TLV431AIDBZR

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 any value between VREF (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.

Applications

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

Key features

• Low-Voltage Operation, VREF = 1.24 V
• Adjustable Output Voltage, V0 = VREF to 6 V
• Reference Voltage Tolerances at 25°C: 0.5% for TLV431B, 1% for TLV431A, 1.5% for TLV431
• Typical Temperature Drift: – 4 mV (0°C to 70°C), – 6 mV (-40°C to 85°C), – 11 mV (-40°C to 125°C)
• Low Operational Cathode Current, 80 μA Typ
• 0.25-Ω Typical Output Impedance
• Ultra-Small SC-70 Package Offers 40% Smaller Footprint Than SOT-23-3
• Wider VK A (1.24 V to 18 V) and lK (80 mA)
• Additional SOT-89 Package
• Multiple Pinouts for SOT-23-3 and SOT-89 Packages