Overview
The TL431AIDBZR is an adjustable precision shunt regulator produced by Texas Instruments. This component belongs to the three-terminal shunt regulator family and is designed to provide a precise DC voltage output, adjustable up to 36 V, using two external resistors. It is particularly useful in applications requiring stable voltage references, even in the presence of large power supply variations.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | SOT-23 |
| Reference Type | Adjustable |
| Initial Accuracy | ±1.0% |
| Mounting Type | Surface Mount |
| Topology | Shunt |
| Maximum Output Current | 100 mA |
| Maximum Input Voltage | 37 V |
| Minimum Output Voltage | 2.5 V |
| Maximum Output Voltage | 36 V |
| Pin Count | 3 |
| Dimensions | 2.92 x 1.3 x 1 mm |
| Minimum Operating Temperature | -40 °C |
| Maximum Operating Temperature | 85 °C |
| Temperature Coefficient | 34 ppm/°C (Typ) |
| Output Impedance | 0.2 Ω (Typ) |
Key Features
Programmable Output Voltage: The output voltage can be adjusted up to 36 V using two external resistors.
High Accuracy: Available in different grades with initial accuracy of ±1.0%, ±0.5%, and ±2.0%.
Low Output Noise: Ensures stable voltage output with minimal noise.
Wide Operating Temperature Range: Operates from -40 °C to 85 °C.
AEC-Q100 Qualified: Grade 1 qualification makes it suitable for automotive applications.
Low Dynamic Impedance: Typical output impedance of 0.2 Ω.
Applications
Shunt Regulator: Used in applications requiring a stable voltage reference.
Precision Current Limiter: Can be configured as a precision current limiter.
Precision Constant Current Sink: Ideal for applications needing a constant current sink.
Isolated Feedback Loop for Switch Mode Power Supply (SMPS): Enhances stability and EMI ruggedness in SMPS applications.
Q & A
- What is the TL431AIDBZR used for?
The TL431AIDBZR is used as an adjustable precision shunt regulator to provide a stable DC voltage output.
- What is the adjustable voltage range of the TL431AIDBZR?
The output voltage can be adjusted from 2.495 V to 36 V using two external resistors.
- What is the maximum output current of the TL431AIDBZR?
The maximum output current is 100 mA.
- What is the operating temperature range of the TL431AIDBZR?
The component operates from -40 °C to 85 °C.
- Is the TL431AIDBZR suitable for automotive applications?
Yes, it is AEC-Q100 qualified (Grade 1), making it suitable for automotive applications.
- What is the typical output impedance of the TL431AIDBZR?
The typical output impedance is 0.2 Ω.
- What package type does the TL431AIDBZR come in?
The TL431AIDBZR comes in a SOT-23 package.
- Can the TL431AIDBZR be used in SMPS applications?
Yes, it is suitable for SMPS applications due to its enhanced stability and EMI ruggedness.
- What are the dimensions of the TL431AIDBZR?
The dimensions are 2.92 x 1.3 x 1 mm.
- What is the maximum input voltage for the TL431AIDBZR?
The maximum input voltage is 37 V.
