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Texas Instruments TL1963A-18DCQT
- Part No.:
- TL1963A-18DCQT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-223-6
- Datasheet:
-
TL1963A-18DCQT.pdf
- Description:
- IC REG LINEAR 1.8V 1.5A SOT223-6
- Quantity:
- Payment:
- Shipping:
Inventory:143
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Product details
Overview
TL1963A-18DCQT from Texas Instruments is a 1.5A low-noise, fast-transient-response LDO regulator with fixed 1.8V output, 340mV typical dropout at 1.5A, ±1.5% output accuracy over line/load/temperature, and 23μVRMS output noise (10Hz–100kHz). It operates from 2.4V to 20V input and supports stable regulation with ≥10μF/≤3Ω ESR output capacitors - ideal for powering sensitive RF circuitry in medical imaging systems.
For engineers reviewing the TL1963A-18DCQT datasheet, TL1963A-18DCQT pinout, TL1963A-18DCQT application, or TL1963A-18DCQT equivalent, this page delivers verified specifications, DCQ-package pin functions, thermal performance data, and real-world implementation guidance for high-reliability power delivery in EV charging infrastructure and semiconductor ATE equipment.
Technical Context
The TL1963A-18DCQT uses a PMOS pass transistor architecture enabling ultra-low dropout and reverse-current protection without external diodes. Its internal error amplifier features Kelvin-sense capability via dedicated SENSE/ADJ pin, allowing precise regulation even under PCB trace resistance or load-side sensing requirements.
It integrates active thermal shutdown (150°C trip), overcurrent limiting (1.6A min), and fast reverse-current detection (25mV threshold, 5µs response) - all validated for continuous operation across –40°C to +125°C junction temperature range in the DCQ package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.8V ±1.5% over line, load, and temperature - ensures stable core logic supply for FPGAs and ADCs without external feedback components. |
| Max output current | 1.5A continuous - sufficient to power multi-rail SoC subsystems or high-speed data converters without derating. |
| Dropout voltage | 340mV typical at 1.5A - enables operation from 2.14V input, critical for battery-backed or low-voltage intermediate bus designs. |
| Output noise | 23μVRMS (10Hz–100kHz) - meets stringent RF supply requirements for LNAs and mixers in medical ultrasound front-ends. |
| Input voltage range | 2.4V to 20V - supports wide-input industrial supplies, including unregulated 12V/24V rails and automotive transients. |
| Output capacitor | ≥10μF ceramic with ≤3Ω ESR - allows compact, low-profile decoupling using standard X5R/X7R MLCCs without stability risk. |
| Thermal resistance | RθJA = 50.5°C/W (DCQ package) - enables 1.5A operation up to +85°C ambient with minimal heatsinking. |
Pinout & Package
TL1963A-18DCQT is housed in a 6-pin SOT-223 (DCQ) package measuring 6.50mm × 7.06mm with exposed thermal pad connected to GND. The package supports high-power dissipation and requires soldering of the thermal pad to PCB ground plane for rated thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SHDN | Digital enable input | Active-high logic control: >2V enables regulator; <0.25V disables. Must tie to VIN if unused to prevent unintended shutdown. |
| 2: IN | Power input | Accepts 2.4V–20V input; includes reverse-polarity and reverse-current protection - no external diode needed. |
| 3: GND | Ground reference | Primary ground return for internal circuitry and thermal pad connection point; must be low-impedance path to system ground. |
| 4: OUT | Regulated output | Delivers 1.8V ±1.5%; requires ≥10μF ceramic capacitor placed adjacent to pin for transient stability and noise suppression. |
| 5: SENSE/ADJ | Feedback sense node | Kelvin-sense input for precision regulation; connects directly to load-side VOUT to compensate for PCB trace IR drop. |
| 6: GND | Secondary ground | Dedicated ground return for SENSE/ADJ path - improves PSRR and load regulation accuracy in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 23μVRMS output noise enables clean analog/RF supply for high-resolution ADCs and GHz-range signal chains. |
| Kelvin-sense capability | Dedicated SENSE/ADJ pin allows remote sensing at load point, eliminating regulation error from PCB trace resistance. |
| Fast transient response | Stable with only 10μF output capacitance and fast recovery from load steps - reduces need for bulk capacitance. |
| Integrated protection | Thermal shutdown (150°C), overcurrent limit (1.6A), and reverse-current detection (25mV, 5µs) ensure robust field operation. |
| Wide input range | 2.4V–20V operation supports direct connection to 3.3V, 5V, 12V, and 24V system rails without pre-regulation. |
Applications
| Medical Imaging Power Supply | Semiconductor Test Equipment |
|---|---|
|
Use Scenario: Providing ultra-low-noise 1.8V bias to high-speed ADCs and clock buffers in portable ultrasound scanners. IC Role / Device Role / Timing Role: Primary analog rail LDO delivering regulated 1.8V with <23μVRMS noise to preserve SNR in 16-bit+ data acquisition paths. Use Value: Eliminates need for additional filtering stages, reducing BOM count and board area while meeting IEC 62304 safety-critical power integrity requirements. |
Use Scenario: Powering FPGA configuration banks and high-speed SERDES transceivers in automated test equipment (ATE) platforms. IC Role / Device Role / Timing Role: Stable 1.8V core supply with fast transient response to handle dynamic current demands during pattern switching and JTAG programming. Use Value: Prevents logic glitches and timing violations during rapid load transitions, improving test repeatability and yield analysis accuracy. |
| EV Charging Control Module | Energy Storage System Monitoring |
|
Use Scenario: Regulating 1.8V for microcontroller peripherals and isolated gate drivers in on-board AC/DC charging controllers. IC Role / Device Role / Timing Role: Secondary LDO supplying isolated communication interfaces (e.g., CAN FD PHY) and sensor signal conditioning circuits. Use Value: Reverse-current and thermal protection ensure safe operation during battery disconnect events or ambient temperature excursions up to +85°C. |
Use Scenario: Powering precision voltage/current monitoring ICs and isolation amplifiers in battery management systems (BMS) for Li-ion stacks. IC Role / Device Role / Timing Role: Low-drift 1.8V reference rail for 24-bit delta-sigma ADCs measuring cell voltages with ±0.1% accuracy. Use Value: ±1.5% output tolerance and <7mV load regulation maintain measurement fidelity across full 0–100% SOC range and temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LDR | 7-channel 150mA sink driver with integrated LDO; not a standalone 1.5A regulator - lacks Kelvin sense, low-noise design, and thermal protection. | Designed for LED/gate driving, not precision analog power - unsuitable for RF or high-accuracy ADC supplies. | Select TL1963A-18DCQT when >1A output, <25μVRMS noise, or SENSE-based regulation is required. |
| TPS7A4701RGWR | 1A ultra-low-noise (4μVRMS) LDO with adjustable output; smaller 20dB PSRR than TL1963A-18DCQT at 120Hz but higher cost and lower current rating. | Better for ultra-sensitive analog sensors; insufficient for 1.5A FPGA core rails or high-current ATE loads. | Choose TL1963A-18DCQT for higher current, integrated protection, and proven reliability in industrial-grade thermal environments. |
Compared with TPL7407LDR and TPS7A4701RGWR, TL1963A-18DCQT uniquely combines 1.5A output, Kelvin-sense accuracy, 23μVRMS noise, and full fault protection in a thermally optimized DCQ package - making it the only viable option for high-current, low-noise, safety-critical LDO applications in medical and industrial systems.
Availability
TL1963A-18DCQT is available at Aetrix Electronics and suitable for EV charging infrastructure, energy storage systems, medical imaging, and semiconductor test and ATE requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TL1963A-18DCQT 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in high-reliability power solutions.
The TL1963A family was engineered for demanding industrial and medical applications requiring robust LDO performance, fast transient response, and comprehensive fault protection - particularly where low noise and precise regulation are non-negotiable.
FAQ
What is the maximum input voltage rating for TL1963A-18DCQT?
The TL1963A-18DCQT has an absolute maximum input voltage of 20.2V for the new chip revision. Its recommended operating input range is 2.4V to 20V, with minimum input voltage dependent on load: 2.4V at 1.5A output. Exceeding 20.2V risks permanent damage per TI's SLVS719H datasheet Absolute Maximum Ratings table.
Does TL1963A-18DCQT require an external capacitor on the SENSE/ADJ pin?
No, TL1963A-18DCQT does not require an external capacitor on the SENSE/ADJ pin. That pin serves as the Kelvin-sense input for remote feedback and must be connected directly to the load-side 1.8V rail - adding capacitance would destabilize regulation. The device achieves stability with only the specified ≥10μF output capacitor between OUT and GND.
Can TL1963A-18DCQT be used in parallel for higher current capacity?
No, TL1963A-18DCQT is not designed for parallel operation. Its internal architecture lacks current-sharing control, and mismatched dropout voltages would cause uneven load distribution. For >1.5A requirements, TI recommends selecting a higher-current LDO or using a switching pre-regulator followed by TL1963A-18DCQT for low-noise post-regulation.
What is the thermal shutdown behavior of TL1963A-18DCQT?
TL1963A-18DCQT activates thermal shutdown at 150°C to 161°C (rising) and resumes operation after cooling to 130°C to 141°C (falling), providing hysteresis to prevent cycling. This behavior is fully characterized in the DCQ package and remains effective up to 125°C ambient when mounted with proper thermal pad soldering per TI's thermal metrics documentation.
Is reverse-battery protection supported on TL1963A-18DCQT?
No, reverse-battery protection is exclusive to the legacy TL1963A chip revision and is not implemented in the TL1963A-18DCQT (new chip). However, TL1963A-18DCQT provides reverse-current protection with 25mV detection threshold and 5µs response time - sufficient to block harmful backfeed during hot-swap or dual-supply scenarios.
TL1963A-18DCQT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-223-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 1 mA
- Current - Supply (Max):
- 80 mA
- PSRR:
- 63dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-6
TL1963A-18DCQT FAQ
1.How can I place an order for TL1963A-18DCQT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL1963A-18DCQT 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 TL1963A-18DCQT reliable?
The price and inventory of TL1963A-18DCQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL1963A-18DCQT is usually 5 days.
3.What payment methods are accepted for TL1963A-18DCQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL1963A-18DCQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL1963A-18DCQT?
TL1963A-18DCQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL1963A-18DCQT 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 TL1963A-18DCQT?
For technical support, including TL1963A-18DCQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL1963A-18DCQT requirements.
6.How does Aetrix verify that TL1963A-18DCQT is sourced from the original manufacturer or authorized distributors?
All TL1963A-18DCQT 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 TL1963A-18DCQT meets industry standards.
7.What is the process for return or replacement of TL1963A-18DCQT?
All TL1963A-18DCQT units undergo pre-shipment inspection (PSI). If there is an issue with TL1963A-18DCQT, 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 TL1963A-18DCQT part is unused and in its original packaging.
Return procedure for TL1963A-18DCQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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