KA431电子元件

©2002 Fairchild Semiconductor Corporation www.fairchildsemi.com Rev. 1.0.6 Features • Programmable Output Voltage to 36 Volts • Low Dynamic Output Impedance 0.20 Typical • Sink Current Capability of 1.0 to 100mA • Equivalent Full-Range Temperature Coefficient of 50ppm/°C Typical • Temperature Compensated for Operation Over Full Rated Operating Temperature Range • Low Output Noise Voltage • Fast Turn-on Response Description The KA431/KA431A/KA431L are three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between VREF (approximately 2.5 volts) and 36 volts with two external resistors These devices have a typical dynamic output impedance of 0.2W Active output circuitry provides a very sharp turn on characteristic, making these devices excellent replacement for zener diodes in many applications. TO-92 8-DIP 8-SOP 1. Ref 2. Anode 3. Cathode 1 1 1 1.Cathode 2.3.6.7.Anode 4.5.NC 8.Ref 1.Cathode 2.3.4.5.7.NC 6.Anode 8.Ref Internal Block Diagram 2.5 Vref CATHODE ANODE REFERENCE ANODE(A) REFERENCE (R) CATHODE (K) KA431/KA431A/KA431L Programmable Shunt Regulator KA431/KA431A/KA431L 2 Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified.) Recommended Operating Conditions Parameter Symbol Value Unit 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, Z Suffix Package DIP Package PD 770 1000 mW mW Junction Temperature TJ 150 °C Operating Temperature Range TOPR -25 ~ +85 °C Storage Temperature Range TSTG -65 ~ +150 °C Parameter Symbol Min. Typ. Max. Unit Cathode Voltage VKA VREF - 36 V Cathode Current IKA 1.0 - 100 mA KA431/KA431A/KA431L 3 Electrical Characteristics (TA = +25°C, unless otherwise specified) • TMIN = -25°C, TMAX = +85°C Parameter Symbol Conditions KA431 KA431A KA431L Unit Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Reference Input Voltage VREF VKA=VREF, IKA=10mA 2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508 V Deviation of Reference Input Voltage Over- Temperature ∆VREF/ ∆T VKA=VREF, IKA=10mA TMIN≤TA≤TMAX - 4.5 17 - 4.5 17 - 4.5 17 mV Ratio of Change in Reference Input Voltage ∆VREF/ ∆VKA IKA =10mA ∆VKA=10 V-VREF - -1.0 - 2.7 - -1.0 - 2.7 - -1.0 -2.7 mV/V to the Change in Cathode Voltage ∆VKA=36 V-10V - -0.5 -2.0 - -0.5 -2.0 - -0.5 -2.0 Reference Input Current IREF IKA=10mA, R1=10kΩ,R2=∞ - 1.5 4 - 1.5 4 - 1.5 4 µA Deviation of Reference Input Current Over Full Temperature Range ∆IREF/∆T IKA=10mA, R1=10kΩ,R2=∞ TA =Full Range - 0.4 1.2 - 0.4 1.2 - 0.4 1.2 µA Minimum Cathode Cur- rent for Regulation IKA(MIN) VKA=VREF - 0.45 1.0 - 0.45 1.0 - 0.45 1.0 mA Off - Stage Cathode Current IKA(OFF) VKA=36V,VREF=0 - 0.05 1.0 - 0.05 1.0 - 0.05 1.0 µA Dynamic Impedance ZKA VKA=VREF, IKA=1 to 100mA f ≥1.0kHz - 0.15 0.5 - 0.15 0.5 - 0.15 0.5 Ω KA431/KA431A/KA431L 4 Test Circuits Figure 1. Test Circuit for VKA=VREF Figure 2. Test Circuit for VKA≥≥≥≥VREF Figure 3. Test Circuit for lKA(OFF) KA431/KA431A/KA431L 5 Typical Performance Characteristics Figure 4. Cathode Current vs. Cathode Voltage Figure 5. Cathode Current vs. Cathode Voltage Figure 6. Change In Reference Input Voltage vs. Cathode Voltage Figure7. Dynamic Impedance Frequency Figure 8. Small Signal Voltage Amplification vs. Frequency Figure 9. Pulse Response KA431/KA431A/KA431L 6 Typical Performance Characteristics (Continued) 100p 1n 10n 100n 1µ 10µ 0 20 40 60 80 100 120 140 D C B A A VKA = Vref B VKA = 5.0 V @ IK = 10mA C VKA = 10 V @ IK = 10mA D VKA = 15 V @ IK = 10mA TA = 25 oC I K, C AT H O D E C U R R EN T( m A) CL, LOAD CAPACITANCE Figure 10. Stability Boundary Conditions KA431/KA431A/KA431L 7 Typical Application VO 1 R1 R2 -------+  Vref= VO Vref 1 R1 R2 -------+  = VO 1 R1R2-------+   Vref= Figure 11. Shunt Regulator Figure 12. Output Control for minal Fixed RegulatorThree- Ter- Figure 13. High Current Shunt Regulator Figure 14. Current Limit or Current Source Figure 15. Constant-Current Sink KA431/KA431A/KA431L 8 Mechanical Dimensions Package Dimensions in millimeters 0.46 ±0.10 1.27TYP (R2.29) 3. 86 M AX [1.27 ±0.20] 1.27TYP [1.27 ±0.20] 3.60 ±0.20 14 .4 7 ±0 .4 0 1. 02 ±0 .1 0 (0. 25 ) 4. 58 ±0 .2 0 4.58 +0.25 –0.15 0.38 +0.10 –0.05 0. 38 + 0. 10 – 0. 05 TO-92 KA431/KA431A/KA431L 9 Mechanical Dimensions (Continued) Package Dimensions in millimeters 6.40 ±0.20 3.30 ±0.30 0.130 ±0.012 3.40 ±0.20 0.134 ±0.008 #1 #4 #5 #8 0.252 ±0.008 9. 20 ± 0. 20 0. 79 2. 54 0. 10 0 0. 03 1 ( ) 0. 46 ± 0. 10 0. 01 8 ±0 .0 04 0. 06 0 ±0 .0 04 1. 52 4 ±0 .1 0 0. 36 2 ±0 .0 08 9. 60 0. 37 8 M AX 5.08 0.200 0.33 0.013 7.62 0~15° 0.300 MAX MIN 0.25 +0.10 –0.05 0.010 +0.004 –0.002 8-DIP KA431/KA431A/KA431L 10 Mechanical Dimensions (Continued) Package Dimensions in millimeters 4. 92 ±0 .2 0 0. 19 4 ±0 .0 08 0. 41 ±0 .1 0 0. 01 6 ±0 .0 04 1. 27 0. 05 0 5.72 0.225 1.55 ±0.20 0.061 ±0.008 0.1~0.25 0.004~0.001 6.00 ±0.30 0.236 ±0.012 3.95 ±0.20 0.156 ±0.008 0.50 ±0.20 0.020 ±0.008 5. 13 0. 20 2 M AX #1 #4 #5 0~ 8° #8 0. 56 0. 02 2 ( ) 1.80 0.071 M AX 0. 10 M AX 0. 00 4 MAX MIN + 0.10 -0.05 0.15 + 0.004 -0.002 0.006 8-SOP KA431/KA431A/KA431L 11 Ordering Information Product Number Output Voltage Tolerance Package Operating Temperature KA431LZ 0.5% TO-92 -25 ~ +85°C KA431LD 8-SOP KA431AZ 1% TO-92 KA431AD 8-SOP KA431 2% 8-DIP KA431Z TO-92 KA431D 8-SOP KA431/KA431A/KA431L 8/20/02 0.0m 001 Stock#DSxxxxxxxx  2002 Fairchild Semiconductor Corporation LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. 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