Overview
The TL431BQDBZTG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its high precision and adjustable output voltage. The TL431BQDBZTG4 is designed to operate over a wide temperature range, making it suitable for various applications including automotive, commercial, and military environments.
The device allows for the output voltage to be set to any value between approximately 2.5V and 36V using two external resistors. This flexibility, combined with its low output noise and sharp turn-on characteristic, makes it an excellent replacement for Zener diodes in many circuits.
Key Specifications
| Attribute | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | TL431BQDBZTG4 |
| Package | SOT-23 (DBZ) |
| Number of Pins | 3 |
| Mounting Type | Surface Mount |
| Max Output Current | 100mA |
| Min Input Voltage | 2.495V |
| Max Input Voltage | 37V |
| Max Output Voltage | 36V |
| Reference Voltage Tolerance | 0.5% (B grade) |
| Temperature Coefficient | 34ppm/°C |
| Cathode Current | 700µA |
| Operating Temperature Range | -40°C to 125°C |
| Output Impedance | 0.2Ω (typical) |
| RoHS Compliance | Yes |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- High Precision: Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- Low Output Noise: Suitable for applications requiring minimal noise.
- Sharp Turn-On Characteristic: Makes it an excellent replacement for Zener diodes in many applications.
- Wide Operating Temperature Range: Operates from -40°C to 125°C, making it suitable for automotive, commercial, and military environments.
- Low Output Impedance: Typical output impedance of 0.2Ω.
- Sink-Current Capability: Can sink currents from 1mA to 100mA.
Applications
- On-Board Regulation: Used in various board-level voltage regulation applications.
- Adjustable Power Supplies: Ideal for power supplies where the output voltage needs to be adjustable.
- Switching Power Supplies: Used in switching power supplies due to its low output noise and sharp turn-on characteristic.
- Automotive Systems: Suitable for automotive applications due to its wide operating temperature range.
- Military and Commercial Systems: Used in military and commercial systems requiring high precision and reliability.
Q & A
- What is the TL431BQDBZTG4 used for?
The TL431BQDBZTG4 is a three-terminal adjustable shunt regulator used for voltage regulation in various applications, including on-board regulation, adjustable power supplies, and switching power supplies.
- What is the adjustable output voltage range of the TL431BQDBZTG4?
The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the different grades of the TL431 series?
The TL431 series is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- What is the operating temperature range of the TL431BQDBZTG4?
The device operates from -40°C to 125°C.
- What is the typical output impedance of the TL431BQDBZTG4?
The typical output impedance is 0.2Ω.
- Is the TL431BQDBZTG4 RoHS compliant?
Yes, the TL431BQDBZTG4 is RoHS compliant.
- What is the maximum output current of the TL431BQDBZTG4?
The maximum output current is 100mA.
- What is the cathode current of the TL431BQDBZTG4?
The cathode current is 700µA.
- Can the TL431BQDBZTG4 replace Zener diodes in some applications?
Yes, the TL431BQDBZTG4 can replace Zener diodes in many applications due to its sharp turn-on characteristic and low output noise.
- What is the packaging type of the TL431BQDBZTG4?
The device is packaged in a SOT-23 (DBZ) package.
