V-Ref Adjustable 1.24V to 6V 15mA 5-Pin SOT-23 T/R

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 O. 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. 

Low-Voltage Operation, V_REF = 1.24 V

Adjustable Output Voltage, V_O = V_REF 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-O Typical Output Impedance

Ultra-Small SC-70 Package Offers 40% Smaller Footprint Than SOT-23-3

See TLVH431 and TLVH432 for:

• Wider V_KA (1.24 V to 18 V) and I_K (80 mA)
• Additional SOT-89 Package
• Multiple Pinouts for SOT-23-3 and SOT-89 Packages