Overview
The TL431QDBVTG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 and TL432 series, known for their specified thermal stability over a wide range of temperatures, including automotive, commercial, and military environments. The device allows for adjustable output voltage settings between approximately 2.5V and 36V using two external resistors. This makes it an excellent replacement for Zener diodes in various applications, including on-board regulation, adjustable power supplies, and switching power supplies.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage (Vref) | 2440 | 2495 | 2550 | mV |
| Reference Voltage Tolerance at 25°C | - | - | - | 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade) |
| Operating Temperature Range | -40 | - | 125 | °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 | - | 100 mA | mA |
| Package Type | - | SOT-23 (DBV) | - | - |
| Package Quantity | - | 250 (Carrier) | - | - |
Key Features
- Adjustable output voltage from approximately 2.5V to 36V using two external resistors.
- Specified thermal stability over a wide temperature range (-40°C to 125°C).
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability from 1 mA to 100 mA.
- Available in three grades with different initial tolerances (0.5%, 1%, and 2%).
- Active output circuitry with a sharp turn-on characteristic, making it a good replacement for Zener diodes.
Applications
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Automotive, commercial, and military applications due to its wide temperature range and thermal stability.
Q & A
- What is the TL431QDBVTG4? The TL431QDBVTG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431QDBVTG4? The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the operating temperature ranges for the TL431QDBVTG4? The device operates from -40°C to 125°C.
- What are the different grades of the TL431 series? The TL431 series is available in three grades with initial tolerances of 0.5% (B Grade), 1% (A Grade), and 2% (Standard Grade).
- What is the typical output impedance of the TL431QDBVTG4? The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431QDBVTG4? The sink-current capability ranges from 1 mA to 100 mA.
- What are some common applications of the TL431QDBVTG4? Common applications include on-board regulation, adjustable power supplies, and switching power supplies.
- Why is the TL431QDBVTG4 a good replacement for Zener diodes? It has active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What package type is the TL431QDBVTG4 available in? The TL431QDBVTG4 is available in the SOT-23 (DBV) package type.
- How many units are typically included in a carrier package? A carrier package typically includes 250 units.
