Overview
The TL431AQDBZRG4 is a precision programmable shunt voltage reference produced by Texas Instruments. This three-terminal adjustable shunt regulator is known for its thermal stability over a wide temperature range, making it suitable for various automotive, commercial, and military applications. The device allows for adjustable output voltage between the reference voltage (approximately 2.5V) and 36V, set using two external resistors. It features active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage (Vref) | 2.495 | V |
| Reference Voltage Tolerance at 25°C | 1% | - |
| Adjustable Output Voltage Range | 2.495V to 36V | V |
| Operating Temperature Range | -40°C to 125°C | °C |
| Typical Output Impedance | 0.2Ω | Ω |
| Sink-Current Capability | 1mA to 100mA | mA |
| Package Type | SOT-23 (DBZ) | - |
| Pins | 3 | - |
Key Features
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- Reference voltage tolerance at 25°C: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
- Operation from -40°C to 125°C.
- Typical temperature drift: 6mV (C temp), 14mV (I temp, Q temp).
- Low output noise.
- Typical output impedance of 0.2Ω.
- Sink-current capability: 1mA to 100mA.
Applications
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Rack server power.
- Industrial AC/DC.
- AC inverter & VF drives.
- Servo drive control modules.
- Notebook PC power adapter designs.
Q & A
- Q: What is the typical output voltage of the TL431AQDBZRG4?
A: The TL431AQDBZRG4 provides a typical output voltage of 2.495V, which can be adjusted as per the application's requirements using external resistors.
- Q: What are the typical applications of the TL431AQDBZRG4?
A: The TL431AQDBZRG4 is commonly used in precision voltage regulation, battery management systems, and switching power supplies to provide stable and accurate reference voltages.
- Q: What is the operating temperature range of the TL431AQDBZRG4?
A: The TL431AQDBZRG4 operates from -40°C to 125°C.
- Q: What is the typical output impedance of the TL431AQDBZRG4?
A: The typical output impedance is 0.2Ω.
- Q: What is the sink-current capability of the TL431AQDBZRG4?
A: The sink-current capability ranges from 1mA to 100mA.
- Q: Can the TL431AQDBZRG4 replace Zener diodes in many applications?
A: Yes, the TL431AQDBZRG4 can replace Zener diodes due to its sharp turn-on characteristic and active output circuitry.
- Q: What package type is the TL431AQDBZRG4 available in?
A: The TL431AQDBZRG4 is available in the SOT-23 (DBZ) package.
- Q: How many pins does the TL431AQDBZRG4 have?
A: The TL431AQDBZRG4 has 3 pins.
- Q: What are the different grades of the TL431AQDBZRG4 based on reference voltage tolerance?
A: The TL431AQDBZRG4 is available in B grade (0.5%), A grade (1%), and Standard grade (2%) based on reference voltage tolerance at 25°C.
- Q: What is the typical temperature drift of the TL431AQDBZRG4?
A: The typical temperature drift is 6mV (C temp) and 14mV (I temp, Q temp).
