Overview
The TL431BIDBZR is a three-terminal adjustable precision shunt regulator, part of the TL431 family. This device is characterized by its ability to set the output voltage between a reference voltage (approximately 2.495 V) and 36 V using two external resistors. It is available from manufacturers such as Nexperia and is similar in functionality to the TL431 devices from Texas Instruments.
The TL431BIDBZR offers high thermal stability over a wide temperature range, making it suitable for various applications including automotive, commercial, and military environments.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Reference Voltage Tolerance (at 25°C) | 0.5% (B Grade) | |
| Adjustable Output Voltage | Vref to 36 V | Set by two external resistors |
| Temperature Range | -40°C to 125°C | For Q-grade devices |
| Typical Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | |
| Output Impedance | 0.2 Ω (typical) | |
| Sink-Current Capability | 1 mA to 100 mA | |
| Package | SOT23 | |
| AEC-Q100 Qualification | Grade 1 |
Key Features
- Adjustable Output Voltage: The output voltage can be set between Vref (approximately 2.495 V) and 36 V using two external resistors.
- Low Output Noise: The device features low output noise, making it suitable for applications requiring stable voltage regulation.
- Sharp Turn-On Characteristic: Active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- High Thermal Stability: The device is characterized for operation over a wide temperature range, ensuring good stability over the entire temperature range.
- Low Output Impedance: Typical output impedance of 0.2 Ω.
- Sink-Current Capability: The device can sink current from 1 mA to 100 mA.
Applications
- On-Board Regulation: Suitable for on-board voltage regulation due to its adjustable output voltage and high thermal stability.
- Adjustable Power Supplies: Used in adjustable power supplies where precise voltage regulation is required.
- Switching Power Supplies: Can be used in switching power supplies, especially with isolated feedback loops.
- Precision Current Limiter and Constant Current Sink: Functions as a precision current limiter and constant current sink due to its adjustable output and stable operation.
- Automotive, Commercial, and Military Applications: AEC-Q100 qualified, making it suitable for automotive and other demanding environments.
Q & A
- What is the adjustable output voltage range of the TL431BIDBZR?
The output voltage can be set between Vref (approximately 2.495 V) and 36 V using two external resistors.
- What are the temperature ranges for the TL431BIDBZR?
The device is characterized for operation from -40°C to 125°C for Q-grade devices.
- What is the typical output impedance of the TL431BIDBZR?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431BIDBZR?
The device can sink current from 1 mA to 100 mA.
- Is the TL431BIDBZR AEC-Q100 qualified?
- What package is the TL431BIDBZR available in?
The TL431BIDBZR is available in the SOT23 package.
- What are some common applications of the TL431BIDBZR?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and precision current limiters.
- How does the TL431BIDBZR compare to Zener diodes?
The TL431BIDBZR has a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What is the reference voltage tolerance of the TL431BIDBZR?
The reference voltage tolerance is 0.5% for the B grade.
- Does the TL431BIDBZR have low output noise?
