TL431/TL431AInternal Block Diagram + - Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified.) ParameterSymbolValueUnit Cathode Voltage VKA 37 V Cathode Current Range (Continuous) IKA -100 ~ +150 mA Reference Input Current Range IREF -0.05 ~ +10 mA Power Dissipation D, LP Suffix Package PD 770 mW P Suffix Package 1000 mW Operating Temperature Range TOPR -25 ~ +85 °C Junction Temperature TJ 150 °C Storage Temperature Range TSTG -65 ~ +150 °C Recommended Operating ConditionsParameterSymbolMinTypMaxUnit Cathode Voltage VKA VREF - 36 V Cathode Current IKA 1.0 - 100 mA 2