Datasheet LM431A (ON Semiconductor) - 2
| Manufacturer | ON Semiconductor |
| Description | Adjustable/2.5 V, 2% Tolerance Shunt Regulator |
| Pages / Page | 9 / 2 — LM431A, LM431B, LM431C. ABSOLUTE MAXIMUM RATINGS. Symbol. Parameter. … |
| File Format / Size | PDF / 303 Kb |
| Document Language | English |
LM431A, LM431B, LM431C. ABSOLUTE MAXIMUM RATINGS. Symbol. Parameter. Value. Unit. RECOMMENDED OPERATING CONDITIONS. Min. Max
Model Line for this Datasheet
Text Version of Document
link to page 2
LM431A, LM431B, LM431C ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit
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 − LM431xC −25 to +85 °C Operating Temperature Range − LM431xI −40 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 CONDITIONS Symbol Parameter Min Max Unit
VKA Cathode Voltage VREF 36 V IKA Cathode Current 1.0 100 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)
LM431A LM431B LM431C Symbol Parameter Conditions Min Typ Max Min Typ Max Min Typ Max Unit
VREF Reference Input VKA = VREF, IKA = 10 mA 2.450 2.500 2.550 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 − 4.5 17.0 mV Reference Input TMIN ≤ TA ≤ TMAX (Note 1) Voltage Over− Temperature DVREF/ Ratio of Change in IKA = 10 mA DVKA = − −1.0 −2.7 − −1.0 −2.7 − −1.0 −2.7 mV/V DVKA Reference Input 10 V−VREF Voltage to the Change in Cathode DVKA = − −0.5 −2.0 − −0.5 −2.0 − −0.5 −2.0 Voltage 36 V−10 V IREF Reference Input IKA = 10 mA, R1 = 10 kW, − 1.5 4.0 − 1.5 4.0 − 1.5 4.0 mA Current R2 = ∞ DIREF/DT Deviation of IKA = 10 mA, R1 = 10 kW, − 0.4 1.2 − 0.4 1.2 − 0.4 1.2 mA Reference Input R2 = ∞, TA = Full Range Current Over Full Temperature Range IKA(MIN) Minimum Cathode VKA = VREF − 0.45 1.00 − 0.45 1.00 − 0.45 1.00 mA Current for Regulation IKA(OFF) Off − Stage VKA = 36 V, VREF = 0 − 0.05 1.00 − 0.05 1.00 − 0.05 1.00 mA Cathode Current ZKA Dynamic VKA = VREF, IKA = 1 to 100 − 0.15 0.50 − 0.15 0.50 − 0.15 0.50 W Impedance mA, 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. LM431xC: TMIN = −25°C, TMAX = +85°C LM431xI: TMIN = −40°C, TMAX = +85°C
www.onsemi.com 2
LM431A, LM431B, LM431C ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit
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 − LM431xC −25 to +85 °C Operating Temperature Range − LM431xI −40 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 CONDITIONS Symbol Parameter Min Max Unit
VKA Cathode Voltage VREF 36 V IKA Cathode Current 1.0 100 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)
LM431A LM431B LM431C Symbol Parameter Conditions Min Typ Max Min Typ Max Min Typ Max Unit
VREF Reference Input VKA = VREF, IKA = 10 mA 2.450 2.500 2.550 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 − 4.5 17.0 mV Reference Input TMIN ≤ TA ≤ TMAX (Note 1) Voltage Over− Temperature DVREF/ Ratio of Change in IKA = 10 mA DVKA = − −1.0 −2.7 − −1.0 −2.7 − −1.0 −2.7 mV/V DVKA Reference Input 10 V−VREF Voltage to the Change in Cathode DVKA = − −0.5 −2.0 − −0.5 −2.0 − −0.5 −2.0 Voltage 36 V−10 V IREF Reference Input IKA = 10 mA, R1 = 10 kW, − 1.5 4.0 − 1.5 4.0 − 1.5 4.0 mA Current R2 = ∞ DIREF/DT Deviation of IKA = 10 mA, R1 = 10 kW, − 0.4 1.2 − 0.4 1.2 − 0.4 1.2 mA Reference Input R2 = ∞, TA = Full Range Current Over Full Temperature Range IKA(MIN) Minimum Cathode VKA = VREF − 0.45 1.00 − 0.45 1.00 − 0.45 1.00 mA Current for Regulation IKA(OFF) Off − Stage VKA = 36 V, VREF = 0 − 0.05 1.00 − 0.05 1.00 − 0.05 1.00 mA Cathode Current ZKA Dynamic VKA = VREF, IKA = 1 to 100 − 0.15 0.50 − 0.15 0.50 − 0.15 0.50 W Impedance mA, 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. LM431xC: TMIN = −25°C, TMAX = +85°C LM431xI: TMIN = −40°C, TMAX = +85°C
www.onsemi.com 2
