TL431IPK Texas Instruments Integrated Circuit (Other) In Stock
TL431IPK is an adjustable precision shunt voltage reference from Texas Instruments covering 2.495 V to 36 V with a 100 mA output current capability. It is housed in a 4-pin SOT-89 package and meets automotive-grade reliability requirements per AEC-Q100. Available in stock worldwide with global shipping options.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- TL431IPK Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.0589(MOQ 35)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Wide adjustable output voltage range from 2.495 V to 36 V makes it versatile for diverse power supply feedback and voltage monitoring applications
- 100 mA maximum output current capability in a compact SOT-89 4-pin package supports moderate load-driving without external transistors
- Automotive-grade qualification ensures operation across -40°C to +125°C temperature range with enhanced reliability for harsh environments
Applications
The TL431IPK is widely used as a precision voltage reference in switch-mode power supply feedback loops, where its adjustable 2.495 V to 36 V output sets the regulation point. It is also employed in battery charger circuits and linear regulator designs requiring a stable reference with low output impedance. Automotive ECU power management and industrial instrumentation circuits benefit from its AEC-Q100-grade robustness over the full -40°C to +125°C operating range.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | OUTPUT VOLTAGE ADJUSTABLE FROM 2.495V TO 36V |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE |
| JESD-30 Code | R-PSSO-F3 |
| 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 | TO-243 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE |
| 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 | FLAT |
| Terminal Pitch | 1.5mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trim/Adjustable Output | YES |
| Voltage Tolerance-Max | 2.204408% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage range does TL431IPK support and how is it set?
TL431IPK supports an adjustable output voltage from 2.495 V to 36 V, programmed by an external resistor divider connected to its reference (REF) pin. A simple two-resistor network allows designers to target any voltage within this range, making it suitable for regulator feedback in 3.3 V, 5 V, 12 V, and custom output rails in a single design.
For an automotive power supply design, what temperature range does TL431IPK guarantee operation?
TL431IPK is rated for the full automotive temperature range of -40°C to +125°C. Its AEC-Q100 qualification ensures reliable performance across engine-compartment and cabin temperature extremes, making it a trusted choice for ECU voltage regulators, gateway modules, and ADAS power rails that must withstand harsh automotive environmental stress.
How does the SOT-89 package of TL431IPK help in board layout for power supply designs?
The 4-pin SOT-89 (R-PSSO-F3) package includes an exposed tab for improved thermal dissipation, allowing up to 100 mA of output current without excessive junction temperature rise. Its compact footprint — approximately 4.5 mm x 2.5 mm — fits easily on dense PCBs, and the through-hole-compatible lead pitch simplifies prototyping and hand-soldering during development iterations.
When would TL431IPK be selected over a fixed voltage reference like TL431IDBZR?
TL431IPK is preferred when the target output voltage is not a standard fixed value or when one part number must cover multiple product variants with different rails between 2.495 V and 36 V. The SOT-89 package with its tab also provides better thermal performance at higher currents close to 100 mA compared to smaller packages, reducing the need for external heat management components.
Related Guides
EEEFK1E470P Selection Guide for 47 uF SMD Aluminum Electrolytic Capacitors
Selection guidance for EEEFK1E470P and nearby Panasonic FK or FT SMD aluminum electrolytic capacitors for power-rail bulk decoupling.
Jul 7, 2026
EEEFT1V101AP Design Guide for SMD Aluminum Electrolytic Bulk Decoupling
Design guidance for using EEEFT1V101AP as an SMD aluminum electrolytic bulk capacitor in power-rail decoupling and hold-up networks.
Jul 7, 2026
How to Choose a 3528 SMD Indicator LED for Blue Status Lighting: Selection Guide
A practical 3528 SMD indicator LED selection guide using 150141BS73100 and related Wurth 150141 variants for blue status lighting.
Jul 5, 2026
BAS70KFILM Design Guide for Low-Leakage Signal Clamping and RF Detector Inputs
Practical BAS70KFILM design guidance for signal clamps, RF detector inputs, leakage control, capacitance, layout, and sourcing alternatives.
Jul 5, 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 |
|---|---|---|
| 35+ | $0.1950 | $6.83 |
| 100+ | $0.0685 | $6.85 |
| 1000+ | $0.0653 | $65.30 |
| 10000+ | $0.0589 | $589.00 |
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.”