link to page 2 KA431A, KA431LABSOLUTE MAXIMUM RATINGSSymbolParameterValueUnit VKA Cathode Voltage 37 V IKA Cathode Current Range (Continuous) −100 to +150 mA IREF Reference Input Current Range −0.05 to +10 mA PD Power Dissipation 770 mW RθjA Thermal Resistance, Junction to Ambient 160 °C/W TOPR Operating Temperature Range −25 to +85 °C TJ Junction Temperature 150 °C TSTG Storage Temperature Range −65 to +150 °C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. RECOMMENDED OPERATING CONDITIONSSymbolParameterMinMaxUnit VKA Cathode Voltage VREF 36 V IKA Cathode Current 1 100 mA Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. ELECTRICAL CHARACTERISTICS (Values are at TA = 25°C unless otherwise noted) KA431AKA431LSymbolParameterConditionsMinTypMaxMinTypMaxUnit VREF Reference Input VKA = VREF, IKA = 10 mA 2.470 2.495 2.520 2.482 2.495 2.508 V Voltage DVREF/DT Deviation of VKA = VREF, IKA = 10 mA − 4.5 17.0 − 4.5 17.0 mV Reference Input TMIN ≤ TA ≤ TMAX (Note 1) Voltage Over− Temperature DVREF/ Ratio of Change IKA = 10 mA DVKA = 10 V−VREF − −1.0 −2.7 − −1.0 −2.7 mV/V DVKA in Reference Input Voltage to the Change in DVKA = 36 V−10 V − −0.5 −2.0 − −0.5 −2.0 Cathode Voltage IREF Reference Input IKA = 10 mA, R1 = 10 kW, R2 = ∞ − 1.5 4.0 − 1.5 4.0 mA Current DIREF/DT Deviation of IKA = 10 mA, R1 = 10 kW, R2 = ∞, − 0.4 1.2 − 0.4 1.2 mA Reference Input TA = Full Range Current Over Full Temperature Range IKA(MIN) Minimum VKA = VREF − 0.45 1.00 − 0.45 1.00 mA Cathode Current for Regulation IKA(OFF) Off − Stage VKA = 36 V, VREF = 0 − 0.05 1.00 − 0.05 1.00 mA Cathode Current ZKA Dynamic VKA = VREF, IKA = 1 to 100 mA, − 0.15 0.50 − 0.15 0.50 W Impedance f ≥ 1.0 kHz Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. 1. TMIN = −25°C, TMAX = +85°C. www.onsemi.com2