JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD JC(T CJ431K SOT-23 Encapsulate Adjustable Reference Source Adjustable Accurate Reference Source DEVICE DESCRIPSION The CJ431K 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 Cathode Current Range (Continuous) Symbol Value VKA 37 V -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 Tj 150 ℃ Operating Junction Temperature IKA Unit Operating Ambient Temperature Range Topr -25~+125 ℃ Storage Temperature Range Tstg -65~+150 ℃ www.cj-elec.com 1 J,Aug,2015 ELECTRICAL CHARACTERISTICS (Ta=25℃ unless otherwise specified) Parameter Symbol Reference lnput Voltage (Fig.1) Deviation of Reference Input Voltage Over Temperature (note) (Fig.1) conditions Test Vref VKA=VREF, IKA=10mA Over Full Temperature Range (Fig.2) Minimum Cathode Current for Regulation (Fig.1) Off-state Cathode Current (Fig.3) Dynamic lmpedance V -1.0 -2.7 mV/V -0.5 -2.0 mV/V 1.5 4 μA R2=∞ TA=-25 to 125℃ 0.4 1.2 μA VKA=VREF 0.45 1.0 mA 0.05 0.5 μA 0.15 0.5 Ω IKA=10mA =10V~VREF △VKA =36V~ 10V Deviation Of Reference lnput Current 2.520 mV △VKA IKA= 10mA,R1=10 kΩ lref Unit 17 Voltage (Fig.2) Reference lnput Current (Fig.2) Max 4.5 Tmin≤Ta≤Tmax △Vref /△VKA Typ 2.470 VKA =VREF, IKA =10mA △Vref /△T Ratio Of Change in Reference lnput Voltage to the Change in Cathode Min R2=∞ lKA=10mA, R1=10 kΩ △lref /△T IKA(min) VKA=40V,VREF=0 IKA(OFF) VKA=VREF, lKA=1 to 100mA ZKA f≤1.0kHz Note: TMIN=-25℃ ,TMAX=+125℃ CLASSIFICATION RI Vref Rank 0.5% 1% Range 2.482-2.508 2.47-2.52 Figure 1. Test Circuit for VKA = Vref Input IK VKA Figure 2. Test Circuit for VKA > Vref R1 Vref VKA Input 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 Current versus 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) KA 600 IKA(min) 400 200 ref 0 VKA=Vref -200 Ta=25℃ -1 1 2 VKA, CATHODE VOLTAGE (V) 0 3 Test Circuit for VKA=Vref Reference Input Voltage versus Ambient Temperature Vref, REFERENCE INPUT VOLTAGE (mV) 2600 2550 2500 2450 2400 VKA=Vref 2350 -40 IK=10mA -20 0 20 40 Ta, AMBIENT TEMPERATURE www.cj-elec.com 60 80 100 (℃) 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 (uA) 35 40 Test Circuit for VKA=Vref(1+R1/R2)+R1*Iref Reference Input Current versus Ambient Temperature 3.0 Iref, REFERENCE INPUT CURRENT 30 (V) 2.5 2.0 1.5 1.0 0.5 IK=10mA 0.0 -40 R1=10KΩ -20 0 20 40 60 Ta, AMBIENT TEMPERATURE 80 100 (℃) Test Circuit for Iref Off-State Cathode Current versus Ambient Temperature Ioff, OFF-STATE CATHODE CURRENT (nA) 40 30 20 10 VKA=36V Vref=0V 0 -40 -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