TI TLV431BQDBVR

The TLV431 device is a low-voltage, 3-terminal adjustable voltage reference with specified thermal stability over the applicable industrial and commercial temperature ranges. The output voltage can be set to any value between VREF (1.24V) and 6V using two external resistors. These devices have a lower operating voltage (1.24V) than the widely used TL431 and TL1431 shunt regulator references. When used with an optocoupler, the TLV431 device is an ideal voltage reference in isolated feedback circuits for 3V to 3.3V switch-mode power supplies. Their typical output impedance is 0.25Ω. The active output circuit provides very sharp turn-on characteristics, making them an excellent replacement for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

• Low-voltage operation, VREF = 1.24V adjustable output voltage, V0 = VREF to 6V
• Reference voltage tolerance at 25°C: 0.5% for TLV431B, 1% for TLV431A, 1.5% for TLV431
• Typical temperature drift: 4mV (0°C to 70°C); 6mV (-40°C to 85°C); 11mV (-40°C to 125°C)
• Low cathode operating current, typical 80μA
• Typical output impedance 0.25Ω
• Ultra-compact SC-70 package — 40% smaller than SOT-23-3
• Wider VKA (1.24V to 18V) and lK (80mA)
• Additional SOT-89 package available alongside SOT-23-3 and SOT-89 multi-pin options

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