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Microchip Technology TC1174VOA
- Part No.:
- TC1174VOA
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TC1174VOA.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,249
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Product details
Overview
TC1174VOA from Microchip Technology is an adjustable-output CMOS low-dropout linear regulator in 8-pin SOIC package, delivering up to 300mA output current with typical 50μA supply current, 270mV dropout at full load, and integrated over-temperature/over-current protection-designed for battery-powered medical instruments and portable computing systems.
For engineers reviewing the TC1174VOA datasheet, TC1174VOA pinout, TC1174VOA application, or TC1174VOA equivalent, key selection criteria include its ultra-low-noise operation (260nV/√Hz), shutdown current of 0.05μA, adjustable output voltage range (1.20V reference ±35mV), Bypass input for noise reduction, and stability with only 1μF output capacitance.
Technical Context
The TC1174VOA employs a CMOS pass element enabling supply current independent of load-unlike bipolar LDOs-ensuring stable regulation from 0 to 300mA while maintaining 50μA quiescent current. Its internal feed-forward compensation delivers fast transient response to load steps.
It integrates dual protection: thermal shutdown activates at 150°C junction temperature with hysteresis (re-enable at ~140°C), and current limiting caps output short-circuit current at 550–650mA. The ADJ pin accepts leakage-limited resistor dividers (470kΩ–3MΩ) to set VOUT = VREF × (R1/R2 + 1), where VREF = 1.20V ±35mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 300mA max-supports power rails for microcontrollers and analog sensors without external boost. |
| Dropout Voltage | 270mV typ. at 300mA-enables regulation from 2.7V input down to ≥2.43V output. |
| Supply Current | 50μA typ. at full load-20–60× lower than bipolar LDOs, extending battery life in always-on devices. |
| Shutdown Current | 0.05μA typ.-reduces system standby power to nanoampere level when disabled. |
| Reference Voltage | 1.20V ±35mV-sets precise output voltage via external resistor divider on ADJ pin. |
| Output Noise | 260nV/√Hz at 10kHz with 470pF Bypass capacitor-critical for RF, ADC, and precision analog circuits. |
| Line Regulation | 0.05% typ.-minimizes output drift across input voltage changes (2.7–6.0V). |
| Thermal Coefficient | 40ppm/°C-ensures <±1.2mV output drift over –40°C to +125°C operating range. |
Pinout & Package
TC1174VOA uses an 8-pin SOIC (Small Outline Integrated Circuit) package with standard 1.27mm pitch, 5.00mm × 3.99mm body size, and exposed pad not present. Pin 1 is marked by notch or dot; leads are gull-wing, lead-free compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Regulated output terminal | Delivers stable adjustable voltage; requires ≥1μF ceramic or tantalum capacitor to GND for stability. |
| 2 (GND) | Ground reference | Common return path for all internal circuitry and external feedback network; must be low-impedance. |
| 3 (NC) | No-connect terminal | Internally unconnected; must remain floating-no PCB trace or soldering allowed. |
| 4 (ADJ) | Feedback adjust input | High-impedance node (50pA leakage) accepting resistor divider to set output voltage per VOUT = VREF × (R1/R2 + 1). |
| 5 (Bypass) | Reference bypass input | Connects 470pF capacitor to GND to reduce internal reference noise and cut output noise to 260nV/√Hz. |
| 6 (SHDN) | Active-high enable control | Logic high (>45% VIN) enables regulator; logic low (<15% VIN) disables output and reduces supply current to 0.05μA. |
| 7 (NC) | No-connect terminal | Internally unconnected; must remain floating-no PCB trace or soldering allowed. |
| 8 (VIN) | Unregulated input supply | Accepts 2.7–6.0V input; requires local 1μF decoupling if >10" wire length or battery source. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50μA at full 300mA load-enables multi-year battery operation in portable instrumentation. |
| Bypass-enabled ultra-low noise | 260nV/√Hz output noise with 470pF on Bypass pin-meets stringent requirements for precision ADCs and RF receivers. |
| Fast transient response | Internal feed-forward compensation minimizes output voltage sag during rapid load steps (e.g., MCU wake-up bursts). |
| Wide input voltage range | 2.7V to 6.0V operation-supports single-cell Li-ion, dual-cell alkaline, and post-regulation from SMPS outputs. |
| Robust protection suite | Integrated over-temperature shutdown (150°C trip) and current limiting (550–650mA) prevent damage under fault conditions. |
| Minimal external components | Stable with only 1μF output capacitor-reduces BOM count and board space vs. competitors requiring ≥10μF. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor with low-power MCU and analog front-end operating from coin-cell battery. IC Role / Device Role / Timing Role: Primary voltage regulator supplying 3.3V to MCU and 2.5V to precision ADC via resistor divider on ADJ pin. Use Value: 50μA quiescent current extends battery life to >2 years; 260nV/√Hz noise ensures <12-bit ENOB in ADC measurements. | Use Scenario: Environmental sensor node logging temperature/humidity every 5 minutes using intermittent wake-up. IC Role / Device Role / Timing Role: Adjustable LDO providing 1.8V to ultra-low-power microcontroller and 3.0V to RF transceiver during active transmission. Use Value: SHDN pin enables full system shutdown between samples, reducing average current to <1μA; 0.05μA shutdown current dominates sleep budget. |
| Linear Post-Regulator for SMPS | GSM/PHS Handset Power Management |
Use Scenario: Clean 2.8V rail for RF amplifier stage downstream of noisy 3.3V buck converter. IC Role / Device Role / Timing Role: Low-noise LDO filtering switching ripple and harmonics from upstream SMPS output. Use Value: 60dB PSRR at 1kHz and 470pF Bypass input suppress >99% of 100kHz–1MHz SMPS ripple, preventing RF desense. | Use Scenario: Dual-voltage power management in legacy GSM handset with separate core and I/O rail requirements. IC Role / Device Role / Timing Role: Single TC1174VOA configured for 2.8V core supply and 3.0V I/O supply via dynamic ADJ reconfiguration. Use Value: Adjustable output eliminates need for multiple fixed-LDO SKUs; 300mA rating supports peak transmit current without dropout. |
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; no Bypass pin or ADJ capability. | Suitable only for fixed-voltage use cases; cannot replace TC1174VOA's adjustable output or ultra-low-noise Bypass function. | Select when fixed 3.3V output suffices and nanoamp quiescent current is prioritized over adjustability. |
| TPS7A1633DRBR | Adjustable output (1.2–5.5V); 150mA max; 17μA quiescent current; no Bypass pin; 300mV dropout at 100mA. | Limited output current prevents use in 300mA loads; lacks Bypass input for noise-sensitive analog/RF stages. | Choose for lower-quiescent designs where 150mA is sufficient and noise performance is secondary. |
Compared with MCP1703T-3302E/MB and TPS7A1633DRBR, TC1174VOA uniquely combines 300mA output, adjustable voltage, 50μA quiescent current, and Bypass-enabled 260nV/√Hz noise-making it irreplaceable in high-precision, battery-constrained, multi-rail systems.
Availability
TC1174VOA is available at Aetrix Electronics and suitable for battery-operated medical instruments, portable data loggers, and GSM/PHS handset power management requiring stable component supply across extended production lifecycles.
Supply support for TC1174VOA 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 TC1174VOA belongs to Microchip's CMOS LDO regulator product line, engineered specifically for ultra-low-power, low-noise, and wide-input-voltage applications in portable and medical electronics.
FAQ
What is the minimum input voltage required for TC1174VOA to regulate at 3.3V output?
The TC1174VOA requires VIN ≥ VOUT + VDROPOUT. At 3.3V output and 300mA load, dropout is 270mV (typical), so minimum VIN = 3.57V. However, the absolute minimum specified VIN is 2.7V-so 3.3V output is only achievable when VIN ≥ 3.57V. For lower VIN, output must be reduced accordingly per the dropout specification.
Can TC1174VOA be used without connecting the Bypass pin?
Yes, TC1174VOA operates fully functional without the Bypass pin connection. Leaving Bypass unconnected results in higher output noise (not quantified in datasheet but implied to be significantly above 260nV/√Hz). The 470pF capacitor is optional and only required when ultra-low-noise performance is critical-for example, powering precision ADCs or RF synthesizers.
What is the maximum output voltage achievable with TC1174VOA?
The TC1174VOA supports output voltages from VREF (1.20V ±35mV) up to (VIN – 0.05V). With maximum VIN = 6.0V, the theoretical maximum VOUT is 5.95V. However, practical limits depend on resistor divider stability, ADJ pin leakage (50pA), and thermal constraints-most designs target ≤5.0V to maintain margin for dropout and thermal rise.
Does TC1174VOA require an input capacitor, and if so, what value?
TC1174VOA does not mandate an input capacitor for stability, but one is recommended: a 1μF capacitor from VIN to GND is required if the regulator is more than 10 inches from the AC filter capacitor or powered directly from a battery. This improves transient response and reduces input ripple coupling-especially important in battery-powered systems where source impedance rises with discharge.
How does TC1174VOA behave during thermal shutdown?
When TC1174VOA junction temperature exceeds 150°C, its internal thermal protection circuit disables the pass element, dropping VOUT to zero and halting power delivery. The device remains latched off until die temperature falls to approximately 140°C, at which point regulation resumes automatically-no external reset or power cycle is needed. This hysteresis prevents oscillation near the trip point.
TC1174VOA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
TC1174VOA FAQ
1.How can I place an order for TC1174VOA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1174VOA 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 TC1174VOA reliable?
The price and inventory of TC1174VOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1174VOA is usually 5 days.
3.What payment methods are accepted for TC1174VOA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1174VOA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1174VOA?
TC1174VOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1174VOA 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 TC1174VOA?
For technical support, including TC1174VOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1174VOA requirements.
6.How does Aetrix verify that TC1174VOA is sourced from the original manufacturer or authorized distributors?
All TC1174VOA 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 TC1174VOA meets industry standards.
7.What is the process for return or replacement of TC1174VOA?
All TC1174VOA units undergo pre-shipment inspection (PSI). If there is an issue with TC1174VOA, 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 TC1174VOA part is unused and in its original packaging.
Return procedure for TC1174VOA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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