Overview
The TL431AIDBVR is a precision programmable reference voltage regulator produced by Texas Instruments. This three-terminal adjustable shunt regulator is designed to provide a stable and precise DC voltage output, making it an excellent choice for various power management and voltage regulation applications. The device operates over a wide temperature range and offers high thermal stability, making it suitable for automotive, commercial, and military environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Adjustable Output Voltage | 2.495 to 36 V | V |
| Operating Temperature Range | -40°C to 85°C | °C |
| Typical Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Typical Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Cathode Voltage (VKA) | 37 V | V |
| Reference Input Current (Iref) | -0.05 to 10 mA | mA |
| Operating Junction Temperature Range | -40°C to 125°C | °C |
Key Features
- Precision programmable reference voltage with adjustable output from 2.495 V to 36 V using two external resistors.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability ranging from 1 mA to 100 mA.
- High thermal stability with specified operation over automotive, commercial, and military temperature ranges.
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
- Rack server power supplies.
- Industrial AC/DC power supplies.
- AC inverter and variable frequency (VF) drives.
- Servo drive control modules.
- Notebook PC power adapter designs.
- On-board regulation, adjustable power supplies, and switching power supplies.
Q & A
- What is the adjustable output voltage range of the TL431AIDBVR?
The adjustable output voltage range is from 2.495 V to 36 V.
- What are the operating temperature ranges for the TL431AIDBVR?
The device operates from -40°C to 85°C, with some versions characterized for operation up to 125°C.
- What is the typical output impedance of the TL431AIDBVR?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431AIDBVR?
The sink-current capability ranges from 1 mA to 100 mA.
- Can the TL431AIDBVR replace Zener diodes in some applications?
- What are the different grades of the TL431AIDBVR based on initial tolerance?
The device is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- What is the maximum cathode voltage (VKA) for the TL431AIDBVR?
The maximum cathode voltage is 37 V.
- What is the reference input current range for the TL431AIDBVR?
The reference input current range is from -0.05 mA to 10 mA.
- What are some common applications of the TL431AIDBVR?
Common applications include rack server power supplies, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter designs.
- How is the output voltage of the TL431AIDBVR adjusted?
The output voltage can be adjusted using two external resistors.
