TL431AIDBVTG4 Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
Texas Instruments TL431AIDBVTG4 is an adjustable precision shunt voltage reference with 2.495 V to 36 V output range, 100 mA sink current capability, AEC-Q100 automotive grade, in a compact 5-pin SOT-23 package.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- TL431AIDBVTG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Adjustable output voltage from 2.495 V to 36 V via two external resistors enables flexible reference and regulation design
- AEC-Q100 automotive qualification ensures reliable operation across -40°C to 125°C temperature range for in-vehicle applications
- 100 mA maximum cathode sink current supports direct use as shunt regulator in low to mid-power feedback loops
- Tight initial accuracy in the 'A' grade limits reference voltage error, reducing calibration overhead in precision power supplies
Applications
The TL431AIDBVTG4 is widely used as a precision feedback reference in isolated flyback and forward converter output stages, where the voltage sense node sets the optocoupler drive current to regulate the output. Its adjustable 2.495 V to 36 V range makes it suitable for battery charger voltage regulation, linear post-regulator feedback, and overvoltage protection circuits. The automotive-grade rating supports under-hood and cabin electronic control units (ECUs) where temperatures reach 125°C.
Specifications
| Pbfree Code | Yes |
| 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-G5 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 0.1A |
| Output Voltage-Max | 2.52V |
| Output Voltage-Min | 2.47V |
| Output Voltage-Nom | 2.495V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW 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 | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trim/Adjustable Output | YES |
| Voltage Tolerance-Max | 1% |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TL431AIDBVTG4:
Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PDSO5
Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PDSO5
Frequently Asked Questions
Over what voltage range can the TL431AIDBVTG4 be programmed, and how is the output set?
The TL431AIDBVTG4 output voltage is adjustable from 2.495 V to 36 V using two external resistors connected between the reference, cathode, and anode pins. The ratio of the resistor divider sets the regulated voltage according to the formula V_out = V_ref x (1 + R1/R2), where V_ref is the internal 2.495 V threshold, giving designers wide flexibility with standard 1% resistors.
What temperature range does the TL431AIDBVTG4 cover, and which automotive systems rely on its AEC-Q100 rating?
The TL431AIDBVTG4 is AEC-Q100 qualified, covering the -40°C to 125°C automotive temperature range. It is used in automotive ECUs, DC/DC converters for infotainment systems, LED driver feedback loops, and battery management circuits where the component must survive under-hood thermal extremes without reference drift or long-term degradation.
How much cathode current can the TL431AIDBVTG4 sink, and what does this enable in shunt regulator topologies?
The TL431AIDBVTG4 can sink up to 100 mA at the cathode. In a shunt regulator configuration, this allows direct regulation of small DC/DC converter outputs without an external pass transistor for loads below 100 mA, and in opto-feedback loops for isolated converters the current drives the LED of a PC817 optocoupler at the full rated 10 mA to 50 mA range.
Why choose the 5-pin SOT-23 package of TL431AIDBVTG4 over the traditional TO-92 TL431 for a compact power supply design?
The 5-pin SOT-23 package measures approximately 2.9 mm x 1.6 mm versus the TO-92 cylinder of roughly 5.2 mm diameter, reducing the PCB footprint by over 70%. SMD assembly also allows reflow soldering and pick-and-place automation, eliminating the manual through-hole insertion step and enabling higher placement density on double-sided boards.
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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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