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| www..com PJ431/PJ431A/PJ431B Programmable Precision References diodes in many applications such as digital voltmeters, power supplies , and op amp circuitry. The 2.5 volt reference makes it convenient to obtain a stable reference from 5.0 volt logic supplies, and since The PJ431, A, B operates as a shunt regulator, it can be used as either a positive or negative tage reference. IC voltage references operate as a low temperature coefficient zener which is programmable from Vref to 36 volts with two external resistors. These devices exhibit a wide operating current range of 1.0 to 100mA with a impedance typical dynamic these of 0.22. The characteristics of T he PJ431, A, B integrated circuits are three-terminal programmable shunt regulator diodes. These monolithic references make them excellent replacements for zener FEATURES TO-92 SOT-89 * * Programmable Output Voltage to 36 Volts Voltage Reference Tolerance: PJ431A : 0.5%, Typ@25C PJ431 : 1%, Typ@25C Pin: 1. Reference 2. Anode 3. Cathode SOP-8 Pin: 1. Cathode 2. Anode 3. Anode 4. N.C. 5. N.C. 6. Anode 7. Anode 8. Reference PJ431B : 2%, Typ@25C * * * * * Low Dynamic Output Impedance, 0.22 Typical Sink Current Capability of 1.0 to 100 mA Equivalent Full-Range Temperature Coefficient of 50 ppm/ Typical Temperature Compensated for Operation over Full Rated Operating Temperature Range Low Output Noise Voltage Pin: 1. Reference 2. Anode 3. Cathode (Heatsink surface connected to Pin 2) SOT-23 BLOCK DIAGRAM Pin: 1. Reference 2. Cathode 3. Anode SOP-8 is an internally modified SOP-8 Package. Pins 2,3,6 and 7 are electrically common to the die attach flag. This internal lead frame modification decreases package thermal resistance and increases power dissipation capability when appropriately mounted on a printed on a printed circuit board. SOP-8 conforms to all external dimensions of the standard SOP-8 Package. CIRCUIT SCHEMATIC QRDERING INFORMATION Device PJ431/ A/ B CT PJ431/ A/ B CS PJ431/ A/ B CY PJ431/ A/ B CX Operating Temperature (Ambient) Package TO-92 - 20~ +85 SOP-8 SOT-89 SOT-23 1-11 2003/01 rev.A www..com PJ431/PJ431A/PJ431B Programmable Precision References MAXIMUM RATINGS (Full operating ambient temperature range applies unless otherwise noted.) Rating Cathode To Anode Voltage Cathode Current Range, Continuous Reference Input Current Range, Continuous Operating Junction Temperature Operating Ambient Temperature Range Storage Temperature Range Total Power Dissipation @ TA = 25 Derate above 25 Ambient Temperature PJ431 / 431A / 431B CT PJ431 / 431A / 431B CS PJ431 / 431A /431 B CY PJ431 / 431A / 431B CX Total Power Dissipation @ TC = 25 Derate above 25 Case Temperature PJ431 / 431A / 431B CT PJ431 / 431A / 431B CS PJ431 / 431A /431 B CY PJ431 / 431A / 431B CX 1.5 1.5 1.5 0.7 PD 0.625 0.70 0.80 0.30 W Symbol VKA IK Iref TJ TA Tstg PD Value 37 -100 to +150 -0.05 to +10 150 -20 to +85 -65 to +150 Unit V mA mA W THERMAL CHARACTERISTICS Characteristics Thermal Resistance, Junction to Ambient Thermal Resistance, Junction to Case Symbol RJA RJC Min 178 83 Max 114 41 Unit /W /W RECOMMENDED OPERATING CONDITIONS Condition/Value Cathode To Anode Voltage Cathode Current Symbol VKA IK Min Vref 1.0 Max 36 100 Unit V mA 2-11 2003/01 rev.A www..com PJ431/PJ431A/PJ431B Programmable Precision References 1 Tlow =-20 , Thigh = +85 FIGURE 1 -- TEST CIRCUIT FOR VKA = vref 2 The deviation parameter Vref is defined as the differences between the maximum and minimum values obtained over the full operating ambient temperature range the applies. FIGURE 2 -- TEST CIRCUIT FOR VKA > Vref The average temperature coefficient of the reference input voltage, Vref , is defined as : ppm (vref ) Vref@25 TA x106 = Vref x 106 TA(Vref@25 ) Vref = Vref can be positive of negative depending on whether Vref Min of Vref Max occurs at the lower ambient temperature. (Refer to Figure 6) Example: Vref = 8.0 mV and slope is positive, Vref @ 25 = 2.5V, TA = 85 Vref = 0.008 x 106 70(2.5) = 45.8 ppm/ VKA = Vref ( 1+ R1 R2 ) + Iref * R1 3 The dynamic impedance Zka is defined as: | Zka | = VKA IK FIGURE 3 -- TEST CIRCUIT FOR Ioff When the device is programmed with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of the circuit is defined as: | Zka | | Zka | ( 1 + R1 R2 ) 4 This test is not applicable to surface mount (D suffix) devices. 3-11 2003/01 rev.A www..com PJ431/PJ431A/PJ431B Programmable Precision References ELECTRICAL CHARACTERISTICS ( Ambient temperature at 25 unless otherwise noted ) PJ431 Characteristic Reference Input Voltage (Figure 1) VKA = Vref , IK = 10 mA, TA = +25 TA = Tlow to Thigh (Note 1) PJ431A PJ431 PJ431B Reference Input Voltage Deviation Over Temperature Range (Figure 1, Note 1,2,4) VKA = Vref , IK = 10 mA Ratio of Change in Reference Input Voltage to Change in Cathode to Anode Voltage IK = 10 mA (Figure 2), Symbol Min Typ Max Unit Vref 2.4875 2.475 2.45 2.495 2.495 2.495 2.5125 2.525 2.55 V Vref -- 3.0 17 mV VKA = 10V to Vref VKA = 36V to 10V Vref VKA --- - 1.4 - 1.0 - 2.7 -.2.0 mV Reference Input Current (Figure 2) IK = 10 mA, R1 = 10 k, R2 = TA = +25 TA = Tlow to Thigh (Note 1) Reference Input Current Deviation Over Temperature Range (Figure 2, Note 1,4) IK = 10 mA, R1 = 10 k, R2 = Minimum Cathode Current for Regulation VKA = Vref (Figure 1) Off-State Cathode Current (Figure 3) VKA = 36 V, Vref = 0V Dynamic Impedance (Figure 1, Note 3) VKA = Vref, Iref --- 0.7 -- 4.0 5.2 A lref -- 0.4 1.2 A Imin Ioff | Zke | -- 0.5 1.0 mA -- 2.6 1000 nA -- 0.22 0.5 IK = 1.0 mA to 100 mA, f 1.0 kHz 4-11 2003/01 rev.A www..com PJ431/PJ431A/PJ431B Programmable Precision References FIGURE 5-CATHODE CURRENT versus CATHODE VOLTAGE FIGURE 4-CATHODE CURRENT versus CATHODE VOLTAGE FIGURE 6-REFERENCE INPUT VOLTAGE versus AMBIENT TEMPERATURE FIGURE 7-REFERENCE INPUT CURRENT versus AMBIENT TEMPERATURE FIGURE 8-CHANGE IN REFERENCE INPUT VOLTAGE versus CATHODE VOLTAGE FIGURE 9 -OFF.STATE CATHODE CURRENT versus AMBIENT TEMPERATURE 5-11 2003/01 rev.A www..com PJ431/PJ431A/PJ431B Programmable Precision References FIGURE 11 - DYNAMIC IMPEDANCE VERSUS AMBIENT TEMPERATURE FIGURE 10 - DYNAMIC IMPEDANCE VERSUS FREQUENCY FIGURE 12 - OPEN LOOP VOLTAGE GAIN VERSUS FREQUENCY FIGURE 13 - SPECTRAL NOISE DENSITY FIGURE 14 - PULSE RESPONSE FIGURE 15 - STABILITY BOUNDARY CONDITIONS 6-11 2003/01 rev.A www..com PJ431/PJ431A/PJ431B Programmable Precision References FIGURE 17-TEST CIRCUIT FOR CURVES B.C. AND D OF STABILITY BOUNDARY CONDITIONS FIGURE 16-TEST CIRCUIT FOR CURVE A OF STABILITY BOUNDARY CONDITIONS FIGURE 18-SHUNT REGULATOR FIGURE 19-HIGH CURRENT SHUNT REGULATOR FIGURE 20-OUTPUT CONTROL OF A THREE-TERMINAL FIXED EGULATOR FIGURE 21-SERIES PASSEGULATOR 7-11 2003/01 rev.A www..com PJ431/PJ431A/PJ431B Programmable Precision References FIGURE 22-CONSTANT CURRENT SOURCE FIGURE 23-CONSTANT CURRENT SINK FIGURE 24-TRIAC CROWBAR FIGURE 25-SCR CROWBAR FIGURE 26-VOLTAGE MONITOR FIGURE 27-SINGLE-SUPPLY COMPARATOR WITH TEMPERATURE-COMPENSATED THRESHOLD L.E.D. indicator is "on" when V+ is between the upper and lower limits. Vin Vout V+ 2.0V 8-11 2003/01 rev.A www..com PJ431/PJ431A/PJ431B Programmable Precision References FIGURE 29-SIMPLE 400mW PHONO AMPLIFIER FIGURE 28-LINER OHMMETER FIGURE 30-HIGH EFFICIENCY STEP-DOWN SWITCHING CONVERTER TEST Line Regulation Load Regulation Output Ripple Output Ripple Efficiency CONDITIONS Vin=10V to 20V, Io=1.0A Vin=15V, Io=0A to 1.0A Vin=10V,Io=1.0A Vin=20V, Io=1.0A Vin=15V, Io=1.0A RESULTS 53mV (1.1%) 25mV (0.5%) 50mVp-p P.A.R.D. 100mVp-p P.A.R.D. 82% 9-11 2003/01 rev.A www..com PJ431/PJ431A/PJ431B Programmable Precision References TO-92 Mechanical drawing TO-92 DIMENSION DIM A B C D E F G H MILLIMETERS MIN MAX 4.3 4.7 4.3 4.7 14.3 14.3 0.435 0.485 2.19 2.81 3.3 3.7 2.42 2.66 0.375 0.425 INCHES MIN MAX 0.169 0.185 0.169 0.185 0.563 0.563 0.017 0.019 0.086 0.111 0.130 0.146 0.095 0.105 0.015 0.107 SOT-23 Mechanical drawing SOT-23 DIMENSION DIM A B C D E F G MILLIMETERS MIN MAX 2.88 2.91 0.39 0.42 1.78 2.03 0.51 0.61 1.59 1.66 1.04 1.08 0.07 0.09 INCHES MIN MAX 0.110 0.120 0.014 0.018 0.070 0.080 0.020 0.024 0.061 0.065 0.038 0.049 0.003 0.005 10-11 2003/01 rev.A www..com PJ431/PJ431A/PJ431B Programmable Precision References SOP-8 Mechanical drawing SOP-8 DIMENSION DIM A B C D F G K M P R MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27BSC 0.10 0.25 0 7 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.189 0.196 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.05BSC 0.004 0.009 0 7 0.229 0.244 0.010 0.019 SOT-89 Mechanical drawing SOT-89 Dimension DIM A B C D E F G H I J MILLIMETERS MIN MAX 4.4 4.6 1.5 1.7 2.30 2.60 0.40 0.52 1.50 1.50 3.00 3.00 0.89 1.20 4.05 4.25 1.4 1.6 0.35 0.44 INCHES MIN MAX 0.173 0.181 0.059 0.070 0.090 0.102 0.016 0.020 0.059 0.059 0.118 0.118 0.035 0.047 0.159 0.167 0.055 0.063 0.014 0.017 11-11 2003/01 rev.A |
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