TL431BQDCKTE4 Texas Instruments Integrated Circuit (SOT23 (6-Pin)) In Stock
The TL431BQDCKTE4 is a precision adjustable shunt voltage regulator from Texas Instruments with an output voltage range of 2.495V to 36V and a maximum output current of 100mA. It is housed in a compact 6-pin SOT-23 surface-mount package with RoHS-compliant lead-free construction. Available in stock worldwide with competitive pricing.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- OBSOLETE
- Datasheet
- TL431BQDCKTE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Precision adjustable output voltage from 2.495V to 36V with tight initial accuracy of ±0.5% at 25°C
- 100mA maximum output cathode current supporting a wide range of shunt regulator and voltage reference applications
- Compact 6-pin SOT-23 package (DCKT suffix) enabling minimal PCB footprint in space-constrained power supply designs
- AEC-Q100-qualified automotive-grade device suitable for temperature-range and reliability-critical environments
Applications
The TL431BQDCKTE4 is widely used as a precision voltage reference and feedback element in switching power supply feedback loops, including flyback converters and buck regulators, where adjustable output voltage accuracy is critical. It serves as an error amplifier in optocoupler-based isolated power supplies used in consumer electronics, automotive infotainment, and industrial equipment. Engineers also deploy it for overvoltage protection circuits, battery charger regulation, and precision threshold detection in signal conditioning applications.
Specifications
| YTEOL | 0 |
| Additional Feature | OUTPUT VOLTAGE ADJUSTABLE FROM 2.495V TO 36V |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE |
| JESD-30 Code | R-PDSO-G6 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 0.1A |
| Output Voltage-Max | 2.507V |
| Output Voltage-Min | 2.483V |
| Output Voltage-Nom | 2.495V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP6,.08 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 36V |
| Supply Voltage-Min (Vsup) | 2.495V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temp Coef of Voltage-Max | 92ppm/°C |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trim/Adjustable Output | YES |
| Voltage Tolerance-Max | 0.5% |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output voltage range of the TL431BQDCKTE4?
The TL431BQDCKTE4 offers an adjustable output voltage range from 2.495V to 36V, set via external resistors connected to the reference input pin. Its nominal reference voltage is 2.495V with a maximum of 2.507V and minimum of 2.483V over the specified operating conditions.
What package does the TL431BQDCKTE4 come in?
The TL431BQDCKTE4 is available in a 6-pin SOT-23 surface-mount package (JESD-30 R-PDSO-G6), which provides a compact footprint of approximately 2.9mm x 1.6mm, making it suitable for portable electronics, power modules, and high-density PCB layouts.
Is the TL431BQDCKTE4 suitable for automotive applications?
Yes, the Q in the part number indicates this is an AEC-Q100-qualified automotive-grade device from Texas Instruments, meaning it has passed automotive reliability qualification testing for use in vehicle electronics such as body control modules, infotainment systems, and ADAS power supplies.
What is the maximum output current of the TL431BQDCKTE4?
The TL431BQDCKTE4 supports a maximum cathode output current of 100mA, which is sufficient for use as a shunt regulator or voltage reference in low-power switching supplies, optocoupler feedback circuits, and precision analog signal conditioning circuits.
How is the TL431BQDCKTE4 typically used in a switching power supply?
In a typical isolated flyback power supply, the TL431BQDCKTE4 acts as the error amplifier on the secondary side. It compares the output voltage to its internal 2.495V reference and drives an optocoupler LED proportionally, which adjusts the primary-side PWM controller duty cycle to regulate the output voltage with high precision.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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