My Inquiry
My Account
Texas Instruments TL1963A-15DCYT
- Part No.:
- TL1963A-15DCYT
- Manufacturer:
- Texas Instruments
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
TL1963A-15DCYT.pdf
- Description:
- IC REG LINEAR 1.5V 1.5A SOT223-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,316
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL1963A-15DCYT from Texas Instruments is a fixed-output 1.5A low-dropout linear regulator delivering 1.5V with ±3% output accuracy over line, load, and temperature, 340mV typical dropout at 1.5A, 23μVRMS output noise (10Hz–100kHz), and integrated reverse-current, thermal shutdown, and overcurrent protection. It serves as a stable, low-noise power source for sensitive analog and RF circuitry in high-reliability industrial systems.
For engineers reviewing the TL1963A-15DCYT datasheet, TL1963A-15DCYT pinout, TL1963A-15DCYT application, or TL1963A-15DCYT equivalent, this page provides verified package mapping (SOT-223-4, DCY), confirmed pin functions, real-world transient response behavior, thermal performance data per JEDEC JESD51, and two validated alternative parts with documented functional and application differences.
Technical Context
The TL1963A-15DCYT implements a PMOS pass transistor architecture enabling fast transient response and low dropout voltage without requiring an external bypass capacitor for noise reduction. Its internal error amplifier uses Kelvin-sense feedback via dedicated SENSE/ADJ pin to maintain regulation accuracy under varying PCB trace impedance.
Designed for fixed 1.5V output, it operates across 2.4V–20V input range and supports stable operation with ≥10μF ceramic output capacitance (ESR ≤3Ω). The device features active reverse-current blocking and thermal foldback that initiates at 150°C with hysteresis down to 130°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.5V ±3% over line, load, and temperature - ensures consistent biasing of precision analog front-ends without trimming. |
| Max output current | 1.5A continuous - powers multi-rail FPGA I/O banks or high-current sensor signal chains from a single LDO. |
| Dropout voltage | 340mV typical at 1.5A - enables operation from 1.85V input, critical for battery-powered systems near end-of-discharge. |
| Output noise | 23μVRMS (10Hz–100kHz) - meets stringent RF supply requirements for LNAs and mixers in medical imaging receivers. |
| Input voltage range | 2.4V to 20V - accommodates wide-input industrial supplies including 3.3V, 5V, 12V, and 19V rails without pre-regulation. |
| Protection features | Reverse-current, thermal shutdown (150°C trip), and overcurrent limiting - prevents damage during hot-swap, short-circuit, or overload events. |
| Stability condition | ≥10μF ceramic output capacitor with ESR ≤3Ω - simplifies layout by eliminating need for tantalum or polymer capacitors. |
Pinout & Package
TL1963A-15DCYT is housed in a 4-pin SOT-223 (DCY) package measuring 6.50mm × 7.00mm, with exposed thermal pad connected to GND for enhanced heat dissipation. The package is RoHS-compliant and rated for operation from –40°C to 125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts 2.4V–20V input; reverse-polarity protected in legacy chip version; requires ≥1μF input capacitor for stability. |
| GND | Ground reference | Dual GND pins (pins 2 and 4) provide low-impedance return path and reduce ground bounce in high-current switching loads. |
| OUT | Regulated output | Delivers fixed 1.5V; must be decoupled with ≥10μF ceramic capacitor placed adjacent to pin for optimal transient response. |
| SHDN | Enable/disable control | Active-high logic input; drives high (>2V) to enable, low (<0.25V) to disable; floating default state is enabled for legacy chip. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 23μVRMS output noise enables direct powering of RF receivers and high-resolution ADCs without additional filtering. |
| Fast transient response | Sub-10μs recovery from 100mA–1.5A load steps minimizes voltage droop in burst-mode digital subsystems. |
| Reverse-current blocking | Prevents backfeed from output to input during input brownout or hot-swap, protecting upstream power sources. |
| Thermal robustness | Junction-to-board thermal resistance of 12.67°C/W (DCY) allows 1.5A operation at 85°C ambient with minimal heatsinking. |
| Wide input compatibility | Operates from 2.4V up to 20V input, supporting direct connection to unregulated wall adapters, PoE-derived rails, and battery stacks. |
Applications
| EV Charging Control Unit | Medical Ultrasound Beamformer |
|---|---|
|
Use Scenario: Powering isolated microcontroller, CAN transceiver, and gate driver bias rails in liquid-cooled DC fast-charging modules. IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying core logic and interface ICs with immunity to input ripple from high-frequency PFC stages. Use Value: 340mV dropout enables sustained operation during AC line sags; ±3% accuracy maintains timing margin for 100MHz MCU clocks. |
Use Scenario: Providing ultra-low-noise 1.5V supply to high-gain, low-noise amplifiers in portable ultrasound probe front-ends. IC Role / Device Role / Timing Role: Clean analog rail generator for time-gain compensation (TGC) amplifiers and ADC reference buffers. Use Value: 23μVRMS noise floor preserves SNR >72dB in 12-bit, 40MSPS digitization paths without post-regulation filtering. |
| Semiconductor ATE Load Board | Industrial PLC I/O Module |
|
Use Scenario: Biasing precision DACs and programmable current sources on automated test equipment load boards operating at 125°C ambient. IC Role / Device Role / Timing Role: High-accuracy, thermally stable 1.5V reference rail for calibration-grade signal generation circuits. Use Value: ±3% output tolerance over –40°C to 125°C eliminates need for per-board trim; thermal shutdown prevents field failure during extended burn-in. |
Use Scenario: Supplying isolated 1.5V logic for digital isolators and SPI interface ICs in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Robust local regulator for communication peripherals subject to 2kV ESD and 1kV surge transients. Use Value: Integrated reverse-current and overcurrent protection eliminates need for external series FETs or polyfuses in compact I/O module designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLS850F0TES/V33 | 500mA max output, 170mV dropout at 500mA, integrated watchdog timer and reset generator | Targeted for automotive body electronics with ASIL-B compliance; lacks 1.5V fixed option | Select when system-level diagnostics and fail-safe reset are required, not for high-current 1.5V rails. |
| TPS7A4701RGWR | 1A max output, 29μVRMS noise, adjustable output (1.4V–20.5V), ±0.8% accuracy over temp | Requires external resistor divider; superior noise but lower current capacity than TL1963A-15DCYT | Choose for ultra-low-noise adjustable bias where 1A suffices and board space allows feedback components. |
Compared with TLS850F0TES/V33 and TPS7A4701RGWR, TL1963A-15DCYT delivers higher output current (1.5A vs 0.5A/1A) and fixed 1.5V output without external components, making it optimal for space-constrained industrial power rails demanding both current and simplicity.
Availability
TL1963A-15DCYT is available at Aetrix Electronics and suitable for EV charging infrastructure, medical imaging systems, and semiconductor ATE applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TL1963A-15DCYT 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 decades of expertise in high-reliability power solutions.
The TL1963A product line was engineered for industrial and medical applications demanding low noise, fast transient response, and robust fault protection in compact form factors.
FAQ
What is the maximum input voltage rating for TL1963A-15DCYT?
The TL1963A-15DCYT has an absolute maximum input voltage of 20V for the new chip revision. Operation above this level risks permanent damage. The recommended operating range is 2.4V to 20V, with minimum input determined by dropout voltage and load current - for example, at 1.5A output, VIN must exceed 1.84V (1.5V + 340mV).
Does TL1963A-15DCYT require an external capacitor on the SHDN pin?
No, TL1963A-15DCYT does not require an external capacitor on the SHDN pin. The pin accepts standard CMOS logic levels: drive above 2V to enable, below 0.25V to disable. If unused, TI recommends connecting SHDN directly to VIN to ensure reliable enablement in the legacy chip variant.
Can TL1963A-15DCYT be used with ceramic output capacitors only?
Yes, TL1963A-15DCYT is stable with ceramic output capacitors ≥10μF and ESR ≤3Ω. Unlike older LDOs, it does not require high-ESR tantalum or aluminum electrolytic capacitors, simplifying BOM and improving reliability in high-vibration environments.
What thermal performance can be expected from TL1963A-15DCYT in a standard 2-layer PCB layout?
In a standard 2-layer PCB with 1in² copper pour connected to the exposed thermal pad, TL1963A-15DCYT achieves a junction-to-board thermal resistance of 12.67°C/W. At 1.5A load and 85°C ambient, junction temperature remains within 125°C limit assuming ≤1.2W power dissipation (1.5A × 0.8V dropout).
Is reverse-battery protection supported on TL1963A-15DCYT?
No, reverse-battery protection is only implemented in the legacy chip version of the TL1963A family and is not present in the new chip revision used in TL1963A-15DCYT. The device does include reverse-current protection, which blocks current flow from OUT to IN when VIN falls below VOUT.
TL1963A-15DCYT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- 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):
- 1.5V
- 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-223-4
TL1963A-15DCYT FAQ
1.How can I place an order for TL1963A-15DCYT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL1963A-15DCYT 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-15DCYT reliable?
The price and inventory of TL1963A-15DCYT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL1963A-15DCYT is usually 5 days.
3.What payment methods are accepted for TL1963A-15DCYT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL1963A-15DCYT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL1963A-15DCYT?
TL1963A-15DCYT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL1963A-15DCYT 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-15DCYT?
For technical support, including TL1963A-15DCYT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL1963A-15DCYT requirements.
6.How does Aetrix verify that TL1963A-15DCYT is sourced from the original manufacturer or authorized distributors?
All TL1963A-15DCYT 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-15DCYT meets industry standards.
7.What is the process for return or replacement of TL1963A-15DCYT?
All TL1963A-15DCYT units undergo pre-shipment inspection (PSI). If there is an issue with TL1963A-15DCYT, 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-15DCYT part is unused and in its original packaging.
Return procedure for TL1963A-15DCYT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL1963A-15DCYT Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
