Overview
The TL431AILPM is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 series, known for its high thermal stability and adjustable output voltage. This device is suitable for various applications, including on-board regulation, adjustable power supplies, and switching power supplies. The TL431AILPM offers a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many scenarios. It operates over a wide temperature range and is available in different grades with varying initial tolerances.
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 (typical) | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Cathode to Anode Voltage | 37 V | V |
| Operating Junction Temperature | 150 °C | °C |
| Storage Temperature Range | −65°C to 150°C | °C |
| Package Type | TO-92 (LP) |
Key Features
- Adjustable output voltage from Vref (approximately 2.5 V) to 36 V using two external resistors.
- High thermal stability over automotive, commercial, and military temperature ranges.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability from 1 mA to 100 mA.
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Low output drift versus temperature, ensuring good stability over the entire temperature range.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
- On-board regulation and voltage referencing.
- Adjustable power supplies and switching power supplies.
- Rack server power and industrial AC/DC power supplies.
- AC inverter and variable frequency (VF) drives.
- Servo drive control modules and notebook PC power adapter designs.
Q & A
- What is the TL431AILPM used for?
The TL431AILPM is used as a three-terminal adjustable shunt regulator for applications such as on-board regulation, adjustable power supplies, and switching power supplies.
- What is the adjustable output voltage range of the TL431AILPM?
The output voltage can be adjusted from Vref (approximately 2.5 V) to 36 V using two external resistors.
- What are the operating temperature ranges for the TL431AILPM?
The device operates from −40°C to 125°C.
- What is the typical output impedance of the TL431AILPM?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431AILPM?
The sink-current capability ranges from 1 mA to 100 mA.
- What are the different grades of the TL431AILPM and their tolerances?
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 maximum cathode to anode voltage for the TL431AILPM?
The maximum cathode to anode voltage is 37 V.
- What is the storage temperature range for the TL431AILPM?
The storage temperature range is from −65°C to 150°C.
- What package type is the TL431AILPM available in?
The TL431AILPM is available in the TO-92 (LP) package.
- What are some common applications of the TL431AILPM?
Common applications include rack server power, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter designs.
