TLV431x Low-Voltage Adjustable Precision Shunt Regulator   Features • Low-Voltage Operation, VREF = 1.24 V • Adjustable Output Voltage, VO = 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 Typical • 0.25-Ω Typical Output Impedance • Ultra-Small SC-70 Package Offers 40% Smaller   Footprint Than SOT-23-3 • See TLVH431 and TLVH432 for: – Wider VKA (1.24 V to 18 V) and IK (80 mA) – Additional SOT-89 Package – Multiple Pinouts for SOT-23-3 and SOT-89 Packages