TL431IDBVR Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
TL431IDBVR is a 2%-accuracy adjustable precision shunt voltage regulator in a 5-pin SOT-23 package. It delivers a reference voltage adjustable from 2.495 V to 36 V with up to 100 mA output current. Available in stock worldwide with fast shipping for power-supply design applications.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- TL431IDBVR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.0610(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 2% accuracy adjustable shunt reference with output voltage programmable from 2.495 V to 36 V using two external resistors
- Up to 100 mA cathode current supports both shunt regulation and feedback control in flyback and linear power supplies
- Compact SOT-23 5-pin footprint minimizes board space while delivering precision voltage reference performance from -40°C to 125°C
Applications
TL431IDBVR is widely used as an adjustable voltage reference and feedback element in switch-mode power supplies, where it sets the output voltage regulation point via an optocoupler loop. It is suitable for battery chargers, LED driver circuits, and low-dropout linear regulators requiring a stable 2.495 V to 36 V reference. The 5-pin SOT-23 package suits portable and space-constrained consumer electronics and industrial power designs.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 0.1A |
| Output Voltage-Max | 2.55V |
| Output Voltage-Min | 2.44V |
| 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 |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temp Coef of Voltage-Max | 92ppm/°C |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| 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 | 2.204408% |
| ## TL431IDBVR Alternates Showing results | Image |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Mainland China, Philippines, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TL431IDBVR:
Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PDSO5
Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PDSO5
suggested
suggested
suggested
suggested
suggested
suggested
suggested
Two Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PDSO5
Two Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PDSO5
Frequently Asked Questions
What output voltage range can be set with TL431IDBVR and what sets the adjustment?
TL431IDBVR supports an adjustable output voltage from 2.495 V up to 36 V, programmed by two external resistors connected to the REF pin. This flexibility makes it suitable for a wide range of regulated power-supply rail voltages from 2.5 V logic references to higher-voltage analog rails.
How much cathode current can TL431IDBVR sink, and why does this matter for optocoupler-based SMPS feedback?
The device can sink up to 100 mA of cathode current, providing sufficient drive to operate an optocoupler LED in isolated flyback converter feedback loops. This current capability ensures stable regulation bandwidth and fast transient response without requiring an additional current buffer stage.
How does TL431IDBVR compare to a fixed Zener diode in a 3.3 V power rail application?
Unlike a fixed 3.3 V Zener with ±5% tolerance, TL431IDBVR achieves 2% accuracy and is adjustable from 2.495 V to 36 V, enabling precise 3.3 V rail regulation. Its low reference voltage temperature coefficient and tighter initial accuracy significantly reduce output voltage error over the -40°C to 125°C operating range.
Which package does TL431IDBVR use and what board footprint does it require?
TL431IDBVR comes in a 5-pin SOT-23 surface-mount package with a footprint of approximately 1.6 mm × 2.9 mm. This compact size is well suited for portable power supplies, handheld instruments, and high-density PCBs where board space is constrained.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.1070 | $0.11 |
| 100+ | $0.0820 | $8.20 |
| 500+ | $0.0690 | $34.50 |
| 1000+ | $0.0610 | $61.00 |
In Stock · 24h Response · Worldwide Shipping
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