HGSEMI TL431ACM/TR

The TL431 and TL432 are three-terminal adjustable shunt regulators. The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors. These devices feature a typical output impedance of 0.2Ω. The active output circuit provides a very sharp turn-on characteristic, making these devices an excellent replacement for Zener diodes in many applications, including on-board regulation, adjustable power supplies, and switching power supplies. The TL432 offers identical functionality and electrical characteristics to the TL431, but with a different package pinout. Both the TL431 and TL432 are available in three grades — B, A, and standard — with initial tolerances of 0.5%, 1%, and 2% at 25°C, respectively. In addition, low output temperature drift ensures excellent stability across the entire temperature range. The TL43xxC operates over a temperature range of 0°C to 70°C. The TL43xxI operates over a temperature range of -40°C to 85°C.

• Reference voltage tolerance at 25°C — 0.5% (Grade B) — 1% (Grade A) — 2% (Standard Grade)
• Adjustable output voltage: Vref to 36V
• Operating range: -40°C to 85°C
• Typical temperature drift (TL43xB)
  • 6 mV (Grade C temperature)
• Low output noise
• Typical output impedance: 0.2Ω
• Sink current capability: 1mA to 100mA

• Adjustable voltage and current reference
• Secondary-side regulation in flyback SMPS
• Zener diode replacement
• Voltage monitoring
• Comparator with integrated reference