Overview
The TL431BQDBZR is a three-terminal adjustable precision shunt regulator produced by Texas Instruments. This device is part of the TL431 family, known for its high accuracy and stability. It is designed to provide an adjustable output voltage range from approximately 2.495V to 36V, set by two external resistors. The TL431BQDBZR is widely used in various applications requiring precise voltage regulation, such as on-board regulation, adjustable power supplies, and switching power supplies.
Key Specifications
| Attribute | Value |
|---|---|
| Case/Package | SOT-23 (TO-236AB) |
| Number of Pins | 3 |
| Mount | Surface Mount |
| Max Output Current | 100mA |
| Min Input Voltage | 2.495V |
| Max Input Voltage | 37V |
| Max Output Voltage | 36V |
| Tolerance | 0.5% (B grade) |
| Temperature Coefficient | 34ppm/°C |
| Cathode Current | 700µA |
| Lifecycle Status | Production |
| Max Operating Temperature | 125°C |
| Min Operating Temperature | -40°C |
| Number of Channels | 1 |
| Output Current | 100mA |
| Output Voltage | 2.5V (adjustable up to 36V) |
| Packaging | Tape & Reel |
| Reference Type | Adjustable |
| Reference Voltage | 36V |
| RoHS | Compliant |
Key Features
- Programmable output voltage up to 36V using two external resistors.
- Three different reference voltage tolerances: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
- Typical temperature drift of 6mV (from 0°C to 70°C).
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- AEC-Q100 qualified (grade 1) for automotive applications.
- Low output drift versus temperature ensures good stability over the entire temperature range.
Applications
- Shunt regulator.
- Precision current limiter.
- Precision constant current sink.
- Isolated feedback loop for Switch Mode Power Supplies (SMPS).
- On-board regulation and adjustable power supplies.
Q & A
- What is the TL431BQDBZR? The TL431BQDBZR is a three-terminal adjustable precision shunt regulator from Texas Instruments.
- What is the output voltage range of the TL431BQDBZR? The output voltage can be set to any value between approximately 2.495V and 36V using two external resistors.
- What are the different tolerance grades available for the TL431BQDBZR? The device is available in three tolerance grades: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
- What is the maximum operating temperature of the TL431BQDBZR? The maximum operating temperature is 125°C.
- What is the minimum operating temperature of the TL431BQDBZR? The minimum operating temperature is -40°C.
- Is the TL431BQDBZR RoHS compliant? Yes, the TL431BQDBZR is RoHS compliant.
- What is the typical output impedance of the TL431BQDBZR? The typical output impedance is 0.2Ω.
- What are some common applications of the TL431BQDBZR? Common applications include shunt regulation, precision current limiting, precision constant current sinking, and isolated feedback loops for SMPS.
- Is the TL431BQDBZR suitable for automotive applications? Yes, it is AEC-Q100 qualified (grade 1) for automotive applications.
- What is the package type of the TL431BQDBZR? The device is packaged in a SOT-23 (TO-236AB) package.
