CJ431B

JIANGSU CHANGJING ELECTRONICS TECHNOLOGY CO., LTD SOT-23 Encapsulate Adjustable Reference Source CJ431B Adjustable Accurate Reference Source DEVICE DESCRIPSION The CJ431B is a three-terminal adjustable shunt regulators with a specified thermal stability. The output voltage may be set to any value between Vref (approx. 2.5V) and 36V with two external resistors. The active output circuitry provides a very sharp turn on characteristic making these devices an excellent replacement for zener diodes in many applications. SOT-23 1. REFERENCE 2. CATHODE 3. ANODE FEATURES z On-wafer Vref trimming ± 0.3% z z z z z z z z z z 95% chips after packaging have Vrefaccuracy ±0.5% Low Dynamic output impedance 0.1Ω (Typ) Adjustable output voltage Fast turn-on response Sink current capability of 0.1mA to 100mA Low output noise Industrial temperature range Improved temperature compensation Excellent temperature coefficient 25ppm /°C Electrostatic discharge voltage 2.5kV APPLICATION z z z Shunt Regulator High-Current Shunt Regulator Precision Current Limiter ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified) Parameter Symbol Value Unit VKA 40 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 Lead Temperature (1.6mm aside from the case, 10 seconds) TLead 260 ℃ Cathode Voltage Operating Ambient Temperature Range Storage temperature Range Tj -40~+125 ℃ Tstg -65~+150 ℃ ESD (HB M) VESD 2.5 kV www.jscj-elec.com 1 Rev. - 2.0 ELECTRICAL CHARACTERISTICS (Ta=25℃ unless otherwise specified) Parameter Test Symbol Reference input voltage (Fig.1) Deviation of reference input voltage over temperature (note) (Fig.1) conditions Min Typ Max Unit 2.483 2.49 5 2.508 V 8 17 mV -1.0 -2.7 mV/V -0.4 -2.0 mV/V 0.5 1.2 μA R2=∞ TA = full range 0.4 1.2 μA VKA=VREF 0.08 0.3 mA VKA=36V,VREF=0 0.01 0.8 μA 0.1 0.37 Ω Vref VKA=VREF, IKA=10mA △Vref /△T VKA =VREF, IKA =10mA TMIN≤Ta≤TMAX △VKA Ratio of change in reference input voltage to the change in cathode △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=0.2 to 100mA ZKA f≤1.0kHz Note: TMIN=-25℃ ,TMAX=+125℃ CLASSIFICATION RI Vref Rank  0.5% Range 2.483-2.508 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.jscj-elec.com 2 Rev. - 2.0 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.jscj-elec.com 3 Rev. - 2.0 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 15 10 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.jscj-elec.com 60 80 Test Circuit for Ioff 100 (℃) 4 Rev. - 2.0 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.jscj-elec.com 5 Rev. - 2.0 SOT-23 Tape and Reel www.jscj-elec.com 6 Rev. - 2.0 DISCLAIMER IMPORTANT NOTICE, PLEASE READ CAREFULLY The information in this data sheet is intended to describe the operation and characteristics of our products. JSCJ has the right to make any modification, enhancement, improvement, correction or other changes to any content in this data sheet, including but not limited to specification parameters, circuit design and application information, without prior notice. Any person who purchases or uses JSCJ products for design shall: 1. Select products suitable for circuit application and design; 2. Design, verify and test the rationality of circuit design; 3. Procedures to ensure that the design complies with relevant laws and regulations and the requirements of such laws and regulations. JSCJ makes no warranty or representation as to the accuracy or completeness of the information contained in this data sheet and assumes no responsibility for the application or use of any of the products described in this data sheet. 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