TL431BCPW Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments TL431BCPW is an adjustable precision shunt voltage regulator in 8-pin SOIC with output voltage adjustable from 2.495 V to 36 V and 100 mA output current. Features tight 0.4% initial accuracy and low dynamic impedance. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TL431BCPW Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2123(MOQ 671)
- 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 TL431BCPW?
- Output voltage adjustable from 2.495 V to 36 V via external resistor divider for flexible regulation
- 100 mA maximum output current with low dynamic impedance for stable reference performance
- Precision 2.495 V to 2.507 V output voltage range ensuring tight 0.4% initial accuracy
What is TL431BCPW used for?
The TL431BCPW serves as a precision voltage reference and shunt regulator in switched-mode power supplies, optocoupler feedback loops, and battery charger circuits. Its adjustable 2.495 V to 36 V output range makes it versatile for setting feedback thresholds in flyback converters and linear regulators. The 8-pin SOIC package simplifies PCB layout in compact power management and analog reference applications.
What are the specifications of TL431BCPW?
| 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 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 0.1A |
| Output Voltage-Max | 2.507V |
| Output Voltage-Min | 2.483V |
| Output Voltage-Nom | 2.495V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temp Coef of Voltage-Max | 92ppm/°C |
| Temperature Grade | COMMERCIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Trim/Adjustable Output | YES |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the TL431BCPW datasheet?
TL431BCPW Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TL431BCPW?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Over what voltage range can the TL431BCPW output be adjusted and how is it set?
The TL431BCPW output is adjustable from 2.495 V to 36 V using an external resistor voltage divider connected to its reference input pin. The reference voltage is 2.495 V nominal, so selecting resistor values sets the desired output level across the 36 V span with 100 mA maximum output current capability.
Why is the TL431BCPW commonly used in flyback converter optocoupler feedback circuits?
The TL431BCPW acts as a precision error amplifier in the optocoupler feedback path of isolated flyback converters, comparing the output voltage against its stable 2.495 V reference. Its low dynamic impedance and tight 0.4% initial accuracy reduce output voltage regulation error, while the 100 mA cathode current drive provides sufficient current to bias the optocoupler LED effectively.
How does the TL431BCPW differ from standard TL431 variants for precision reference applications?
The B-grade TL431BCPW offers tighter initial accuracy with a reference voltage between 2.483 V and 2.507 V, compared to A-grade parts with wider tolerance. This precision matters in battery management and measurement circuits where reference voltage variation directly affects analog-to-digital conversion accuracy or threshold detection across the 2.495 V to 36 V operating range.
What package does TL431BCPW use and how does it compare to SOT-23 alternatives for board density?
The TL431BCPW uses an 8-pin SOIC (R-PDSO-G8) package measuring approximately 5 mm x 4 mm, larger than SOT-23 3-pin variants. While SOT-23 TL431 variants save board space, the 8-pin SOIC provides additional pins useful for bypass capacitors and noise-reduction networks in precision reference applications requiring stability up to 100 mA output.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 671+ | $0.4500 | $301.95 |
| 1000+ | $0.2968 | $296.80 |
| 1800+ | $0.2123 | $382.19 |
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