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Texas Instruments TL1963A-18DCQR
- Part No.:
- TL1963A-18DCQR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-223-6
- Datasheet:
-
TL1963A-18DCQR.pdf
- Description:
- IC REG LINEAR 1.8V 1.5A SOT223-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,088
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Product details
Overview
TL1963A-18DCQR 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 (DCQ/KTT packages), and 23μVRMS output noise (10Hz–100kHz). It serves as a precision power rail for RF-sensitive circuits in EV charging infrastructure and medical imaging systems.
For engineers reviewing the TL1963A-18DCQR datasheet, TL1963A-18DCQR pinout, TL1963A-18DCQR application, or TL1963A-18DCQR equivalent, this page delivers verified package mapping (6-pin SOT-223), thermal performance data (RθJA = 50.5°C/W), reverse-current and thermal shutdown protection, and design-critical ESR tolerance (≤3Ω) for stable operation with ≥10μF output capacitance.
Technical Context
The TL1963A-18DCQR implements a PMOS pass transistor architecture enabling ultra-low dropout and fast transient response. Its internal error amplifier uses Kelvin-sense feedback via the SENSE/ADJ pin to maintain regulation accuracy under dynamic load steps up to 1.5A.
It integrates reverse-current protection that blocks current flow from OUT to IN when VIN falls below VOUT, plus thermal shutdown (150°C trip) and overcurrent limiting (1.6A min). The device operates across –40°C to +150°C junction temperature and supports input voltages from 2.4V to 20V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.8V ±1.5% over line, load, and temperature - ensures stable core voltage for low-power microcontrollers and ADCs. |
| Max output current | 1.5A continuous - powers high-current analog front-ends or FPGA I/O banks without external boost stages. |
| Dropout voltage | 340mV typical at 1.5A - enables operation from 2.14V input while maintaining 1.8V output, critical for battery-backed systems. |
| Output noise | 23μVRMS (10Hz–100kHz) - meets stringent RF supply requirements in medical imaging and ATE test equipment. |
| Input voltage range | 2.4V to 20V - accommodates wide-input industrial supplies and unregulated DC bus rails in EV charging stations. |
| Output capacitor | ≥10μF with ESR ≤3Ω - allows use of low-ESR ceramic capacitors without stability risk, simplifying layout. |
| Protection features | Reverse-current, thermal shutdown (150°C), and overcurrent - ensures robust operation in harsh environments without external circuitry. |
Pinout & Package
TL1963A-18DCQR is housed in a 6-pin SOT-223 (DCQ) package measuring 6.50mm × 7.06mm, with exposed thermal pad connected to GND for optimal heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SHDN | Digital enable input | Active-high logic control; must be tied to VIN if unused - enables system-level power sequencing and standby mode. |
| 2: IN | Main power input | Accepts 2.4V–20V input; reverse-polarity protected only in legacy chip - not applicable to TL1963A-18DCQR (new chip). |
| 3: GND | Power ground | Primary return path for input/output currents; connects to exposed thermal pad - requires solid PCB copper pour for thermal management. |
| 4: OUT | Regulated output | Delivers 1.8V ±1.5%; requires ≥10μF ceramic capacitor placed adjacent to pin - minimizes loop inductance for fast transient response. |
| 5: SENSE/ADJ | Kelvin sense / feedback node | Monitors regulated output directly; enables accurate remote sensing - eliminates IR drop errors in high-current PCB traces. |
| 6: GND | Second ground terminal | Separate low-impedance return for feedback path - improves PSRR and load regulation by isolating sense current from power ground noise. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 23μVRMS output noise enables clean power for RF transceivers and high-resolution ADCs without additional filtering. |
| Fast transient response | Stable with ≥10μF ceramic output capacitor and ≤3Ω ESR - recovers within microseconds from 1A load steps. |
| Precision output accuracy | ±1.5% over full operating range (–40°C to +150°C, 0–1.5A load, 2.4–20V input) - reduces need for post-regulation trimming. |
| Integrated reverse-current protection | Blocks backflow from OUT to IN when VIN drops below VOUT - prevents damage in multi-rail systems during power-down sequences. |
| Thermal shutdown with hysteresis | Trips at 150°C (rising), resets at 130°C (falling) - provides safe thermal margin for continuous 1.5A operation in enclosed enclosures. |
Applications
| EV Charging Infrastructure | Medical Imaging Systems |
|---|---|
|
Use Scenario: Powering isolated gate drivers and communication interfaces in 150kW+ DC fast chargers where input rails vary from 200V–1000V DC after rectification. IC Role / Device Role / Timing Role: Primary 1.8V LDO for digital control logic and CAN transceivers, fed from intermediate 5V/3.3V rails. Use Value: 340mV dropout enables reliable 1.8V generation even during brownout conditions on upstream converters; ±1.5% accuracy ensures consistent timing in real-time control loops. |
Use Scenario: Supplying low-noise bias to ultrasound beamforming ASICs and MRI gradient amplifier control circuitry. IC Role / Device Role / Timing Role: Clean 1.8V rail for high-speed ADC clock buffers and FPGA configuration memory. Use Value: 23μVRMS noise floor prevents spurious tones in image reconstruction; fast transient response maintains SNR during rapid scan-mode transitions. |
| Energy Storage Systems | Semiconductor Test Equipment (ATE) |
|
Use Scenario: Regulating auxiliary power for BMS microcontrollers and cell monitoring ICs in 48V–800V battery packs with wide ambient temperature swings. IC Role / Device Role / Timing Role: Fixed-output LDO delivering 1.8V to safety-critical MCU cores and isolated SPI interfaces. Use Value: –40°C to +150°C operating range supports under-hood and module-integrated deployment; reverse-current protection prevents leakage into failed cells. |
Use Scenario: Providing stable 1.8V to high-speed digital pattern generators and parametric measurement units requiring sub-mV ripple. IC Role / Device Role / Timing Role: Precision voltage source for reference DACs and comparator bias networks in automated test heads. Use Value: ±1.5% accuracy eliminates calibration drift across temperature; 10Hz–100kHz noise spec matches ATE spectral purity requirements. |
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 500mA NMOS LDO array; 1.8V fixed output; 250mV dropout at 500mA; no reverse-current protection. | Targeted at multi-rail logic level shifting, not single-rail high-current analog supply. | Select when consolidating multiple low-current rails; avoid for >1A loads or reverse-current-critical systems. |
| TPS7A4701RGWR | 1A ultra-low-noise (4μVRMS) LDO; adjustable/fixed 1.8V; 300mV dropout at 1A; includes EN/PG pins. | Optimized for ultra-sensitive analog signal chains (e.g., precision instrumentation), not high-current digital loads. | Choose for lower noise where 1A suffices; TL1963A-18DCQR preferred when 1.5A and integrated reverse-current protection are mandatory. |
Compared with TPL7407LDR and TPS7A4701RGWR, TL1963A-18DCQR uniquely combines 1.5A capability, ±1.5% accuracy, reverse-current blocking, and 23μVRMS noise - making it the only option among the three qualified for high-current, safety-aware, RF-clean applications like EV charger control modules.
Availability
TL1963A-18DCQR is available at Aetrix Electronics and suitable for EV charging infrastructure, medical imaging systems, and semiconductor test equipment requiring stable component supply with guaranteed long-term sourcing and traceable manufacturing.
Supply support for TL1963A-18DCQR 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 and embedded processing technologies, with decades of expertise in power management IC design and automotive-grade reliability validation.
The TL1963A product line targets high-reliability industrial and transportation applications demanding robust LDO performance under wide temperature, load, and input-voltage variation - especially where reverse-current blocking and low noise are non-negotiable.
FAQ
What is the maximum input voltage rating for TL1963A-18DCQR?
The TL1963A-18DCQR has an absolute maximum input voltage of 20.2V for the new-chip version. Operation above this level risks permanent damage. Recommended operating input range is 2.4V to 20V, with minimum input determined by load current and dropout - e.g., ≥2.14V required for 1.5A output at 1.8V.
Does TL1963A-18DCQR include reverse-battery protection?
No. Reverse-battery protection is exclusive to the legacy TL1963A chip variant. TL1963A-18DCQR is a new-chip version and does not implement reverse-polarity input protection. It does include reverse-current protection (blocking OUT-to-IN current), but external diode protection is required if VIN may be applied with reversed polarity.
What output capacitor value and type are required for stable operation of TL1963A-18DCQR?
TL1963A-18DCQR requires a minimum 10μF ceramic output capacitor with ESR ≤3Ω. X5R or X7R dielectrics are recommended for stable capacitance over temperature and bias. Larger values (e.g., 22μF) improve transient response, but ESR must remain within specification to avoid oscillation.
How does the SENSE/ADJ pin function on TL1963A-18DCQR?
On TL1963A-18DCQR, the SENSE/ADJ pin serves as the Kelvin sense input for the error amplifier. It must be connected directly to the regulated output (or to the load-side of the output capacitor) to enable accurate remote voltage sensing - compensating for PCB trace resistance and improving load regulation by up to 90% compared to local sensing.
What thermal performance can be expected from TL1963A-18DCQR in a standard 2-layer PCB layout?
In a standard 2-layer PCB with 1-in² 2oz copper pour connected to the exposed thermal pad, TL1963A-18DCQR achieves RθJA ≈ 50.5°C/W (per datasheet). At 1.5A load and 20°C ambient, junction temperature rises ~76°C - staying well below the 150°C shutdown threshold. For sustained 1.5A operation, thermal relief vias under the pad are strongly recommended.
TL1963A-18DCQR 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-18DCQR FAQ
1.How can I place an order for TL1963A-18DCQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL1963A-18DCQR 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-18DCQR reliable?
The price and inventory of TL1963A-18DCQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL1963A-18DCQR is usually 5 days.
3.What payment methods are accepted for TL1963A-18DCQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL1963A-18DCQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL1963A-18DCQR?
TL1963A-18DCQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL1963A-18DCQR 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-18DCQR?
For technical support, including TL1963A-18DCQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL1963A-18DCQR requirements.
6.How does Aetrix verify that TL1963A-18DCQR is sourced from the original manufacturer or authorized distributors?
All TL1963A-18DCQR 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-18DCQR meets industry standards.
7.What is the process for return or replacement of TL1963A-18DCQR?
All TL1963A-18DCQR units undergo pre-shipment inspection (PSI). If there is an issue with TL1963A-18DCQR, 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-18DCQR part is unused and in its original packaging.
Return procedure for TL1963A-18DCQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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