Overview
The TLVH431BQDBZRG4 is a precision adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 family, known for its high accuracy and stability. This device is designed to provide a programmable output voltage, making it versatile for various applications. The TLVH431BQDBZRG4 operates over a wide temperature range from -40°C to 125°C, ensuring reliability in diverse environmental conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade) | % |
| Adjustable Output Voltage | Vref to 36V | V |
| Operating Temperature Range | -40°C to 125°C | °C |
| Typical Temperature Drift | 6 mV (C Temp), 14 mV (I Temp, Q Temp) | mV |
| Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | SOT-23 (DBZ) | - |
| Pins | 3 | - |
Key Features
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Programmable output voltage up to 36V using two external resistors.
- Low output noise and high stability over the entire temperature range.
- Low output impedance of 0.2 Ω.
- Sink-current capability ranging from 1 mA to 100 mA.
- Available in three grades with different reference voltage tolerances: 0.5% (B Grade), 1% (A Grade), and 2% (Standard Grade).
Applications
- On-board voltage regulation.
- Adjustable power supplies.
- Switching power supplies.
- Voltage and current referencing.
- Automotive, commercial, and military applications due to its specified thermal stability over a wide temperature range.
Q & A
- What is the TLVH431BQDBZRG4 used for?
The TLVH431BQDBZRG4 is used as a precision adjustable shunt regulator, often replacing Zener diodes in applications such as on-board regulation, adjustable power supplies, and switching power supplies.
- What is the adjustable output voltage range of the TLVH431BQDBZRG4?
The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What are the different grades of the TL431 family?
The TL431 family is available in three grades: B Grade with a 0.5% tolerance, A Grade with a 1% tolerance, and Standard Grade with a 2% tolerance at 25°C.
- What is the operating temperature range of the TLVH431BQDBZRG4?
The device operates from -40°C to 125°C.
- What is the typical output impedance of the TLVH431BQDBZRG4?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TLVH431BQDBZRG4?
The sink-current capability ranges from 1 mA to 100 mA.
- What package type is the TLVH431BQDBZRG4 available in?
The device is available in the SOT-23 (DBZ) package with 3 pins.
- Why is the TLVH431BQDBZRG4 preferred over Zener diodes in some applications?
It is preferred due to its active output circuitry, which provides a very sharp turn-on characteristic and better stability.
- What are some common applications of the TLVH431BQDBZRG4?
Common applications include on-board voltage regulation, adjustable power supplies, switching power supplies, and voltage and current referencing.
- Is the TLVH431BQDBZRG4 suitable for automotive applications?
Yes, it is suitable for automotive, commercial, and military applications due to its specified thermal stability over a wide temperature range.
