Pin 2) | Power ground reference | Primary return path; layout with low-impedance trace to minimize noise coupling |
| Bypass (Pin 4) | Reference bypass input | Connects to 470pF capacitor to reduce output noise by suppressing reference voltage fluctuations |
| ERROR (Pin 5) | Open-drain out-of-regulation flag | Pulls low when VOUT ≤3.135V; used directly as low-battery warning or with RC network as processor RESET |
| SHDN (Pin 6) | Logic-controlled shutdown enable | High (>45% VIN) enables regulation; low (<15% VIN) disables output and reduces IQ to 0.05µA |
| NC (Pins 3 & 7) | No-connect terminals | Not internally bonded; must remain unconnected per datasheet to avoid malfunction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50µA at full load enables multi-year battery life in always-on sensor nodes |
| Low-noise Bypass input | 470pF on Bypass pin reduces output noise to 260nV/√Hz-critical for ADC reference and RF bias rails |
| Integrated protection | Thermal shutdown (150°C trip) and foldback current limiting prevent damage during overload or ambient extremes |
| Fast load transient response | Feed-forward compensation maintains regulation within ±1% during 100mA step loads, avoiding brownouts |
| Minimal external components | Stable with only 1µF output capacitor-reduces BOM count and PCB area vs. legacy LDOs requiring ≥10µF |
Applications
| Portable Medical Sensors | Industrial Handheld Terminals |
|---|---|
Use Scenario: Continuous glucose monitor powered by coin-cell battery with Bluetooth LE transmission. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying MCU, analog front-end, and BLE radio; ERROR monitors battery depletion. Use Value: 50µA supply current extends operational life beyond 12 months; 240mV dropout allows use until battery reaches 3.54V. | Use Scenario: Ruggedized barcode scanner operating in warehouse environments with wide temperature swings. IC Role / Device Role / Timing Role: Post-regulator cleaning SMPS output for FPGA I/O banks and display interface. Use Value: –40°C to +125°C rating ensures reliability in uncontrolled storage; 60dB PSRR suppresses switching noise from 500kHz DC/DC converter. |
| Wearable Health Trackers | Smart Meter Data Loggers |
Use Scenario: Fitness band with heart-rate sensor, accelerometer, and OLED display running on rechargeable Li-Poly cell. IC Role / Device Role / Timing Role: Main system regulator enabling dynamic voltage scaling; SHDN controlled by PMU to gate power to inactive subsystems. Use Value: 0.05µA shutdown current minimizes leakage during deep-sleep cycles; Bypass pin lowers noise for clean sensor signal chain. | Use Scenario: Battery-backed AMI meter storing hourly consumption data during grid outages. IC Role / Device Role / Timing Role: Backup regulator powering real-time clock and SRAM during AC failure; ERROR triggers data flush before brownout. Use Value: ±0.5% output accuracy maintains RTC timing integrity; 5% ERROR threshold provides deterministic low-battery warning window. |
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 | Same 3.3V fixed output, but SOT-23-5 package; 2.5µA IQ (lower), 250mA max output (lower), no ERROR pin | Lacks out-of-regulation monitoring; suitable only where battery warning or reset signaling is unnecessary | Select when ultra-low IQ dominates over fault reporting and higher current capability |
| NCP1117ST33T3G | 3.3V adjustable version; TO-220/TO-263 package; 6mA IQ (much higher); 1A output; no shutdown or ERROR | Designed for high-current, non-battery applications; lacks power management features and compact footprint | Choose only for cost-sensitive, high-power linear post-regulation where size and battery life are secondary |
Compared with MCP1700-3302E/TO and NCP1117ST33T3G, TC1173-3.3VUATR uniquely balances ultra-low IQ (50µA), integrated ERROR flag, shutdown control, and 300mA capability in a space-saving MSOP-8-making it optimal for intelligent, battery-aware embedded systems requiring both efficiency and fault visibility.
Availability
TC1173-3.3VUATR is available at Aetrix Electronics and suitable for portable medical instruments, industrial handheld terminals, and wearable health trackers requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for TC1173-3.3VUATR 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 wafer fabrication and design centers worldwide.
The TC1173 product line was engineered specifically for battery-critical applications demanding ultra-low quiescent current, precise voltage regulation, and integrated fault signaling-targeting portable instrumentation, medical wearables, and energy-harvesting edge nodes.
FAQ
What is the minimum input voltage required for TC1173-3.3VUATR to maintain regulation?
The TC1173-3.3VUATR requires VIN ≥ VOUT + dropout voltage. With a typical 240mV dropout at 300mA, the minimum input is 3.54V. However, the absolute minimum specified VIN is 2.7V-valid only when load current is low enough that dropout remains ≤3.3V – 2.7V = 600mV. For reliable 300mA operation, 3.54V is the practical floor. The TC1173-3.3VUATR datasheet confirms this in Section 1.0 Electrical Characteristics.
Does TC1173-3.3VUATR require an external capacitor on the Bypass pin?
No, the Bypass pin on TC1173-3.3VUATR is optional. Connecting a 470pF capacitor reduces output noise to 260nV/√Hz; omitting it increases noise but does not affect regulation or stability. The TC1173-3.3VUATR remains fully functional with Bypass left unconnected-ideal when noise sensitivity is not critical and board space is constrained.
Can TC1173-3.3VUATR be used without connecting the SHDN pin?
Yes. If shutdown control is not needed, the SHDN pin of TC1173-3.3VUATR must be tied directly to VIN to ensure permanent enablement. Leaving SHDN floating is prohibited-it may cause erratic enable/disable behavior due to noise susceptibility. This connection method is explicitly recommended in Section 3.0 of the TC1173-3.3VUATR datasheet.
What is the purpose and electrical behavior of the ERROR pin on TC1173-3.3VUATR?
The ERROR pin on TC1173-3.3VUATR is an open-drain output that pulls low when VOUT falls ≥5% below nominal (i.e., ≤3.135V for 3.3V output), indicating undervoltage or overload. It features 50mV hysteresis and requires an external pull-up (to VIN, VOUT, or another valid rail). The TC1173-3.3VUATR ERROR function supports both low-battery alerts and processor RESET generation via an RC network, as detailed in Figure 3-2.
Is TC1173-3.3VUATR stable with ceramic output capacitors?
Yes. TC1173-3.3VUATR is stable with ceramic, tantalum, or aluminum electrolytic output capacitors ≥1µF, provided ESR is between 0.1Ω and 5.0Ω. Ceramic capacitors meet this requirement and are preferred for low-profile, high-reliability designs. The TC1173-3.3VUATR datasheet explicitly validates stability with 1µF ceramic in Section 3.2 and Figure 3-1.
TC1173-3.3VUATR 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:
- 60dB (1kHz)
- 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
TC1173-3.3VUATR FAQ
1.How can I place an order for TC1173-3.3VUATR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1173-3.3VUATR 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 TC1173-3.3VUATR reliable?
The price and inventory of TC1173-3.3VUATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1173-3.3VUATR is usually 5 days.
3.What payment methods are accepted for TC1173-3.3VUATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1173-3.3VUATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1173-3.3VUATR?
TC1173-3.3VUATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1173-3.3VUATR 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 TC1173-3.3VUATR?
For technical support, including TC1173-3.3VUATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1173-3.3VUATR requirements.
6.How does Aetrix verify that TC1173-3.3VUATR is sourced from the original manufacturer or authorized distributors?
All TC1173-3.3VUATR 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 TC1173-3.3VUATR meets industry standards.
7.What is the process for return or replacement of TC1173-3.3VUATR?
All TC1173-3.3VUATR units undergo pre-shipment inspection (PSI). If there is an issue with TC1173-3.3VUATR, 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 TC1173-3.3VUATR part is unused and in its original packaging.
Return procedure for TC1173-3.3VUATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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