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Microchip Technology TC1174VUATR
- Part No.:
- TC1174VUATR
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1174VUATR.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,654
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Product details
Overview
TC1174VUATR from Microchip Technology is an adjustable-output CMOS low-dropout (LDO) voltage regulator in an 8-pin MSOP package, delivering up to 300mA output current with typical supply current of 50μA and dropout voltage of 270mV at full load. It features shutdown control, reference bypass input for ultra-low noise (260nV/√Hz), and over-temperature/over-current protection - ideal for battery-powered medical instruments and portable communications devices.
For engineers reviewing the TC1174VUATR datasheet, TC1174VUATR pinout, TC1174VUATR application, or TC1174VUATR equivalent, key selection considerations include its adjustable output range (1.2V to VIN–0.05V), 40ppm/°C temperature coefficient, 60dB PSRR at 1kHz, and compatibility with 1μF minimum output capacitance in space-constrained designs.
Technical Context
The TC1174VUATR uses a CMOS pass element enabling ultra-low quiescent current independent of load - unlike bipolar LDOs - while maintaining regulation from 0mA to 300mA. Its internal feed-forward compensation ensures fast transient response to step-load changes.
It integrates dual protection: thermal shutdown triggers at ~150°C and latches off until die cools to ~140°C; current limiting activates at ~600mA short-circuit output current. The Bypass pin accepts a 470pF capacitor to reduce reference noise, directly lowering output noise spectral density.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 300mA maximum - supports moderate-power analog/digital rails without external boost circuitry. |
| Dropout Voltage | 270mV at 300mA - enables regulation from 2.7V input down to ≥2.43V output, critical for single-cell Li-ion or alkaline systems. |
| Supply Current | 50μA typical at full load - 20–60× lower than bipolar regulators, extending battery life in always-on monitoring applications. |
| Reference Voltage | 1.20V ±0.035V - sets precision of adjustable output via external resistor divider (VOUT = 1.2 × [R1/R2 + 1]). |
| Output Noise | 260nV/√Hz at 10kHz with 470pF on Bypass - meets low-noise requirements for ADC references or RF bias rails. |
| PSRR | 60dB at 1kHz - suppresses switching noise from upstream SMPS when used as linear post-regulator. |
| Temp Coefficient | 40ppm/°C - ensures ≤±0.5% VOUT drift across –40°C to +125°C junction range for industrial-grade stability. |
Pinout & Package
TC1174VUATR is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 1.1mm height), optimized for high-density PCB layouts and thermal performance (θJA ≈ 200°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 8) | Unregulated input supply | Accepts 2.7–6.0V; must be ≥ VOUT + dropout and ≥2.7V for full 300mA operation. |
| VOUT (Pin 2) | Regulated output | Delivers adjustable voltage; requires ≥1μF ceramic or tantalum capacitor to ground for stability. |
| GND (Pin 3) | Ground reference | Common return for input, output, and feedback paths; layout with low-impedance plane minimizes noise coupling. |
| ADJ (Pin 4) | Feedback adjust node | Connects to resistor divider; 50pA leakage enables high-value resistors (e.g., 470kΩ) to minimize bleeder current. |
| BYPASS (Pin 5) | Reference bypass input | 470pF capacitor to GND reduces internal reference noise, cutting output noise by >50% at 10kHz. |
| SHDN (Pin 6) | Logic-controlled enable | VIH ≥ 45% VIN enables regulator; VIL ≤ 15% VIN disables it, reducing supply current to 0.05μA. |
| NC (Pins 1, 7) | No-connect terminals | Not internally bonded; must remain unconnected per datasheet to avoid parasitic coupling or latch-up risk. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Range | 1.2V to (VIN – 0.05V) - supports custom rail voltages (e.g., 1.8V, 2.5V, 3.3V) using two external resistors. |
| Ultra-Low Dropout | 270mV at 300mA - sustains regulation under brown-out conditions where input sags near output level. |
| Shutdown Mode | 0.05μA typical supply current - enables true zero-power state during system sleep, critical for multi-year battery life. |
| Internal Protection | Thermal shutdown + current limit - eliminates need for external fault-handling circuitry in compact portable designs. |
| Capacitor Stability | Stable with ≥1μF output capacitor - avoids costly low-ESR ceramics required by many competing LDOs. |
Applications
| Medical Vital Sign Monitor | Portable GSM Phone Baseband |
|---|---|
Use Scenario: Continuous ECG signal conditioning with 16-bit ADC requiring clean 2.5V reference rail. IC Role / Device Role / Timing Role: Low-noise post-regulator supplying ADC reference and analog front-end, enabled only during measurement cycles. Use Value: 260nV/√Hz output noise and 40ppm/°C drift ensure <0.01% gain error across operating temperature, meeting IEC 60601 accuracy requirements. | Use Scenario: Powering baseband processor core and memory in slim-form-factor GSM handset. IC Role / Device Role / Timing Role: Adjustable LDO generating 1.8V core voltage from 3.6V Li-ion battery, dynamically enabled/disabled by PMIC control logic. Use Value: 50μA quiescent current extends standby time; 270mV dropout preserves usable battery range down to 2.0V cell voltage. |
| Handheld Diagnostic Instrument | Industrial Data Logger |
Use Scenario: Battery-powered ultrasound probe with analog beamformer IC needing stable 3.3V supply. IC Role / Device Role / Timing Role: Primary power rail regulator with Bypass pin filtered to meet <10μV RMS noise spec for analog signal chain. Use Value: 470pF Bypass capacitor reduces integrated output noise to <5μV RMS (10Hz–100kHz), preventing artifact injection into echo signals. | Use Scenario: Remote environmental sensor node logging temperature/humidity every 10 minutes using coin-cell battery. IC Role / Device Role / Timing Role: Always-on 3.0V regulator for RTC and microcontroller, entering shutdown between sampling intervals. Use Value: 0.05μA shutdown current limits annual battery drain to <0.45mAh, enabling >5-year operation on CR2032. |
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; 2μA quiescent current; no SHDN or Bypass pins. | Suitable only for fixed-voltage use cases; lacks programmability and ultra-low-noise capability. | Select when output voltage is invariant and lowest possible IQ dominates design priority. |
| TPS7A1633DRBR | 300mA adjustable LDO; 17μA IQ; 300mV dropout; integrated soft-start; no Bypass pin. | Higher PSRR (70dB @ 1kHz) but no dedicated noise-reduction path; requires larger output cap (2.2μF). | Prefer when system-level ripple rejection is paramount and board space allows extra capacitance. |
Compared with MCP1703T-3302E/MB and TPS7A1633DRBR, TC1174VUATR uniquely combines adjustable output, ultra-low-noise Bypass functionality, and industry-leading 50μA operating current - making it optimal for battery-critical, noise-sensitive, and voltage-flexible applications where MSOP footprint is acceptable.
Availability
TC1174VUATR is available at Aetrix Electronics and suitable for battery-operated medical instruments, portable GSM/PHS phones, and linear post-regulators for SMPS requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for TC1174VUATR 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 TC1174VUATR belongs to Microchip's legacy CMOS LDO family designed specifically for ultra-low-power, low-noise portable electronics - emphasizing minimal quiescent current, adjustable output flexibility, and robust protection in miniature packages.
FAQ
What is the minimum input voltage required for TC1174VUATR to deliver 300mA output current?
The TC1174VUATR requires VIN ≥ VOUT + dropout voltage and VIN ≥ 2.7V. At 300mA, dropout is 270mV (typical), so for a 3.3V output, minimum VIN is 3.57V. If VOUT is set to 2.5V, minimum VIN is 2.7V - the absolute lower bound specified in the datasheet for full-load operation.
Can TC1174VUATR be used without connecting the Bypass pin?
Yes, TC1174VUATR operates fully functional without the Bypass pin connection. The 470pF capacitor on the Bypass pin is optional and only required when ultra-low output noise (e.g., <5μV RMS) is needed for sensitive analog circuits. Leaving it unconnected results in higher baseline noise (260nV/√Hz becomes ~400nV/√Hz), but all regulation and protection functions remain active.
What is the maximum allowable output voltage setting for TC1174VUATR?
The maximum output voltage for TC1174VUATR is (VIN – 0.05V), as stated in the datasheet. With VIN = 6.0V maximum, VOUT can be set up to 5.95V. However, practical limits arise from power dissipation: at 300mA, PD = (VIN – VOUT) × 0.3A. For safe operation in the MSOP package (θJA ≈ 200°C/W), VOUT should stay ≥ VIN – 1.17V at TA = 55°C to avoid thermal shutdown.
Does TC1174VUATR require a minimum load current to maintain regulation?
No, TC1174VUATR does not require a minimum load current. It maintains regulation from 0mA to 300mA across the full temperature range (–40°C to +125°C), a key advantage of its CMOS architecture over older bipolar LDOs. This makes TC1174VUATR suitable for RTC backup, memory retention, and other zero-load standby applications.
How does the SHDN pin behavior affect output voltage during disable?
When the SHDN pin is driven low (≤15% VIN), TC1174VUATR enters shutdown mode: output voltage falls to 0V, supply current drops to 0.05μA (typical), and internal pass transistor turns off completely. Unlike some LDOs that float or leak, TC1174VUATR actively discharges VOUT through an internal path, ensuring rapid and reliable rail collapse for system-level power sequencing.
TC1174VUATR 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:
- 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-MSOP
TC1174VUATR FAQ
1.How can I place an order for TC1174VUATR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1174VUATR 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 TC1174VUATR reliable?
The price and inventory of TC1174VUATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1174VUATR is usually 5 days.
3.What payment methods are accepted for TC1174VUATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1174VUATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1174VUATR?
TC1174VUATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1174VUATR 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 TC1174VUATR?
For technical support, including TC1174VUATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1174VUATR requirements.
6.How does Aetrix verify that TC1174VUATR is sourced from the original manufacturer or authorized distributors?
All TC1174VUATR 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 TC1174VUATR meets industry standards.
7.What is the process for return or replacement of TC1174VUATR?
All TC1174VUATR units undergo pre-shipment inspection (PSI). If there is an issue with TC1174VUATR, 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 TC1174VUATR part is unused and in its original packaging.
Return procedure for TC1174VUATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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