TL431LIACDBZR Texas Instruments Integrated Circuit (SOT23 (3-Pin)) In Stock
The TL431LIACDBZR is an adjustable precision shunt regulator from Texas Instruments with an optimized 2.495V reference voltage and output voltage range from 2.495V to operating maximum, in a 3-pin SOT-23 package. It features low reference current for improved accuracy in low-power circuits and is RoHS compliant. Widely used in switching power supply feedback and precision voltage reference designs.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- TL431LIACDBZR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.0563(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Precision 2.495V internal voltage reference with tight ±0.5% initial accuracy
- Adjustable output voltage from 2.495V to supply rail via external resistor divider
- Optimized low reference current for improved regulation accuracy in low-power designs
- 3-pin SOT-23 ultra-compact package for space-constrained PCB layouts
- Wide cathode voltage range for flexible shunt regulator or error amplifier configurations
- RoHS compliant and lead-free with JEDEC e4 coding for green electronics compliance
Applications
The TL431LIACDBZR is extensively used as a precision voltage reference and error amplifier in switching power supply feedback loops, including flyback converters, buck regulators, and linear power supplies. It is also used in overvoltage protection circuits, adjustable voltage reference modules, and LED driver feedback control for portable consumer electronics and industrial power systems.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Voltage-Max | 2.52V |
| Output Voltage-Min | 2.47V |
| Output Voltage-Nom | 2.495V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage-Max (Vsup) | 36V |
| Supply Voltage-Min (Vsup) | 2.47V |
| Surface Mount | YES |
| Temp Coef of Voltage-Max | 63ppm/°C |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trim/Adjustable Output | YES |
| ## TL431LIACDBZR Alternates Showing results | Image |
| Package | SOT23 (3-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 | Philippines |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TL431LIACDBZR:
Two Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, PDSO3
Two Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, PDSO3
Two Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, PDSO3
Two Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, PDSO3
Two Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, PDSO3
Two Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, PDSO3
Frequently Asked Questions
What is the reference voltage of the TL431LIACDBZR?
The TL431LIACDBZR has a precision internal reference voltage of 2.495V (nominal), with output voltage adjustable from 2.495V upward using an external resistor divider. The reference accuracy is optimized for low reference current applications requiring high precision.
What package does the TL431LIACDBZR come in?
The TL431LIACDBZR is packaged in a 3-pin SOT-23 surface-mount package, which is one of the smallest available for discrete semiconductor devices, making it ideal for high-density PCB designs in portable consumer electronics and compact power supplies.
How is the TL431LIACDBZR typically used in power supply designs?
The TL431LIACDBZR is commonly used as an error amplifier in the feedback loop of isolated switching power supplies such as flyback converters. The reference pin senses the output voltage via a resistor divider, and the cathode current drives an optocoupler to control the primary-side PWM controller, regulating the output voltage.
Is the TL431LIACDBZR RoHS compliant?
Yes, the TL431LIACDBZR is RoHS compliant and lead-free, designated by the JESD-609 e4 code. It meets all global environmental regulations for hazardous substances, making it suitable for consumer electronics, industrial, and automotive electronic products.
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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+ | $0.5000 | $0.50 |
| 41+ | $0.1500 | $6.15 |
| 200+ | $0.1313 | $26.26 |
| 334+ | $0.1000 | $33.40 |
| 850+ | $0.0750 | $63.75 |
| 3000+ | $0.0563 | $168.90 |
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