Overview
The TL431CDBVR is an adjustable precision shunt regulator produced by Texas Instruments. This three-terminal device is known for its high thermal stability and is suitable for various applications, including on-board regulation, adjustable power supplies, and switching power supplies. It offers a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many scenarios. The TL431CDBVR can operate over a wide temperature range and is available in different grades with varying initial tolerances.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SC-74A, SOT-753 |
| Number of Pins | 5 |
| Operating Temperature Range | 0°C to 70°C (C grade), –40°C to 85°C (I grade), –40°C to 125°C (Q grade) |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) |
| Adjustable Output Voltage | Vref (approximately 2.5V) to 36V |
| Typical Output Impedance | 0.2Ω |
| Sink-Current Capability | 1mA to 100mA |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) |
Key Features
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- High thermal stability over a wide temperature range.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Replacement for Zener diodes in various applications.
- Automotive, commercial, and military temperature ranges.
Q & A
- What is the TL431CDBVR used for?
The TL431CDBVR is used as an adjustable precision shunt regulator in applications such as on-board regulation, adjustable power supplies, and switching power supplies.
- What is the adjustable output voltage range of the TL431CDBVR?
The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What are the different temperature grades available for the TL431CDBVR?
The device is available in C, I, and Q temperature grades, operating from 0°C to 70°C, –40°C to 85°C, and –40°C to 125°C respectively.
- What is the typical output impedance of the TL431CDBVR?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431CDBVR?
The sink-current capability ranges from 1mA to 100mA.
- How does the TL431CDBVR compare to Zener diodes?
The TL431CDBVR has a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What are the initial tolerance grades available for the TL431CDBVR?
The device is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- What is the typical temperature drift of the TL431CDBVR?
The typical temperature drift is 6mV for C temp and 14mV for I and Q temps.
- How does the TL431CDBVR handle noise?
The device has low output noise.
- What package types are available for the TL431CDBVR?
The device is available in SC-74A and SOT-753 packages.
