Discover the TL431 adjustable shunt regulator in this detailed TL431 animation! Learn the working principle of this versatile component used in TL431 circuits for precise voltage and current regulation. Explore real-world applications, including TL431 voltage regulator circuits, adjustable voltage regulators, and current limiters. This video explains how the TL431 works, highlighting its zener adjustable functionality, feedback circuits, and role in overvoltage protection. Dive into TL431 design, compare TL432 vs TL431, and understand its importance in shunt voltage regulators and voltage reference circuits. Perfect for electronics enthusiasts, students, and engineers!


TL431, TL432 Precision Programmable Reference:
The TL431 and TL432 devices are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5V) and 36V, with two external resistors. These devices have a typical output impedance of 0.2Ω. Active output circuitry provides a very sharp turnon characteristic, making these devices excellent
replacements for Zener diodes in many applications, such as on-board regulation, adjustable power supplies, and switching power supplies. The TL432 device has exactly the same functionality and electrical specifications as the TL431 device, but has
different pinouts.
1 Features
• Reference voltage tolerance at 25°C
– 0.5% (B grade)
– 1% (A grade)
– 2% (Standard grade)
• Adjustable output voltage: Vref to 36V
• Operation from −40°C to 125°C
• Typical temperature drift (TL43xB)
– 6mV (C temp)
– 14mV (I temp, Q temp)
• Low Output Noise
• 0.2Ω Typical output impedance
• Sink-current capability: 1mA to 100mA


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0:00 - Introduction to TL431
0:06 - Overview of TL431 Components and Operation
0:38 - Voltage Reference Circuit Design
1:03 - Design Tips for Stability and Capacitive Loads
1:38 - Precision Voltage Regulator with TL431
1:53 - Creating a Constant Current Sink and Current Limiter
2:19 - Using TL431 as a Voltage Comparator
2:38 - Window Voltage Detector with TL431
2:58 - TL432 and NXP TL431 MFDT Variants (Mirrored Pin Configuration)

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