Overview
The TL431LIAEDBZRQ1 is a three-terminal adjustable precision shunt regulator produced by Texas Instruments. This device is specifically designed for automotive applications and is AEC-Q100 qualified, ensuring it meets stringent automotive standards. It offers high thermal stability over a wide temperature range of –40°C to 125°C for grade 1 and –40°C to 150°C for grade 0. The TL431LIAEDBZRQ1 is an excellent replacement for Zener diodes in various applications, including onboard regulation, adjustable power supplies, and switching power supplies, due to its sharp turn-on characteristic and low output impedance.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (DBZ) |
| Pins | 3 |
| Operating Temperature Range (°C) | –40 to 125 (Grade 1), –40 to 150 (Grade 0) |
| Reference Voltage Tolerance at 25°C | 0.5% (B Grade), 1% (A Grade) |
| Minimum Typical Output Voltage | 2.495 V |
| Adjustable Output Voltage Range | VREF to 36 V |
| Maximum Temperature Drift | 27 mV (Grade 1), 34 mV (Grade 0) |
| Typical Output Impedance | 0.3 Ω |
| Sink-Current Capability | 0.6 mA to 15 mA |
| Reference Input Current (IREF) | 0.4 µA (max) |
Key Features
- Qualified for automotive applications with AEC-Q100 certification.
- Wide operating temperature range: –40°C to 125°C (Grade 1) and –40°C to 150°C (Grade 0).
- High reference voltage stability with tolerances of 0.5% and 1% at 25°C.
- Low output impedance of 0.3 Ω.
- Sink-current capability from 0.6 mA to 15 mA.
- Low reference input current (IREF) of 0.4 µA (max).
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
Applications
- Onboard voltage regulation.
- Adjustable power supplies.
- Switching power supplies.
- Automotive electronics requiring high thermal stability and precision voltage regulation.
Q & A
- What is the TL431LIAEDBZRQ1 used for?
The TL431LIAEDBZRQ1 is used as an adjustable precision shunt regulator in various applications, including onboard regulation, adjustable power supplies, and switching power supplies.
- What are the operating temperature ranges for the TL431LIAEDBZRQ1?
The device operates from –40°C to 125°C for Grade 1 and –40°C to 150°C for Grade 0.
- What is the reference voltage tolerance at 25°C for the TL431LIAEDBZRQ1?
The reference voltage tolerance is 0.5% for B Grade and 1% for A Grade at 25°C.
- What is the adjustable output voltage range of the TL431LIAEDBZRQ1?
The output voltage can be set to any value between VREF (approximately 2.495 V) and 36 V using two external resistors.
- What is the typical output impedance of the TL431LIAEDBZRQ1?
The typical output impedance is 0.3 Ω.
- What is the sink-current capability of the TL431LIAEDBZRQ1?
The sink-current capability ranges from 0.6 mA to 15 mA.
- What is the maximum reference input current (IREF) for the TL431LIAEDBZRQ1?
The maximum reference input current is 0.4 µA.
- Is the TL431LIAEDBZRQ1 AEC-Q100 qualified?
- What are the advantages of using the TL431LIAEDBZRQ1 over Zener diodes?
The TL431LIAEDBZRQ1 offers a sharp turn-on characteristic, lower output impedance, and better thermal stability compared to Zener diodes.
- Are there any pin-to-pin alternatives to the TL431LIAEDBZRQ1?
