JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD JC(T CJ431 SOT-23 Encapsulate Adjustable Reference Source Adjustable Accurate Reference Source DEVICE DESCRIPSION The CJ431 is a three-terminal adjustable shunt regulator offering excellent temperature stability . This device has a typical dynamic output impedance of 0.2Ω. The device can be used as a replacement for zener diodes in many applications. SOT-23 1. REFERENCE 2. CATHODE FEATURES 3. ANODE z The output voltage can be adjusted to 36V z Low dynamic output impedance, its typical value is 0.2Ω z Trapping current capability is 1 to 100mA z Low output noise voltage z Fast on -state response z The effective temperature compensation in the working range of full temperature z The typical value of the equivalent temperature factor in the whole temperature scope is 50 ppm/℃ APPLICATION z Shunt Regulator z High-Current Shunt Regulator z Precision Current Limiter ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified) Parameter Cathode Voltage Symbol Value Unit VKA 37 V Cathode Current Range (Continuous) IKA -100~+150 mA Reference lnput Current Range Iref 0.05~+10 mA Power Dissipation PD 300 mW Thermal Resistance from Junction to Ambient RθJA 417 ℃/W Operating Junction Temperature Tj 150 ℃ Operating Ambient Temperature Range Storage temperature Range www.cj-elec.com Topr -25~+85 ℃ Tstg -65~+150 ℃ 1 J,Aug,2015 ELECTRICAL CHARACTERISTICS (Ta=25℃ unless otherwise specified) Parameter Symbol Reference input voltage (Fig.1) Deviation of reference input voltage over temperature (note) (Fig.1) conditions Test Vref VKA=VREF, IKA=10mA △Vref /△T VKA =VREF, IKA =10mA TMIN≤Ta≤TMAX Typ Max Unit 2.475 2.5 2.525 V 4.5 17 mV -1.0 -2.7 mV/V -0.5 -2.0 mV/V 1.5 4 μA R2=∞ TA=-25 to 85℃ 0.4 1.2 μA VKA=VREF 0.45 1.0 mA VKA=36V,VREF=0 0.05 1.0 μA 0.15 0.5 Ω △VKA Ratio of change in reference input voltage to the change in cathode Min △Vref /△VKA IKA=10mA voltage (Fig.2) =10V~VREF △VKA =36V~ 10V Reference input current (Fig.2) Deviation Of reference input current over full temperature range (Fig.2) Minimum cathode current for regulation (Fig.1) Off-state cathode Current (Fig.3) Dynamic impedance IKA= 10mA,R1=10kΩ lref R2=∞ lKA=10mA, R1=10kΩ △lref /△T IKA(min) IKA(OFF) VKA=VREF, lKA=1 to 100mA ZKA f≤1.0kHz Note: TMIN=-25℃ ,TMAX=+85℃ CLASSIFICATION RI Vref Rank Range IK VKA Figure 2. Test Circuit for VKA > Vref VKA Input R1 Vref 2.475-2.525 2.487-2.513 Figure 1. Test Circuit for VKA = Vref Input 1% 0.5% Iref R2 Input Ioff IK V KA Figure 3. Test Circuit for Ioff VKA ǒ Ǔ + Vref 1 ) R1 ) Iref S R1 R2 Vref www.cj-elec.com 2 J,Aug,2015 Typical Characteristics Cathode Voltage IK, CATHODE CURRENT (mA) 150 100 50 0 -50 VKA=Vref -100 Ta=25℃ -2 -1 0 1 2 VKA, CATHODE VOLTAGE 3 (V) KA Cathode Current versus Cathode Voltage 800 IK, CATHODE CURRENT (uA) 700 KA 600 IKA(min) 500 400 300 200 100 0 -200 -1.0 ref VKA=Vref -100 Ta=25℃ -0.5 0.0 0.5 1.0 1.5 VKA, CATHODE VOLTAGE 2.0 2.5 3.0 (V) Test Circuit for VKA=Vref www.cj-elec.com 3 J,Aug,2015 Typical Characteristics Change in Reference Input Voltage versus Cathode Voltage 0 △Vref, REFERENCE INPUT VOLTAGE (mV) IK=10mA Ta=25℃ -4 -8 -12 -16 -20 0 5 10 15 20 25 VKA, CATHODE VOLTAGE (nA) Test Circuit for VKA=Vref(1+R1/R2)+R1*Iref 500 400 300 200 100 IK=10mA R1=10KΩ -20 0 20 40 60 Ta, AMBIENT TEMPERATURE 80 Test Circuit for Iref 100 (℃) Off-State Cathode Current versus Ambient Temperature 50 (nA) 40 600 0 -40 Ioff, OFF-STATE CATHODE CURRENT 35 Reference Input Current versus Ambient Temperature 700 Iref, REFERENCE INPUT CURRENT 30 (V) 45 40 35 30 25 20 15 10 VKA=36V 5 0 -40 Vref=0V -20 0 20 40 Ta, AMBIENT TEMPERATURE www.cj-elec.com 60 80 Test Circuit for Ioff 100 (℃) 4 J,Aug,2015 SOT-23 Package Outline Dimensions Symbol A A1 A2 b c D E E1 e e1 L L1 θ Dimensions In Millimeters Min Max 0.900 1.150 0.000 0.100 0.900 1.050 0.300 0.500 0.080 0.150 2.800 3.000 1.200 1.400 2.250 2.550 0.950 TYP 1.800 2.000 0.550 REF 0.300 0.500 0° 8° Dimensions In Inches Min Max 0.035 0.045 0.000 0.004 0.035 0.041 0.012 0.020 0.003 0.006 0.110 0.118 0.047 0.055 0.089 0.100 0.037 TYP 0.071 0.079 0.022 REF 0.012 0.020 0° 8° SOT-23 Suggested Pad Layout www.cj-elec.com 5 J,Aug,2015 SOT-23 Tape and Reel www.cj-elec.com 6 J,Aug,2015