Overview
The TL431AQDBVTE4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its precision and thermal stability over a wide range of temperatures. It is designed to provide a stable reference voltage and can be used in various applications requiring adjustable voltage regulation.
The TL431AQDBVTE4 offers high accuracy and stability, making it an excellent choice for replacing Zener diodes in many circuits. It features an adjustable output voltage that can be set between the reference voltage (approximately 2.5V) and 36V using two external resistors.
Key Specifications
| Characteristic | 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 | 0.2Ω (typical) | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | SOT-23-5 (DBV) | - |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between the reference voltage (approximately 2.5V) and 36V using two external resistors.
- High Accuracy: Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- Low Output Noise: Ensures stable operation in noise-sensitive applications.
- Low Output Impedance: Typical output impedance of 0.2Ω.
- Sink-Current Capability: Can sink currents from 1 mA to 100 mA.
- Wide Operating Temperature Range: Operates from −40°C to 125°C, making it suitable for various environmental conditions.
- Sharp Turn-On Characteristic: Active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
Applications
- Rack Server Power: Used in power supply units for rack servers due to its high accuracy and stability.
- Industrial AC/DC: Suitable for industrial power supplies and AC/DC converters.
- AC Inverter & VF Drives: Used in inverter and variable frequency drive applications.
- Servo Drive Control Module: Employed in servo drive control modules for precise voltage regulation.
- Notebook PC Power Adapter Design: Used in power adapter designs for notebook PCs to ensure stable and efficient power supply.
Q & A
- What is the TL431AQDBVTE4?
The TL431AQDBVTE4 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431AQDBVTE4?
The output voltage can be set to any value between the reference voltage (approximately 2.5V) and 36V using two external resistors.
- What are the temperature tolerance grades available for the TL431AQDBVTE4?
The device is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- What is the typical output impedance of the TL431AQDBVTE4?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431AQDBVTE4?
The device can sink currents from 1 mA to 100 mA.
- What is the operating temperature range of the TL431AQDBVTE4?
The device operates from −40°C to 125°C.
- What are some common applications of the TL431AQDBVTE4?
Common applications include rack server power, industrial AC/DC, AC inverter & VF drives, servo drive control modules, and notebook PC power adapter designs.
- Why is the TL431AQDBVTE4 a good replacement for Zener diodes?
It provides a very sharp turn-on characteristic and active output circuitry, making it an excellent replacement for Zener diodes in many applications.
- What package type is the TL431AQDBVTE4 available in?
The device is available in the SOT-23-5 (DBV) package type.
- How does the TL431AQDBVTE4 ensure low output noise?
The device is designed to ensure stable operation with low output noise, making it suitable for noise-sensitive applications.
- What is the typical temperature drift of the TL431AQDBVTE4?
The typical temperature drift is 6 mV (C temp) and 14 mV (I temp, Q temp).
