Overview
The TL431BQDBZRG4 is an adjustable precision shunt regulator produced by Texas Instruments. This three-terminal device is part of the TL431 family, known for its thermal stability and adjustable output voltage. It is widely used in various applications requiring precise voltage regulation.
Key Specifications
| Parameter | Value |
|---|---|
| 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 |
| Operating Temperature Range | −40°C to 125°C |
| 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 |
Key Features
- Adjustable output voltage set by two external resistors
- Low output noise and sharp turn-on characteristic
- Low output impedance of 0.2 Ω
- Sink-current capability from 1 mA to 100 mA
- AEC-Q100 qualified (grade 1) for automotive applications
Applications
- On-board regulation
- Adjustable power supplies
- Switching power supplies
- Precision current limiter and constant current sink
- Isolated feedback loop for Switch Mode Power Supply (SMPS)
Q & A
- What is the adjustable output voltage range of the TL431BQDBZRG4?
The adjustable output voltage range is from Vref (approximately 2.5V) to 36V, set by two external resistors. - What are the reference voltage tolerances available for the TL431BQDBZRG4?
The reference voltage tolerances are 0.5% (B grade), 1% (A grade), and 2% (Standard grade). - What is the operating temperature range of the TL431BQDBZRG4?
The operating temperature range is from −40°C to 125°C. - What is the typical output impedance of the TL431BQDBZRG4?
The typical output impedance is 0.2 Ω. - What is the sink-current capability of the TL431BQDBZRG4?
The sink-current capability is from 1 mA to 100 mA. - Is the TL431BQDBZRG4 AEC-Q100 qualified?
Yes, the TL431BQDBZRG4 is AEC-Q100 qualified (grade 1) for automotive applications. - What package type is the TL431BQDBZRG4 available in?
The TL431BQDBZRG4 is available in the SOT23 package. - What are some common applications of the TL431BQDBZRG4?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, precision current limiter, and constant current sink. - How does the TL431BQDBZRG4 compare to Zener diodes?
The TL431BQDBZRG4 has a sharper turn-on characteristic and lower output noise compared to Zener diodes, making it an excellent replacement in many applications. - Are there any specific design tools available for the TL431BQDBZRG4?
Yes, there are design calculators and SPICE models available for the TL431 family, including the TL431CALC spreadsheet and PSpice models.
