Overview
The TL431BQLPM is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 series, known for its precision and versatility in voltage regulation. This device offers specified thermal stability over a wide range of temperatures, making it suitable for automotive, commercial, and military applications. The TL431BQLPM can be used to set output voltages between approximately 2.5V and 36V using two external resistors, and it features a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade) | % |
| Adjustable Output Voltage | Vref to 36 V | V |
| Operating Temperature Range | -40°C to 125°C | °C |
| Typical Temperature Drift | 6 mV (C Temp), 14 mV (I Temp, Q Temp) | mV |
| Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | TO-92 (LP) | - |
| Pins | 3 | - |
| Package Quantity | 2000 (Reel) | - |
Key Features
- Reference voltage tolerance at 25°C: 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade)
- Adjustable output voltage: Vref to 36 V with two external resistors
- Operation from -40°C to 125°C
- Typical temperature drift: 6 mV (C Temp), 14 mV (I Temp, Q Temp)
- Low output noise
- Typical output impedance: 0.2 Ω
- Sink-current capability: 1 mA to 100 mA
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes
Applications
- Adjustable voltage and current referencing
- Secondary side regulation in flyback SMPSs
- Zener replacement
- Voltage monitoring
- Comparator with integrated reference
- On-board regulation, adjustable power supplies, and switching power supplies
- Rack server power, industrial AC/DC, AC inverter & VF drives, servo drive control module, notebook PC power adapter design
Q & A
- What is the TL431BQLPM used for?
The TL431BQLPM is used as a three-terminal adjustable shunt regulator for various applications including voltage regulation, Zener diode replacement, and voltage monitoring.
- What is the adjustable output voltage range of the TL431BQLPM?
The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the temperature ranges for the TL431BQLPM?
The device operates from -40°C to 125°C.
- What is the typical output impedance of the TL431BQLPM?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431BQLPM?
The sink-current capability ranges from 1 mA to 100 mA.
- Can the TL431BQLPM replace Zener diodes?
- What are some common applications of the TL431BQLPM?
- What is the package type and pin count of the TL431BQLPM?
The package type is TO-92 (LP) with 3 pins.
- What is the reference voltage tolerance at 25°C for the TL431BQLPM?
The reference voltage tolerance at 25°C is 0.5% for the B Grade.
- How does the TL431BQLPM handle temperature drift?
The device has a typical temperature drift of 6 mV (C Temp) and 14 mV (I Temp, Q Temp).
