TL431BIDE4 Texas Instruments Integrated Circuit (Other) In Stock
TL431BIDE4 is a precision programmable shunt voltage reference with adjustable output from 2.495 V to 36 V and maximum cathode current of 100 mA, housed in an 8-pin SOIC package. It features tight initial accuracy and low temperature coefficient for stable power-supply feedback. Commonly used in switching power supplies, linear regulators, and battery management circuits.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TL431BIDE4 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
What are the key features of TL431BIDE4?
- Adjustable output voltage from 2.495 V to 36 V with external resistors
- Initial accuracy of ±0.5% at 25°C for precision reference designs
- Maximum cathode current of 100 mA for output driving flexibility
- Low dynamic impedance suitable for feedback in SMPS control loops
- 8-pin SOIC (SOIC-8) package rated for industrial temperature range
- Grade B precision with tight 2.495 V to 2.507 V reference band
What is TL431BIDE4 used for?
The TL431BIDE4 is widely used as a feedback reference in flyback and buck switching power supplies, providing accurate output voltage regulation from 2.495 V to 36 V. It also serves in linear voltage regulator designs, overvoltage protection circuits, and battery charger management systems where precision reference accuracy of ±0.5% is required. Industrial instrumentation and telecom power modules benefit from its stable shunt reference behavior across the operating temperature range.
What are the specifications of TL431BIDE4?
| 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-G8 |
| 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 | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temp Coef of Voltage-Max | 92ppm/°C |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trim/Adjustable Output | YES |
| Voltage Tolerance-Max | 0.5% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mexico |
Where can I find the TL431BIDE4 datasheet?
TL431BIDE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TL431BIDE4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Over what output voltage range can TL431BIDE4 be programmed?
The TL431BIDE4 can be programmed via external resistors to set the output voltage anywhere from 2.495 V up to 36 V, giving designers wide flexibility for power supply feedback. Its reference pin nominally sits at 2.495 V to 2.507 V, and resistor dividers scale that to the desired rail voltage with ±0.5% initial accuracy.
How does TL431BIDE4 fit into a flyback SMPS optocoupler feedback loop?
In a flyback converter, the TL431BIDE4 monitors the output voltage via a resistor divider connected to its reference pin, then drives an optocoupler LED to signal the primary-side controller. Its 100 mA maximum cathode current and low dynamic impedance (typically 0.2 Ω) support stable closed-loop regulation, and the 2.495 V reference threshold ensures accurate regulation to within ±0.5% across the -40°C to 125°C industrial range.
What package does TL431BIDE4 use and how many pins does it have?
The TL431BIDE4 comes in an 8-pin SOIC (JESD-30 code R-PDSO-G8) surface-mount package, occupying approximately 5 mm × 4 mm of PCB area. The 8-pin format provides extra pins that can be tied for thermal or layout symmetry benefits compared to the 3-pin TO-92 version, while maintaining the same ±0.5% reference accuracy and 36 V maximum output rating.
When should a designer choose TL431BIDE4 over the standard TL431 grade?
Designers should select TL431BIDE4 when tighter initial accuracy is required: the B-grade guarantees a reference band of 2.483 V to 2.507 V (±0.5%), while the standard A-grade allows ±1%. This precision matters in battery management circuits targeting within ±1% output voltage regulation, high-accuracy linear references in industrial instrumentation, or any design where calibration trimming is not practical after assembly.
Can TL431BIDE4 operate across the full industrial temperature range?
Yes, the TL431BIDE4 is specified for the industrial temperature range of -40°C to 125°C, making it suitable for automotive-adjacent power modules, outdoor industrial equipment, and telecom DC-DC converters exposed to wide thermal environments. Its temperature coefficient is typically less than 50 ppm/°C, ensuring that the 2.495 V reference shifts by no more than a few millivolts across the full -40°C to 125°C span.
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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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