Overview
The TL431BQDBZR is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 series, which is known for its precision and versatility in voltage regulation. This device allows for adjustable output voltage between approximately 2.5V and 36V, set by two external resistors. The TL431 series, including the TL431BQDBZR, is designed for various applications requiring stable voltage references.
Key Specifications
| Attribute | Value | Unit |
|---|---|---|
| Case/Package | SOT-23 | |
| 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), 1% (A grade), 2% (Standard 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 to 36V | |
| Packaging | Tape & Reel | |
| Reference Type | Adjustable | |
| RoHS Compliance | Compliant |
Key Features
- Programmable output voltage up to 36V using two external resistors.
- Reference voltage tolerance at 25°C: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
- Typical temperature drift: 6mV (C temp), 14mV (I temp, Q temp).
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability: 1mA to 100mA.
- AEC-Q100 qualified (grade 1) for automotive applications.
- Operation from -40°C to 125°C.
Applications
- Shunt regulator.
- Precision current limiter.
- Precision constant current sink.
- Isolated feedback loop for Switch Mode Power Supply (SMPS).
- Rack server power.
- Industrial AC/DC power supplies.
- AC inverter and VF drives.
- Servo drive control modules.
- Notebook PC power adapter design.
Q & A
- What is the TL431BQDBZR?
The TL431BQDBZR is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the output voltage range of the TL431BQDBZR?
The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the operating temperature ranges for the TL431BQDBZR?
The device operates from -40°C to 125°C.
- What are the tolerance grades available for the TL431 series?
The TL431 series is available in three tolerance grades: 0.5% (B grade), 1% (A grade), and 2% (Standard grade).
- 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 regulators, precision current limiters, precision constant current sinks, and isolated feedback loops for SMPS.
- Is the TL431BQDBZR RoHS compliant?
- What is the maximum output current of the TL431BQDBZR?
The maximum output current is 100mA.
- What is the cathode current of the TL431BQDBZR?
The cathode current is 700µA.
- Is the TL431BQDBZR AEC-Q100 qualified?
