Overview
The TLVH431BQDBVRQ1 is a low-voltage, 3-terminal adjustable voltage reference produced by Texas Instruments. This device is designed for automotive applications and offers thermal stability over a wide temperature range of –40°C to 125°C. It is part of the TLVH431 family, which operates from a lower voltage than traditional shunt-regulator references like the TL431 and TL1431. The TLVH431BQDBVRQ1 is packaged in a SOT-23 (DBV) package with 5 pins.
Key Specifications
| Parameter | Description |
|---|---|
| Package | SOT-23 (DBV), 5 pins |
| Operating Temperature Range | –40°C to 125°C |
| Reference Voltage Tolerance at 25°C | 0.5% (B Grade), 1% (A Grade) |
| Adjustable Output Voltage | VREF (1.24 V) to 18 V |
| Cathode Current Range | 100 µA to 70 mA |
| Typical Output Impedance | 0.25 Ω |
| Low-Voltage Operation | Down to 1.24 V |
Key Features
- Qualified for automotive applications with AEC-Q100 compliance.
- Low-voltage operation down to 1.24 V.
- Adjustable output voltage from VREF (1.24 V) to 18 V using two external resistors.
- Wide operating cathode current range: 100 µA to 70 mA.
- Typical output impedance of 0.25 Ω.
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for low-voltage Zener diodes.
- Thermal stability specified over the automotive temperature range.
Applications
- On-board regulation and adjustable power supplies.
- Isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies when used with an optocoupler.
- Automotive LED lighting and other automotive applications requiring precise voltage regulation.
- Replacement for low-voltage Zener diodes in various electronic circuits.
Q & A
- What is the operating temperature range of the TLVH431BQDBVRQ1?
The operating temperature range is –40°C to 125°C.
- What is the reference voltage tolerance at 25°C for the TLVH431BQDBVRQ1?
The reference voltage tolerance is 0.5% for B Grade and 1% for A Grade.
- How is the output voltage of the TLVH431BQDBVRQ1 adjusted?
The output voltage can be adjusted from VREF (1.24 V) to 18 V using two external resistors.
- What is the typical output impedance of the TLVH431BQDBVRQ1?
The typical output impedance is 0.25 Ω.
- What is the minimum operating voltage of the TLVH431BQDBVRQ1?
The device operates down to 1.24 V.
- What are some common applications of the TLVH431BQDBVRQ1?
Common applications include on-board regulation, adjustable power supplies, and isolated feedback circuits for switching-mode power supplies.
- Is the TLVH431BQDBVRQ1 qualified for automotive applications?
Yes, it is qualified for automotive applications and complies with AEC-Q100 standards.
- What is the package type and pin count of the TLVH431BQDBVRQ1?
The device is packaged in a SOT-23 (DBV) package with 5 pins.
- What is the cathode current range of the TLVH431BQDBVRQ1?
The cathode current range is from 100 µA to 70 mA.
- How does the TLVH431BQDBVRQ1 compare to traditional shunt-regulator references?
The TLVH431BQDBVRQ1 operates from a lower voltage and offers better thermal stability and lower output impedance compared to traditional references like the TL431 and TL1431.
