TL431CLPRE3 Texas Instruments Integrated Circuit (TO-92) In Stock
TL431CLPRE3 is an adjustable precision shunt voltage reference IC with 2.2% initial accuracy and output voltage range from 2.5V to 36V. Operates as a two-terminal programmable zener replacement in 3-pin TO-92 through-hole package. Available from Texas Instruments in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- TO-92
- Pin Count
- 999
- Lifecycle
- OBSOLETE
- Datasheet
- TL431CLPRE3 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.0616(MOQ 250)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Adjustable output voltage from 2.5 V to 36 V with only 2 external resistors
- 2.2% initial accuracy over temperature for precise voltage regulation in feedback loops
- Low cathode current from 1 mA enables use in low-power standby and reference circuits
Applications
TL431CLPRE3 is used as a programmable voltage reference and error amplifier in switched-mode power supply feedback circuits, where it sets the regulated output voltage with high accuracy. Its adjustable 2.5 V to 36 V range and low 1 mA operating current make it ideal for optocoupler-isolated feedback loops in flyback and buck converters. The TO-92 through-hole package also suits prototyping, legacy industrial power boards, and educational electronics kits requiring a reliable shunt reference.
Specifications
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| Date Of Intro | 2017-07-09 |
| YTEOL | 0 |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE |
| JESD-30 Code | O-XBCY-T3 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Voltage-Max | 2.55V |
| Output Voltage-Min | 2.44V |
| Output Voltage-Nom | 2.495V |
| Package Body Material | UNSPECIFIED |
| Package Shape | ROUND |
| Package Style | CYLINDRICAL |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Temp Coef of Voltage-Max | 92ppm/°C |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Position | BOTTOM |
| Trim/Adjustable Output | YES |
| Package | TO-92 |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage range does TL431CLPRE3 support and how is it set?
TL431CLPRE3 supports an adjustable output voltage from 2.5 V to 36 V, programmed using 2 external resistors connected to its reference (REF) pin. With a 2.2% initial accuracy at a 2.495 V internal reference, it provides a stable and precise regulated voltage suitable for power supply feedback networks and analog voltage references.
How is TL431CLPRE3 used in isolated flyback power supply designs?
In isolated flyback converters, TL431CLPRE3 serves as the error amplifier on the secondary side, comparing the output voltage against its 2.495 V internal reference and driving an optocoupler. The optocoupler then modulates the primary-side PWM controller, achieving tight regulation within 2.2% accuracy across load and line variations from 5 V to 36 V output configurations.
What is the minimum cathode current for TL431CLPRE3 and how does it affect low-power circuit designs?
TL431CLPRE3 requires a minimum cathode current of approximately 1 mA to maintain regulation. This low threshold makes it suitable for standby-mode power supplies and low-power reference circuits where minimizing quiescent current consumption is important, such as in always-on 5 V USB charger standby rails or 12 V industrial sensor supplies.
Is TL431CLPRE3 RoHS-compliant and what package does it come in?
Yes, TL431CLPRE3 is Pb-free and RoHS-compliant (JESD-609 code e3, REACH Compliant). It is supplied in a 3-pin TO-92 through-hole plastic package, which is easy to hand-solder and well-suited for prototyping, repair boards, and through-hole industrial designs requiring a rugged, long-life shunt reference.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
Why Buy from FindMyChip
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 |
|---|---|---|
| 250+ | $0.0823 | $20.58 |
| 500+ | $0.0777 | $38.87 |
| 1000+ | $0.0740 | $73.97 |
| 2000+ | $0.0709 | $141.72 |
| 3125+ | $0.0640 | $200.00 |
| 4060+ | $0.0616 | $250.10 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”