TL431AIDG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
TL431AIDG4 is an automotive-grade adjustable precision voltage reference with an output range of 2.495V to 36V and up to 100mA sink current. It is packaged in an 8-pin SOIC for robust feedback control in power supplies.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TL431AIDG4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1665(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Adjustable output voltage from 2.495V to 36V set by two external resistors for flexible reference design
- Up to 100mA cathode sink current enables direct use as a shunt regulator or error amplifier
- AEC-Q100 automotive qualification ensures reliable operation across -40°C to 125°C temperature range
- Low reference voltage tolerance of ±0.5% at 25°C for precision feedback in SMPS and LDO designs
Applications
The TL431AIDG4 is widely used as the feedback reference in isolated flyback converters and non-isolated buck/boost power supplies across consumer and automotive electronics. Its adjustable 2.495V to 36V output enables fine-tuning of output setpoints through a simple resistor divider network, making it a staple component in optocoupler feedback loops of AC-DC adapters. Automotive qualification makes it equally appropriate for 12V/24V vehicle subsystems including ADAS power rails and body control modules.
Specifications
| 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 | 2.52V |
| Output Voltage-Min | 2.47V |
| Output Voltage-Nom | 2.495V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 100mA |
| 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 | INDUSTRIAL |
| 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 | 1% |
| 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 | Mexico |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TL431AIDG4:
Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PDSO8
Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PDSO8
Two Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, BIPolar, PDSO8
Frequently Asked Questions
How is the output voltage of the TL431AIDG4 set in a power supply feedback circuit?
Output voltage is programmed by a resistor divider between the output rail and the reference pin. Selecting appropriate resistor values between 1kΩ and 100kΩ sets any voltage from 2.495V to 36V, giving designers full flexibility without changing the IC or requiring an adjustable potentiometer.
What makes the TL431AIDG4 suitable for automotive power supply feedback loops?
The TL431AIDG4 is AEC-Q100 qualified, operates across -40°C to 125°C, and withstands the 36V maximum output typical in automotive 12V and 24V environments. Its tight ±0.5% reference voltage accuracy at 25°C maintains regulation precision through harsh thermal cycling found in engine-bay and ADAS modules.
Can the TL431AIDG4 replace a fixed zener diode in a shunt regulator circuit?
Yes, the TL431AIDG4 directly replaces fixed zener diodes with superior accuracy and adjustability. A zener typically has ±5% tolerance, whereas the TL431AIDG4 holds ±0.5% reference accuracy and sinks up to 100mA, providing tighter regulation over a much wider programmable voltage range from 2.495V to 36V.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.1998 | $0.20 |
| 26+ | $0.1665 | $4.33 |
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