Overview
The TL431BQLPME3, produced by Texas Instruments, is a three-terminal adjustable shunt regulator. This device is part of the TL431 family, known for its precision and versatility in various electronic applications. The TL431BQLPME3 offers adjustable output voltage, high thermal stability, and low output noise, making it an excellent choice for on-board regulation, adjustable power supplies, and switching power supplies. It is available in several packages, including the TO-92 package, and is characterized for operation over a wide temperature range.
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 (approximately 2.5V) to 36V | 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 (typical) | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Package Type | TO-92 |
Key Features
- Adjustable Output Voltage: The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- High Thermal Stability: Specified thermal stability over applicable automotive, commercial, and military temperature ranges.
- Low Output Noise: Provides low output noise, making it suitable for noise-sensitive applications.
- Sharp Turn-On Characteristic: Active output circuitry ensures a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Low Output Impedance: Typical output impedance of 0.2 Ω.
- Wide Operating Temperature Range: Operation from −40°C to 125°C, depending on the device grade.
Applications
- On-Board Regulation: Suitable for regulating voltages on PCBs.
- Adjustable Power Supplies: Can be used in adjustable power supply designs.
- Switching Power Supplies: Excellent for use in switching power supply applications.
- Rack Server Power: Used in rack server power supply designs.
- Industrial AC/DC and AC Inverter & VF Drives: Suitable for industrial power conversion applications.
- Servo Drive Control Module: Used in servo drive control modules.
- Notebook PC Power Adapter Design: Can be used in power adapter designs for notebooks.
Q & A
- What is the TL431BQLPME3?
The TL431BQLPME3 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431BQLPME3?
The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What are the temperature ranges for the TL431BQLPME3?
The device is characterized for operation from −40°C to 125°C, depending on the device grade.
- What is the typical output impedance of the TL431BQLPME3?
The typical output impedance is 0.2 Ω.
- What are the common applications of the TL431BQLPME3?
Common applications include on-board regulation, adjustable power supplies, switching power supplies, rack server power, industrial AC/DC, and servo drive control modules.
- How does the TL431BQLPME3 compare to Zener diodes?
The TL431BQLPME3 provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What is the sink-current capability of the TL431BQLPME3?
The sink-current capability ranges from 1 mA to 100 mA.
- What are the different grades of the TL431BQLPME3 in terms of reference voltage tolerance?
The device is available in three grades with initial tolerances of 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the typical temperature drift of the TL431BQLPME3?
The typical temperature drift is 6 mV (C temp) and 14 mV (I temp, Q temp).
- What package type is the TL431BQLPME3 available in?
The TL431BQLPME3 is available in the TO-92 package.
