DIP Ty p e IC Adjustable Accurate Reference Source TL431 (KL431) TO-92 Unit:mm 4.8 ± 0.3 3.8 ± 0.3 The output voltage can be adjusted to 36V 2.3 Max Low dynamic output impedance, its typical value is 0.2 Trapping current capability is 1 to 100mA 0.7 0.60 Max The typical value of the equivalent temperature factor in the 0.45 ± 0.1 whole temperature scope is 50 ppm/ The effective temperature compensation in the working 1 2 12.7 Min 5.0 ± 0.2 Features 0.5 3 range of full temperature Low output noise voltage Fast on-state response 1.Reference 2.Anode 3.Cathode 1.27 2.54 Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified) Parameter Symbol Rating Cathode Voltage VKA 37 Cathode Current Range (Continuous) IKA -100 +150 mA Reference Input Current Range IREF 0.05 +10 mA Power Dissipation PD TOPR 0 Storage Temperature Range TSTG -65 Parameter Reference Input Voltage Over Temperature (*) Ratio of Change in Reference Input Voltage to the Change in Cathode Voltage Reference Input Current Deviation of Reference Input Current Over Full Temperature Range mW 70 +150 unless otherwise specified) Symbol Deviation of Reference Input Voltage V 770 Operating Temperature Electrical Characteristics (Ta = 25 Unit Testconditons VKA = VREF , IKA = 10mA VREF VREF/ VREF/ T VKA IREF IREF/ T VKA = VREF , IKA = 10mA Tmin Ta Tmax Min Typ Max Unit 2.45 2.5 2.55 V 4.5 17 mV IKA = 10mA , VKA = 10V VREF -1.0 -2.7 mV/V IKA = 10mA , VKA = 36V 10V -0.5 -2.0 mV/V 1.5 4 A 0.4 1.2 A IKA = 10mA , R1 = 10K , R2 = IKA = 10mA , R1 = 10K , R2 = TA = Full Temperature Minimum Cathode Current for Regulation IKA(min) VKA = VREF 0.45 1.0 mA Off-state Cathode Current IKA(OFF) VKA = 36V, VREF = 0 0.05 1.0 A VKA = VREF, IKA = 1 to 100mA, f 1.0KHz 0.15 0.5 Dynamic Impedance * TMIN = 0 ZKA , TMAX = +70 www.kexin.com.cn 1 DIP Ty p e IC TL431 (KL431) Classification Of VREF Rank 0.3﹪ 0.5﹪ 1﹪ 2﹪ Rangfe 2.493~2.508 2.487~2.512 2.475~2.525 2.450~2.550 ■ Typical Characterisitics (mA) 150 IK, CATHODE CURRENT Cathode Current versus Cathode Voltage 100 50 0 -50 V KA =V ref T a =25 ℃ -100 -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 ref V KA =V ref -100 T a =25 ℃ -200 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 VKA, CATHODE VOLTAGE 2.5 3.0 (V) Reference Input Voltage versus Ambient Temperature 2525 Vref, REFERENCE INPUT VOLTAGE (mV) Test Circuit for VKA=V ref 2500 2475 2450 V KA =V ref I K =10mA 2425 -40 -20 0 20 40 Ta, AMBIENT TEMPERATURE 2 www.kexin.com.cn 60 (℃) 80 100 IC DIP Type TL431 (KL431) ■ Typical Characterisitics Change in Reference Input Voltage versus Cathode Voltage 0 △Vref, REFERENCE INPUT VOLTAGE (mV) I K =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 1.50 Iref, REFERENCE INPUT CURRENT 30 (V) 1.25 1.00 0.75 0.50 0.25 IK =10mA 0.00 -40 -20 0 20 40 60 Ta, AMBIENT TEMPERATURE 80 100 (℃) Test Circuit for I ref Off-State Cathode Current versus Ambient Temperature Ioff, OFF-STATE CATHODE CURRENT (nA) 40 35 30 25 20 15 10 V KA =36V 5 V ref=0V 0 -40 -20 0 20 40 Ta, AMBIENT TEMPERATURE 60 (℃) 80 100 Test Circuit for I off www.kexin.com.cn 3