
DIODES TL431BSA-7 Adjustable Precision Shunt Regulator
DIODES TL431BSA-7 Product Overview
The TL431BSA-7 is a three-terminal adjustable shunt regulator from Diodes Incorporated, offering excellent temperature stability and output current handling capability up to 100mA . The output voltage may be set to any chosen voltage between 2.495V and 36V by selection of two external divider resistors . The device can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance .
The B grade variant offers an initial tolerance of ±0.5% at 25°C . Operating temperature range is -40°C to +125°C . The device is housed in a compact SOT-23-3 surface mount package, making it suitable for space-constrained designs . Typical dynamic output impedance is 0.2Ω .
DIODES TL431BSA-7 Key Specifications
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Value |
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Manufacturer |
Diodes Incorporated |
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Reference Type |
Shunt, Adjustable |
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Output Voltage Range |
2.495V to 36V |
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Initial Accuracy |
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Output Current Capability |
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Cathode Current (Min) |
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Dynamic Output Impedance |
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Operating Temp (TA) |
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Package |
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Mounting |
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Packaging |
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RoHS |
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Part Status |
DIODES TL431BSA-7 Key Advantages
The TL431BSA-7 employs a shunt regulator topology that provides precise programmable output voltage with a sharp turn-on characteristic . The ±0.5% initial accuracy makes it suitable for precision applications where tight voltage regulation is critical . The 0.2Ω dynamic output impedance ensures stable performance under varying load conditions .
The SOT-23-3 package enables efficient use of PCB space and is ideal for high-volume automated assembly . The wide operating temperature range of -40°C to +125°C supports demanding industrial and automotive environments . The device offers low output noise characteristics, making it suitable for noise-sensitive applications . With an output current capability of 100mA and cathode current down to 1mA, it provides flexibility in low-power designs .
DIODES TL431BSA-7 Typical Applications
Precision adjustable voltage references
Switched-mode power supply (SMPS) feedback circuits
Linear regulator error amplifiers
Voltage monitoring and overvoltage protection circuits
Battery charger current limiting
Power supply crowbar circuits
Data acquisition systems requiring stable reference
Consumer electronics and portable devices
Why Choose the DIODES TL431BSA-7?
The TL431BSA-7 combines 2.495V to 36V adjustable output, ±0.5% accuracy, and 100mA output current capability in a compact SOT-23-3 package from Diodes Incorporated, a trusted provider of analog semiconductor solutions. It delivers stable, reliable, and precise voltage regulation for applications where accuracy and design simplicity are critical. The shunt regulator architecture offers ease of use with two external resistors to set the output voltage, while the active lifecycle status ensures continued availability for production requirements . The TL431BSA-7 is a versatile and cost-effective choice for precision voltage reference and regulation applications.
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