Overview
The TL431ILP is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 series, known for its precision and programmable reference voltage capabilities. This device is designed to provide a stable reference voltage that can be adjusted between approximately 2.5V and 36V using two external resistors. The TL431ILP is characterized by its thermal stability over a wide temperature range, making it suitable for various applications including automotive, commercial, and military environments.
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 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 |
| Cathode Voltage | 37 V | V |
| Continuous Cathode Current Range | −100 to +150 mA | mA |
| Reference Input Current Range | −0.05 to +10 mA | mA |
| Operating Junction Temperature Range | −40°C to 125°C | °C |
Key Features
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability ranging from 1 mA to 100 mA.
- Operation over a wide temperature range from −40°C to 125°C.
- Low output drift versus temperature, ensuring good stability over the entire temperature range.
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
Applications
- Rack server power supplies.
- Industrial AC/DC power supplies.
- AC inverter and variable frequency (VF) drives.
- Servo drive control modules.
- Notebook PC power adapter designs.
- On-board regulation and adjustable power supplies.
- Switching power supplies.
Q & A
- What is the TL431ILP?
The TL431ILP is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431ILP?
The output voltage can be adjusted between approximately 2.5V and 36V using two external resistors.
- What are the temperature ranges for the TL431ILP?
The device operates from −40°C to 125°C.
- What is the typical output impedance of the TL431ILP?
The typical output impedance is 0.2 Ω.
- What are the sink-current capabilities of the TL431ILP?
The sink-current capability ranges from 1 mA to 100 mA.
- What are some common applications of the TL431ILP?
Common applications include rack server power supplies, industrial AC/DC power supplies, AC inverters, servo drive control modules, and notebook PC power adapter designs.
- How does the TL431ILP compare to Zener diodes?
The TL431ILP has an active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What are the different grades of the TL431ILP based on reference voltage tolerance?
The device is available in three grades: B grade (0.5% tolerance), A grade (1% tolerance), and Standard grade (2% tolerance) at 25°C.
- What is the maximum cathode voltage for the TL431ILP?
The maximum cathode voltage is 37 V.
- What is the operating junction temperature range for the TL431ILP?
The operating junction temperature range is from −40°C to 125°C.
