TI TLV431BQDBVRQ1

The TLV431 device is a low-voltage 3-terminal adjustable voltage reference with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to 1.24V on stand alone mode or any value between V_REF (1.24 V) and 6 V with two external resistors. These devices operate from a lower voltage (1.24 V) 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 3-V to 3.3-V switching-mode power supplies. These devices have a typical output impedance of 0.25 Ω. Active output circuitry provides a very sharp turn-on characteristic, making them excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results: Device Temperature Grade 1: -40°C to 125°C Ambient Operating Temperature Range
• Low-Voltage Operation, V_REF = 1.24 V
• Adjustable Output Voltage, V_0 = V_REF to 6 V
• Reference Voltage Tolerances at 25°C
  • 0.5% for TLV431B
  • 1% for TLV431A
• Typical Temperature Drift
  • 11 mV (-40°C to 125°C)
• Low Operational Cathode Current, 80 μA Typ
• 0.25-Ω Typical Output Impedance

• Adjustable Voltage and Current Referencing
• Secondary Side Regulation in Flyback SMPSs
• Zener Replacement
• Voltage Monitoring
• Comparator with Integrated Reference