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| www..com PJ432/PJ432A/PJ432B Adjustable Precision Shunt T he PJ432 is a three-terminal adjustable shunt regulator with specified thermal stability. The output voltage may TO-92 be set to any value between Vref (approximately 1.24V) and 18V with two external resistors. The PJ432 has a typical output impedance of 0.15 . Active output circuitry Pin: 1. Reference 2. Anode 3. Cathode provides a very sharp turn-on characteristic, making the PJ432 excellent replacement for zener diode in many applications. SOT-89 Pin: 1. Reference 2. Cathode 3. Anode FEATURES Equivalent Full-Range Temperature Coefficient 50 ppm/ Temperature Compensated for Operation over Full Rated Operating Temperature Range Adjustable Output Voltage Fast Turn-On Response Sink Current Capability of 1.0 to 100 mA Low(0.15 Type) Dynamic Output Impedance Low Output Noise SOT-23 Pin: 1. Reference 2. Cathode 3. Anode SYMBOL REFERENCE (R) ANODE (A) CATHODE (K) ORDERING INFORMATION Device PJ432/A/B CT PJ432/A/B CX PJ432/A/B CY Operating Temperature (Ambient) -20 to +85 TO-92 SOT-23 SOT-89 Package ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE (unless otherwise noted) Parameter Cathode voltage(see Note 1) Continuous cathode current range Reference input current range Operating free-air Temperature range Storage Temperature Lead temperature 1.6mm from case for 10 seconds Power Dissipation (see Note 2,3) TO-92 SOT-89 SOT-23 Note 1:Voltage values are with respect to the anode terminal unless otherwise noted. Note 2: TJ Max = 150 Note 3: Rating apply to ambient temperature at 25 1-8 2003/01.ver.A 0.625 0.80 0.30 W Value 20 -10 to 250 10mA -20 to +85 -60 to +150 260 Units V mA mA www..com PJ432/PJ432A/PJ432B Adjustable Precision Shunt RECOMMENDED OPERATING CONDITIONS Parameter Cathode voltage, VKA Cathode current, IK(for regulation) MIN Vref 1 MAX 18 100 TYP V mA ELECTRICAL CHARACTERISTICS AT 25 FREE-AIR TEMPERATUREUnless Otherwise Noted Parameter Reference Voltage PJ432A PJ432 PJ432B Vref Temp. Deviation Reference Input Current Radio of change in Vref to Change in Cathode Voltage Iref Temp. Deviation Minimum Operating Current Off-state Cathode Current Dynamic Output Impedance Symbol Vref VDEV Iref Vref VKA Iref(DEV) Imin Ioff |ZKA| Test Conditions VKA=Vref,IK=10mA TA = +25 MIN 1.233 1.227 1.215 --------- Typ 1.240 1.240 1.240 10 0.15 -1.0 0.1 60 0.5 0.5 0.25 MAX 1.246 1.252 1.264 25 4.0 -2.7 4.0 200 2.0 2.0 0.4 UNIT V mV A mV/V A A A TA=-40to+85 VKA= Vref, IK=10mA R1=10K,R2= , IK=10mA IK=10mA, VKA =16V to Vref TA=-40 to+85 R1=10K,R2= , IK=10mA VKA=Vref VKA=6V Vref=0V VKA=16V f<1KHz, VKA=Vref IK=100A to 100mA Note 4. Deviation of reference input voltage, VDEV , is defined as the maximum vatiation of the reference over the full temperature range. The average temperature coefficient of the reference input voltageVref is defined as: .......................... (PPM/) Where : T2-T1=full temperature change. Vref can be positive or negativedepending on whether the slope is positive or negative. Note 4. The dynamic output impedance, Rz, is defined as : When the device is programmed with two external resistors R1and R2(see Figure 2). The dynamic output impedance of the overall circuit, is defined as : 2-8 2003/01.ver.A www..com PJ432/PJ432A/PJ432B Adjustable Precision Shunt FIGURE 1. TEST CIRCUIT FOR VKA = VREF FIGURE 2. TEST CIRCUIT FOR VKA > VREF FIGURE 3. TEST CIRCUIT FOR off-state CURRENT FIGURE 4.CATHODE CURRENT versus CATHODE VOLTAGE FIGURE 5.CATHODE CURRENT versus CATHODE VOLTAGE FIGURE 6.SHUNT REGULATOR 3-8 2003/01.ver.A www..com PJ432/PJ432A/PJ432B Adjustable Precision Shunt FIGURE 7. SINGLE-SUPPLY COMPARATOR WITH TEMPERATURE COMPENEATED THREEHOLD APPLICATION EXAMPLE FIGURE 8. VOLTAGE MONITOR FIGURE 9. DELAY TIMER FIGURE 10. CURRENT LIMITER OR CURRENT SOURCE FIGURE 11. CONTACNT-CURRENT SINK 4-8 2003/01.ver.A www..com PJ432/PJ432A/PJ432B Adjustable Precision Shunt FIGURE 13. CROW BAR FIGURE 12. HIGHER-CURRENT SHOUNT REGULATOR FIGURE 14. OVER-VOLTAGE/UNDER-VOLTAGE PROTECTION TYPICAL PERFORMANCE CHARACTERISTICS 5-8 2003/01.ver.A www..com PJ432/PJ432A/PJ432B Adjustable Precision Shunt 6-8 2003/01.ver.A www..com PJ432/PJ432A/PJ432B Adjustable Precision Shunt 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 7-8 2003/01.ver.A www..com PJ432/PJ432A/PJ432B Adjustable Precision Shunt 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 8-8 2003/01.ver.A |
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