TL431

SMD Type Adjustable Accurate Reference Source TL431 SOT-23 2.9 0.4 0.1 0.1 3 IC Unit: mm Features The output voltage can be adjusted to 36V Low dynamic output impedance, its typical value is 0.2 Trapping current capability is 1 to 100mA The typical value of the equivalent temperature factor in the whole temperature scope is 50 ppm/ The effective temperature compensation in the working 0.1 2.4 1.3 0.1 1 0.95 0.1 0.1 2 0.55 0.4 0.1 +0.05 -0.01 1.9 0.1 0.97 0.1 range of full temperature Low output noise voltage Fast on-state response Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified) Parameter Cathode Voltage Cathode Current Range (Continuous) Reference Input Current Range Power Dissipation Operating Temperature Storage Temperature Range Symbol VKA IKA IREF PD TOPR TSTG 0 -65 -100 0.05 350 70 +150 Rating 37 +150 +10 Unit V mA mA mW Electrical Characteristics (Ta = 25 Parameter Reference Input Voltage Deviation of Reference Input Voltage Over Temperature (*) unless otherwise specified) Symbol VREF VREF/ T Testconditons VKA = VREF , IKA = 10mA VKA = VREF , IKA = 10mA Tmin VREF/ IREF IREF/ IKA(min) IKA(OFF) ZKA T VKA Ta Tmax VKA = 10V VKA = 36V VREF 10V -1.0 -0.5 1.5 0.4 0.45 0.05 0.15 -2.7 -2.0 4 1.2 1.0 1.0 0.5 mV/V mV/V A A mA A Min 2.45 Typ 2.5 4.5 Max 2.55 17 Unit V mV 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 Minimum Cathode Current for Regulation Off-state Cathode Current Dynamic Impedance * TMIN = 0 , TMAX = +70 IKA = 10mA , IKA = 10mA , IKA = 10mA , R1 = 10K IKA = 10mA , R1 = 10K TA = Full Temperature VKA = VREF VKA = 36V, VREF = 0 , R2 = , R2 = VKA = VREF, IKA = 1 to 100mA, 1.0KHz f 0.38 1.Reference 2.Cathode 3.Anode 0 0.1 www.kexin.com.cn 1 SMD Type TL431 Classification Of VREF Rank Range 0.5% 2.487 2.512 2.475 1% 2.525 2.450 2% 2.550 IC Typical Characteristics 800 125 V KA = V REF T A = 25 V KA = V REF T A = 25 Cathode Current (mA) 75 50 25 0 -25 -50 -75 -100 -2 -1 0 1 2 3 Cathode Current ( A) 100 600 400 I KA (MIN) 200 0 -200 -1 0 1 2 3 Cathode Voltage (V) Cathode Voltage (V) Cathode Current vs. Cathode Voltage Change in Reference Input voltage (mV) 0 -5 -10 -15 -20 -25 -30 -35 -40 0 5 10 15 20 25 30 35 40 I KA = 10mA T A = 25 100 70 40 20 Cathode Current vs. Cathode Voltage T A = 25 I KA = 1mA to 100mA Impedance ( ) 10 7 4 2 1 0.7 0.4 0.2 0.1 1K 10K 100K 1M 10M Cathode Voltage (V) Frequency (Hz) Change in Reference Input Voltage vs. Cathode Voltage 70 6 I KA = 10mA T A = 25 Dynamic Impedance Frequency T A = 25 Input and Output Voltage (V) Voltage Amplification (dB) 60 50 40 30 20 10 0 -10 1K 10K 100K INPUT 8 4 3 OUTPUT 2 1 0 1M 10M 0 1 2 3 4 5 6 7 Frequency (Hz) Time ( s) Small Signal Voltage Amplification vs. Frequency Pulse Response 2 www.kexin.com.cn