Overview
The TL431BCDBZRG4 is an adjustable precision shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its high accuracy and stability over a wide temperature range. It is a three-terminal regulator that can be programmed to output a voltage between approximately 2.5V and 36V using two external resistors. This makes it highly versatile for various applications, including on-board regulation, adjustable power supplies, and switching power supplies. The TL431BCDBZRG4 is particularly noted for its low output noise, sharp turn-on characteristic, and ability to replace Zener diodes in many circuits.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Product Category | Voltage References |
| Package / Case | SOT-23-3 |
| Reference Type | Shunt Adjustable Precision References |
| Output Voltage | Adjustable (2.495V to 36V) |
| Initial Accuracy | 0.5% |
| Temperature Coefficient | 92 PPM / °C |
| Series VREF - Input Voltage - Max | 37 V |
| Shunt Current - Min | 600 uA |
| Shunt Current - Max | 100 mA |
| Minimum Operating Temperature | -40 °C |
| Maximum Operating Temperature | +125 °C |
| Output Impedance | 0.2Ω (Typical) |
| Mounting Style | SMD/SMT |
| RoHS | Yes |
Key Features
- Adjustable output voltage from approximately 2.5V to 36V using two external resistors.
- High accuracy with initial tolerance of 0.5% at 25°C (B grade).
- Low output noise and sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Operation over a wide temperature range from -40°C to 125°C.
- Typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- Low output drift versus temperature, ensuring good stability over the entire temperature range.
Applications
- On-board regulation and voltage monitoring.
- Adjustable power supplies and switching power supplies.
- Secondary side regulation in flyback SMPSs.
- Zener diode replacement in various circuits.
- Comparator with integrated reference.
Q & A
- What is the TL431BCDBZRG4 used for?
The TL431BCDBZRG4 is used as an adjustable precision shunt regulator in various applications such as on-board regulation, adjustable power supplies, and switching power supplies.
- What is the output voltage range of the TL431BCDBZRG4?
The output voltage can be adjusted between approximately 2.5V and 36V using two external resistors.
- What is the initial accuracy of the TL431BCDBZRG4?
The initial accuracy of the TL431BCDBZRG4 is 0.5% at 25°C (B grade).
- What is the operating temperature range of the TL431BCDBZRG4?
The device operates from -40°C to 125°C.
- What is the typical output impedance of the TL431BCDBZRG4?
The typical output impedance is 0.2Ω.
- Can the TL431BCDBZRG4 replace Zener diodes?
Yes, the TL431BCDBZRG4 can replace Zener diodes in many applications due to its sharp turn-on characteristic and low output noise.
- What is the minimum and maximum shunt current of the TL431BCDBZRG4?
The minimum shunt current is 600 uA, and the maximum shunt current is 100 mA.
- Is the TL431BCDBZRG4 RoHS compliant?
Yes, the TL431BCDBZRG4 is RoHS compliant.
- What package type does the TL431BCDBZRG4 come in?
The TL431BCDBZRG4 comes in a SOT-23-3 package.
- What are some common applications of the TL431BCDBZRG4?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, and secondary side regulation in flyback SMPSs.
