TL431CPSRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments TL431CPSRG4 is an adjustable precision shunt regulator with output voltage programmable from 2.495 V to 36 V, 100 mA maximum output current, and sharp turn-on characteristic, in an 8-pin SOIC package.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TL431CPSRG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TL431CPSRG4?
- Adjustable output voltage from 2.495 V to 36 V set by two external resistors, covering a wide range of voltage reference and regulator applications
- 100 mA maximum cathode current with sharp 2.5 V reference threshold enables use as precision voltage reference and feedback element in SMPS designs
- 8-pin SOIC surface-mount package allows easy PCB integration in power supply feedback loops, overvoltage protection, and voltage monitoring circuits
What is TL431CPSRG4 used for?
The TL431CPSRG4 is widely used as a programmable voltage reference and error amplifier in switching power supply feedback loops, where its adjustable 2.495 V to 36 V output threshold controls the optocoupler in isolated flyback and forward converters. It is also applied in overvoltage protection circuits, battery monitoring systems, and precision voltage monitoring for industrial and consumer electronics.
What are the specifications of TL431CPSRG4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | OUTPUT VOLTAGE ADJUSTABLE FROM 2.495V TO 36V |
| 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 | 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 | SOP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 36V |
| Supply Voltage-Min (Vsup) | 2.495V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temp Coef of Voltage-Max | 92ppm/°C |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| 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 | 2% |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Malaysia |
Where can I find the TL431CPSRG4 datasheet?
TL431CPSRG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TL431CPSRG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Over what voltage range can the TL431CPSRG4 output be programmed?
The TL431CPSRG4 output voltage is adjustable from 2.495 V to 36 V using two external resistors connected to its reference input. This wide programmable range makes it suitable for voltage reference circuits, power supply regulation, and output voltage monitoring across a broad spectrum of power supply designs.
How is the TL431CPSRG4 used in an isolated flyback power supply?
In an isolated flyback converter, the TL431CPSRG4 acts as the error amplifier on the secondary side, comparing the output voltage against its internal 2.495 V reference. Its cathode current drives an optocoupler LED to transmit the error signal across the isolation barrier to the primary-side PWM controller, regulating output voltage with up to 100 mA drive capability.
What maximum current can the TL431CPSRG4 sink, and how does this affect circuit design?
The TL431CPSRG4 can sink up to 100 mA of cathode current, which sets the upper limit for its shunt regulation and optocoupler drive applications. Designers must size the series limiting resistor to keep cathode current below this threshold while ensuring enough current flows through the optocoupler LED for reliable signal transmission in power supply feedback loops.
Is the TL431CPSRG4 an alternative to a discrete Zener diode in precision reference applications?
Yes, the TL431CPSRG4 is a direct alternative to fixed Zener diodes where an adjustable or tighter-tolerance reference voltage is needed. Unlike a Zener, its 2.495 V to 36 V programmable range and sharp 2.5 V threshold reduce temperature drift and component count, making it more accurate for ADC reference and voltage monitoring circuits.
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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.
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