TL431ACDBVRE4 Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
TL431ACDBVRE4 is an adjustable precision shunt voltage regulator from Texas Instruments with an output range of 2.495V to 36V and up to 100 mA output current. It offers tight initial accuracy and is housed in a compact SOT-23-5 package for power supply feedback applications.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- TL431ACDBVRE4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.0740(MOQ 2500)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TL431ACDBVRE4?
- Adjustable output voltage from 2.495V to 36V enabling flexible power supply feedback and voltage regulation designs
- Up to 100 mA sink current capability supporting direct feedback loop driving in flyback and buck converter designs
- Tight initial accuracy of 0.5% (A-grade) ensuring precise reference voltage for regulated power supplies
- Compact SOT-23-5 package with minimal external component requirements reducing PCB space and BOM cost
What is TL431ACDBVRE4 used for?
The TL431ACDBVRE4 is widely used as the feedback reference element in flyback, buck, and boost switching power supplies, where it senses the output voltage and controls the optocoupler or gate driver to maintain regulation. Its adjustable output range of 2.495V to 36V and 100 mA sink capability make it adaptable to a broad range of power supply topologies in consumer electronics, industrial equipment, and telecom systems. It is also used in battery charging circuits, overvoltage protection comparators, and precision voltage threshold detectors.
What are the specifications of TL431ACDBVRE4?
| 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 | COMMERCIAL |
| 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 | 8542.39.00.60 |
Where can I find the TL431ACDBVRE4 datasheet?
TL431ACDBVRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TL431ACDBVRE4?
Compatible alternatives and drop-in replacements for TL431ACDBVRE4:
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 TL431ACDBVRE4 be programmed and how is the output set?
The TL431ACDBVRE4 output can be adjusted from 2.495V up to 36V using a resistor divider network connected to its reference (REF) pin. The output voltage is set by the ratio of two external resistors according to the formula Vout = Vref x (1 + R1/R2), where Vref is the internal reference of approximately 2.495V. This makes it straightforward to program any desired regulation point within the supported range.
What is the maximum sink current of TL431ACDBVRE4 and how does this affect flyback converter feedback design?
The TL431ACDBVRE4 can sink up to 100 mA through its cathode, which is sufficient to drive most optocoupler LEDs directly in isolated flyback converter feedback loops. The high sink current allows the shunt regulator to respond quickly to output voltage transients, improving converter load regulation. In designs with fast transient requirements, this 100 mA capability reduces the need for additional buffer transistors in the feedback path.
How accurate is the TL431ACDBVRE4 reference voltage and which precision tier does the A-grade represent?
The TL431ACDBVRE4 carries the A-grade precision suffix, meaning the internal reference voltage accuracy is within 0.5% of the nominal 2.495V across the operating temperature range. This tight tolerance corresponds to an error of less than 13 mV at the reference node, making it suitable for regulated power supplies requiring output voltage accuracy better than 1% without additional trimming or calibration.
In what scenarios would TL431ACDBVRE4 in SOT-23-5 be a better choice than a larger SOT-23-3 shunt reference?
The SOT-23-5 package of TL431ACDBVRE4 provides 5 pins compared to the 3 pins of SOT-23-3 devices, accommodating the anode, cathode, and reference pin alongside two additional connections for better decoupling placement. In compact power supply modules with high-density layouts, the extra pins enable more robust bypass capacitor routing within 1 mm of the IC, improving transient response and reducing output voltage ripple, particularly at switching frequencies above 100 kHz.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 2500+ | $0.0800 | $200.00 |
| 3250+ | $0.0770 | $250.25 |
| 4055+ | $0.0740 | $300.07 |
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