TLV431AID Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments TLV431AID is an adjustable shunt voltage reference with 1.24 V to 6 V output range and plus-or-minus 1% initial accuracy in an 8-pin SOIC package, drawing only 80 uA typical cathode current. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TLV431AID Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3953(MOQ 1)
- 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 TLV431AID?
- Adjustable shunt reference from 1.24 V to 6 V with 1% initial accuracy for precision regulation in low-voltage power supplies
- 80 uA typical cathode current enabling operation in current-limited bias networks where power consumption is critical
- 2.5 mA to 20 mA cathode current range providing wide biasing flexibility for error amplifier and feedback divider circuits
What is TLV431AID used for?
TLV431AID is commonly used as a precision feedback element in flyback and buck converter error amplifiers, where its 1.24 V reference and 6 V maximum output voltage suit compact 3.3 V and 5 V rail designs. It also serves as a low-cost comparator reference in battery threshold detection, LED constant-current bias circuits, and precision voltage monitoring in industrial power modules. The 8-pin SOIC package supports both automated SMT assembly across consumer electronics, IoT devices, and industrial power management applications.
What are the specifications of TLV431AID?
| Date Of Intro | 1996-01-01 |
| YTEOL | 0 |
| Additional Feature | IT HAS 1.24V TO 6V ADJUSTABLE OUTPUT |
| 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 | 15A |
| Output Voltage-Max | 1.252V |
| Output Voltage-Min | 1.228V |
| Output Voltage-Nom | 1.24V |
| 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 |
| Temp Coef of Voltage-Max | 138ppm/°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 | 1% |
| Package | Small Outline Packages |
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 TLV431AID datasheet?
TLV431AID Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TLV431AID?
Compatible alternatives and drop-in replacements for TLV431AID:
Voltage Reference, 1 Output, 1.24V, Trim/Adjustable, BIPolar, PDSO8
Two Terminal Voltage Reference, 1 Output, 1.24V, Trim/Adjustable, PDSO5
Two Terminal Voltage Reference, 1 Output, 1.24V, Trim/Adjustable, PDSO3
Two Terminal Voltage Reference, 1 Output, 1.24V, Trim/Adjustable, PDSO5
Two Terminal Voltage Reference, 1 Output, 1.24V, Trim/Adjustable, BIPolar, PDSO5
Two Terminal Voltage Reference, 1 Output, 1.24V, Trim/Adjustable, PDSO3
Frequently Asked Questions
How does TLV431AID achieve a 1.24 V reference voltage and what sets the output above that minimum?
TLV431AID uses an internal bandgap reference trimmed to a 1.24 V threshold at the REF pin. Setting the output above 1.24 V requires two external resistors forming a voltage divider from cathode to REF to ground; the R1/R2 ratio determines the regulated cathode voltage up to 6 V. This standard shunt-regulator topology allows the same SOIC-8 part to generate any rail between 1.24 V and 6 V with 1% accuracy.
What cathode current range is TLV431AID specified for and why does it matter for flyback optocoupler drive?
TLV431AID operates with cathode current from 2.5 mA to 20 mA. In an isolated flyback converter, the cathode typically drives an optocoupler LED in series, and the 2.5 mA minimum ensures the internal reference remains in regulation even at light load when LED current is low. The 20 mA maximum sets the upper coupling range. The 1% initial accuracy over the 2.5 mA to 20 mA range means loop gain calculations remain predictable without additional trimming.
How does TLV431AID compare to the TL431 when both are used in a 3.3 V reference circuit?
TLV431AID has a 1.24 V minimum reference voltage versus 2.495 V for the classic TL431, making TLV431AID the better choice for 3.3 V and lower rails where TL431 feedback divider resistor ratios increase quiescent power. TLV431AID also operates from approximately 80 uA cathode current in some configurations, compared to TL431's 1 mA minimum, further reducing standby dissipation in battery-powered and always-on designs.
In a battery over-voltage protection circuit, at what voltage threshold can TLV431AID trigger a MOSFET cutoff?
TLV431AID can trigger a cutoff at any voltage between 1.24 V and 6 V depending on the resistor divider ratio set on the REF pin. For a 4.2 V lithium-cell over-voltage cutoff, a divider of approximately R1 = 25 kohm and R2 = 10 kohm scales 4.2 V down to the 1.24 V threshold. The cathode output then drives an N-channel MOSFET gate or optocoupler to disconnect the charge path within microseconds of the threshold crossing.
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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 |
|---|---|---|
| 1+ | $0.9486 | $0.95 |
| 89+ | $0.4427 | $39.40 |
| 453+ | $0.3953 | $179.07 |
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