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Microchip Technology TC1174VOATR
- Part No.:
- TC1174VOATR
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TC1174VOATR.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,313
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Product details
Overview
TC1174VOATR from Microchip Technology is an adjustable-output CMOS low-dropout linear regulator with shutdown control, 300mA output current, 50μA typical supply current, and 270mV typical dropout voltage at full load-designed for battery-powered instrumentation and portable communication devices requiring ultra-low-noise regulation.
For engineers reviewing the TC1174VOATR datasheet, TC1174VOATR pinout, TC1174VOATR application, or TC1174VOATR equivalent, key selection criteria include its adjustable output (via ADJ pin), Bypass input for noise reduction, thermal/overcurrent protection, and SOIC-8 package compatibility with industrial temperature range (-40°C to +125°C).
Technical Context
The TC1174VOATR uses a CMOS pass element enabling constant 50μA supply current across 0–300mA load, unlike bipolar LDOs. Its internal feed-forward compensation delivers fast transient response to load steps, while the 1.20V reference (±35mV) sets output via external resistor divider on the ADJ pin.
Shutdown is controlled by a logic-level SHDN input (VIH ≥ 45% VIN, VIL ≤ 15% VIN), reducing supply current to 0.05μA and forcing VOUT to 0V. The Bypass pin accepts a 470pF capacitor to reduce reference noise, lowering output noise to 260nV/√Hz at 10kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 300mA maximum-supports power rails for microcontrollers, sensors, and RF front-ends in compact portable systems. |
| Dropout Voltage | 270mV typical at 300mA-enables regulation from 2.7V input down to ~2.43V output, critical for single-cell Li-ion or alkaline battery operation. |
| Supply Current | 50μA typical at full load-20–60× lower than bipolar LDOs, extending battery life in always-on monitoring applications. |
| Reference Voltage | 1.20V ±35mV-stable reference enabling precise output adjustment from VREF to (VIN – 0.05V) using external resistors. |
| PSRR | 60dB at 1kHz-rejects ripple from upstream SMPS stages, making it suitable as a linear post-regulator. |
| Output Noise | 260nV/√Hz at 10kHz with 470pF Bypass capacitor-meets low-noise requirements for ADC references and RF bias supplies. |
| Thermal Shutdown | Activates at 150°C junction temperature, hysteresis returns operation at ~140°C-prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
TC1174VOATR is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with standard 1.27mm pitch, JEDEC MS-012AC compliant, footprint compatible with industry-standard SOIC-8 layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VOUT | Regulated output terminal | Delivers adjustable regulated voltage; requires ≥1μF output capacitor to ground for stability. |
| 2: GND | Ground reference | Primary return path for load, bias, and feedback currents; must be low-impedance connection to minimize noise and regulation error. |
| 3: NC | No-connect | Internally unconnected; must remain floating-no routing or soldering required. |
| 4: ADJ | Output voltage adjust input | Connects to resistor divider (R1/R2) between VOUT and GND; 50pA leakage enables high-value resistors (up to 3MΩ) to minimize quiescent current. |
| 5: Bypass | Reference bypass input | Accepts 470pF capacitor to GND to reduce internal reference noise; omission increases output noise by ~2×. |
| 6: SHDN | Active-high shutdown control | Logic-compatible input: VIH ≥ 45% VIN enables regulation; VIL ≤ 15% VIN disables output and reduces IQ to 0.05μA. |
| 7: NC | No-connect | Internally unconnected; must remain floating-no routing or soldering required. |
| 8: VIN | Unregulated input supply | Accepts 2.7–6.0V input; requires local 1μF capacitor if >10" wire length or battery source to suppress supply transients. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50μA typical across full 0–300mA load range-preserves battery capacity in always-on medical monitors and IoT endpoints. |
| Adjustable output voltage | Set via external resistor divider on ADJ pin; supports outputs from 1.2V up to (VIN – 0.05V), enabling flexible rail generation. |
| Bypass-enabled low-noise operation | 260nV/√Hz output noise with 470pF capacitor on Bypass pin-suitable for precision analog signal chains and RF biasing. |
| Integrated protection | Auto-recovering overtemperature shutdown (150°C trip) and foldback overcurrent limiting-eliminates need for external fault management circuitry. |
| Fast transient response | Internal feed-forward compensation minimizes output voltage deviation during 100mA load steps-critical for digital core supply stability. |
Applications
| Portable Medical Sensors | GSM/PHS Handset Power Rails |
|---|---|
|
Use Scenario: Continuous glucose monitor with low-power MCU, analog front-end, and Bluetooth LE radio operating from a single 3.0V coin cell. IC Role / Device Role / Timing Role: Primary LDO supplying 2.5V to ADC reference and 1.8V to BLE SoC core via resistor-divider configuration. Use Value: 50μA quiescent current extends battery life beyond 12 months; 260nV/√Hz noise ensures <12-bit ADC accuracy without additional filtering. |
Use Scenario: Dual-rail power management in GSM handset baseband processor, requiring clean 2.8V I/O and 1.2V core supplies. IC Role / Device Role / Timing Role: Post-regulator for noisy SMPS outputs, providing low-noise 2.8V rail with Bypass capacitor and shutdown-controlled 1.2V auxiliary rail. Use Value: 60dB PSRR at 1kHz suppresses switching noise from primary DC/DC; SHDN pin enables dynamic rail gating during sleep modes. |
| Industrial Data Loggers | Linear Post-Regulator for SMPS |
|
Use Scenario: Battery-backed environmental logger deployed in remote locations, operating continuously at -40°C to +85°C with RTC and flash memory. IC Role / Device Role / Timing Role: Adjustable LDO delivering stable 3.3V to RTC and SRAM during main power loss, enabled via microcontroller GPIO. Use Value: Stable regulation across -40°C to +125°C junction range; 40ppm/°C VOUT drift ensures timekeeping accuracy; NC pins simplify layout. |
Use Scenario: Clean 3.3V supply for FPGA configuration memory and JTAG interface, derived from a 5V buck converter. IC Role / Device Role / Timing Role: Low-noise linear regulator placed downstream of SMPS to eliminate switching artifacts affecting configuration integrity. Use Value: 270mV dropout allows operation with minimal headroom; 1μF minimum output capacitance simplifies BOM and saves board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-3302E/MB | Fixed 3.3V output; 250mA max; 2.0μA quiescent current; SOT-23-5 package | Lacks adjustability and shutdown; smaller footprint but no Bypass pin or ADJ flexibility | Select when fixed 3.3V output suffices and ultra-low IQ (<3μA) is prioritized over noise performance and configurability. |
| TPS7A2025PDQNR | Adjustable output; 300mA; 6.5μA IQ; 165mV dropout at 300mA; WSON-6 package | Lower dropout and IQ, but no Bypass pin; rated only to 125°C ambient (not junction) | Select for newer designs where PCB space is constrained and thermal margin is sufficient; not drop-in due to different pinout and no Bypass function. |
Compared with MCP1703T-3302E/MB and TPS7A2025PDQNR, TC1174VOATR uniquely combines adjustable output, Bypass-enabled ultra-low noise, and robust -40°C to +125°C junction operation in SOIC-8-making it optimal for legacy and industrial designs demanding proven reliability and analog precision.
Availability
TC1174VOATR is available at Aetrix Electronics and suitable for battery-operated systems, portable medical instruments, and GSM/PHS handset power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TC1174VOATR 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 facilities.
The TC1174VOATR belongs to Microchip's legacy CMOS LDO family, engineered for ultra-low-power, low-noise regulation in portable and industrial applications where reliability across extreme temperatures is essential.
FAQ
What is the minimum input voltage required for TC1174VOATR to regulate at 3.3V output?
The TC1174VOATR requires VIN ≥ VOUT + VDROPOUT. At 300mA load, dropout is 270mV (typical), so minimum VIN = 3.3V + 0.27V = 3.57V. Per datasheet Note 6, VIN must also be ≥2.7V-thus 3.57V governs. For lower loads (e.g., 100mA), dropout drops to 80mV, allowing VIN as low as 3.38V while maintaining regulation. TC1174VOATR must never operate below its absolute maximum rating of 2.7V input.
Can TC1174VOATR be used without connecting the Bypass pin?
Yes, the Bypass pin on TC1174VOATR may be left unconnected if output noise is not critical. However, omitting the 470pF capacitor increases output noise from 260nV/√Hz to approximately 500nV/√Hz at 10kHz. For applications like precision ADC references or RF bias, the Bypass capacitor is strongly recommended. TC1174VOATR remains fully functional and stable without it.
What is the purpose of the NC pins on TC1174VOATR, and how should they be handled on the PCB?
Pins 3 and 7 of TC1174VOATR are designated "No Connect" (NC) and are internally unconnected. They must remain electrically floating-neither tied to GND, VIN, nor any other net. PCB layout should avoid copper pours, traces, or solder mask openings under these pins to prevent parasitic coupling or unintended shorts. TC1174VOATR's SOIC-8 footprint accommodates this with standard pad geometry.
How does TC1174VOATR behave during shutdown, and what happens to the output voltage?
When the SHDN pin is driven low (≤15% VIN), TC1174VOATR enters shutdown mode: supply current drops to 0.05μA (typical), internal pass transistor turns off, and VOUT falls to 0V. The device retains no output regulation capability in shutdown. Upon SHDN returning high (≥45% VIN), TC1174VOATR resumes regulation with typical startup time governed by output capacitor charging-no external reset or sequencing is needed. TC1174VOATR supports seamless enable/disable cycling.
Is TC1174VOATR compatible with ceramic output capacitors, and what ESR range is acceptable?
Yes, TC1174VOATR is stable with ceramic output capacitors, provided effective series resistance (ESR) is between 0.1Ω and 5.0Ω. A minimum 1μF X7R or X5R ceramic capacitor meets this requirement and is preferred for size, reliability, and low-temperature performance versus tantalum or aluminum electrolytic. TC1174VOATR does not require added ESR, unlike some older LDOs-so standard 0402 or 0603 ceramics work directly.
TC1174VOATR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 5.95V
- 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-SOIC
TC1174VOATR FAQ
1.How can I place an order for TC1174VOATR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1174VOATR 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 TC1174VOATR reliable?
The price and inventory of TC1174VOATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1174VOATR is usually 5 days.
3.What payment methods are accepted for TC1174VOATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1174VOATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1174VOATR?
TC1174VOATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1174VOATR 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 TC1174VOATR?
For technical support, including TC1174VOATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1174VOATR requirements.
6.How does Aetrix verify that TC1174VOATR is sourced from the original manufacturer or authorized distributors?
All TC1174VOATR 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 TC1174VOATR meets industry standards.
7.What is the process for return or replacement of TC1174VOATR?
All TC1174VOATR units undergo pre-shipment inspection (PSI). If there is an issue with TC1174VOATR, 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 TC1174VOATR part is unused and in its original packaging.
Return procedure for TC1174VOATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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