Texas Instruments TL431AQDBZRQ1
| Parameters | |
|---|---|
| Temperature Coefficient | - |
| Current - Output | 100 mA |
| Supplier Device Package | SOT-23-3 |
| Reference Type | Shunt |
| Current - Cathode | 700 µA |
| Voltage - Output (Min/Fixed) | 2.495V |
| Noise - 0.1Hz to 10Hz | - |
| Noise - 10Hz to 10kHz | - |
| Voltage - Output (Max) | 36 V |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | TL431 |
| REACH Status | REACH Unaffected |
| Standard Package | 3,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
| Series | Automotive, AEC-Q100 |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | TO-236-3, SC-59, SOT-23-3 |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Current - Supply | - |
| Output Type | Adjustable |
| Voltage - Input | - |
| Tolerance | ±1% |
TL431AQDBZRQ1 shunt regulator IC
The TL431AQDBZRQ1 from Texas Instruments is an automotive-grade, programmable precision shunt regulator IC designed for high-reliability voltage reference and feedback control applications in harsh automotive environments. This advanced three-terminal adjustable regulator operates from a wide cathode voltage range of 2.5V to 36V with a reference voltage accuracy of ±0.5% at 25°C, making it ideal for switching power supplies, battery management systems, and over-voltage protection circuits in automotive electronics.
The shunt regulator features programmable output voltage adjustment from 2.5V to 36V using two external resistors, with a typical dynamic impedance of 0.2Ω and a low operating current of 400 μA, providing excellent stability and temperature performance across the automotive temperature range of -40°C to +125°C. The TL431AQDBZRQ1's AEC-Q100 Grade 1 qualification, combined with its 1.5% reference voltage tolerance over the full temperature range and 100 mA sink current capability, makes it particularly suitable for automotive body control modules, infotainment systems, ADAS, and engine control units where reliable voltage regulation is critical for system performance and safety.
Alternative Programmable Voltage Reference Recommendations
● NCP431SNT1G (ON Semiconductor): A programmable shunt regulator with 0.5% reference accuracy and 100 mA sink capability in SOT-23 package for general automotive applications.
● AS431AJSTR-G1 (Diodes Incorporated): An automotive-grade shunt regulator with 1% accuracy and low operating current of 60 μA typical.
● TS431ACX RFG (STMicroelectronics): A precision programmable reference with 0.5% tolerance and wide operating temperature range for industrial and automotive use.
● REF3033AIDBZR (Texas Instruments): A fixed 3.3V voltage reference with 0.1% initial accuracy and 50 ppm/°C drift for applications requiring fixed reference voltages.
