Overview
The TL431IDMR2 is a three-terminal adjustable shunt voltage regulator produced by ON Semiconductor. It is part of the TL431 series, known for its high precision and versatility in various electronic applications. This device operates as a programmable shunt regulator, allowing the output voltage to be set between 2.5V and 36V using two external resistors. The TL431IDMR2 is characterized by its low dynamic output impedance, high temperature stability, and wide operating current range, making it an excellent replacement for Zener diodes in many circuits.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Input Voltage (Vref) | 2.44 - 2.495 | V |
| Adjustable Output Voltage | 2.5 to 36 | V |
| Sink Current Capability | 1 to 100 | mA |
| Typical Output Impedance | 0.22 | Ω |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Operating Temperature Range | -40°C to 125°C (Q grade) | °C |
| Minimum Cathode Current for Regulation | 0.5 to 1 mA | mA |
| Off-state Cathode Current | -180 to 500 nA | nA |
Key Features
- Programmable Output Voltage: The output voltage can be set to any value between 2.5V and 36V using two external resistors.
- Low Dynamic Output Impedance: Typical output impedance of 0.22Ω, ensuring stable voltage regulation.
- High Temperature Stability: Guaranteed temperature stability over the entire operating temperature range, including automotive grades.
- Wide Operating Current Range: Operates with a sink current capability of 1 to 100 mA.
- Low Output Noise: Features low output noise, making it suitable for precision applications.
- AEC-Q100 Qualified: Suitable for automotive applications due to its qualification under the AEC-Q100 standard.
Applications
- Power Supplies: Used in adjustable power supplies and switching power supplies for voltage regulation.
- Industrial and Automotive Systems: Suitable for industrial and automotive applications due to its wide operating temperature range and high reliability.
- Digital Voltmeters and Measurement Equipment: Used as a stable voltage reference in digital voltmeters and other measurement equipment.
- Op-Amp Circuitry: Can be used as a replacement for Zener diodes in op-amp circuits to provide a stable reference voltage.
Q & A
- What is the adjustable output voltage range of the TL431IDMR2?
The output voltage can be set to any value between 2.5V and 36V using two external resistors.
- What is the typical output impedance of the TL431IDMR2?
The typical output impedance is 0.22Ω.
- What is the operating temperature range for the TL431IDMR2?
The device operates from -40°C to 125°C for the Q grade.
- What is the minimum cathode current required for regulation?
The minimum cathode current for regulation is 0.5 to 1 mA.
- Is the TL431IDMR2 suitable for automotive applications?
- What are some common applications of the TL431IDMR2?
Common applications include power supplies, industrial and automotive systems, digital voltmeters, and op-amp circuitry.
- How does the TL431IDMR2 compare to Zener diodes?
The TL431IDMR2 is an excellent replacement for Zener diodes due to its high precision, low output impedance, and adjustable output voltage.
- What is the reference voltage tolerance at 25°C for the TL431IDMR2?
The reference voltage tolerance at 25°C is 0.5% for the B grade, 1% for the A grade, and 2% for the standard grade.
- What is the maximum cathode to anode voltage for the TL431IDMR2?
The maximum cathode to anode voltage is 37V.
- What is the storage temperature range for the TL431IDMR2?
The storage temperature range is -65°C to 150°C.
