TL431A

TL431A Adjustable Accurate Reference Source SOT-23 Features The output voltage can be adjusted to 36V 2.9 0.1 0.4 0.1 Trapping current capability is 1 to 100mA 0.4 Unit: mm Low dynamic output impedance, its typical value is 0.2 1 The effective temperature compensation in the working 2 0.95 range of full temperature 0.55 2.4 whole temperature scope is 50 ppm/ 1.3 0.1 0.1 3 The typical value of the equivalent temperature factor in the 0.1 0.1 1.9 +0.05 -0.01 0.1 0.1 Low output noise voltage 0.1 0.38 0 0.1 0.97 Fast on-state response 1.Reference 2.Cathode 3.Anode Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified) Symbol Rating Unit Cathode Voltage Parameter VKA 37 V Cathode Current Range (Continuous) IKA -100 Reference Input Current Range IREF 0.05 Power Dissipation PD TOPR Storage Temperature Range TSTG -25~ mW +85 -65 +150 unless otherwise specified) Parameter Symbol Reference Input Voltage Testconditons VREF Deviation of Reference Input Voltage Over Temperature mA +10 350 Operating Temperature Electrical Characteristics (Ta = 25 mA +150 VKA = VREF , IKA = 10mA VREF/ (*) T VKA = VREF , IKA = 10mA Tmin Ratio of Change in Reference Input Voltage to the Change in Cathode Voltage VREF/ Reference Input Current VKA IREF Deviation of Reference Input Current IREF/ Over Full Temperature Range T Ta Min Typ Max Unit 2.45 2.5 2.55 V 4.5 17 mV Tmax 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 Classification Of VREF Rank Range www.slkormicro.com 0.5% 2.487 2.512 1% 2.475 2% 2.525 2.450 1 2.550 TL431A Typical Characteristics 800 V KA = V REF T A = 25 V KA = V REF T A = 25 100 600 Cathode Current ( A) Cathode Current (mA) 125 75 50 25 0 -25 -50 I KA (MIN) 400 200 0 -75 -200 -100 -2 0 -1 1 3 2 0 -1 I KA = 10mA T A = 25 T A = 25 I KA = 1mA to 100mA 40 -10 20 -15 10 7 -20 -25 -30 4 2 1 0.7 0.4 -35 0.2 0.1 -40 0 5 10 15 20 30 25 35 10K 1K 40 100K 10M 1M Frequency (Hz) Cathode Voltage (V) Change in Reference Input Voltage vs. Cathode Voltage Dynamic Impedance Frequency 70 6 I KA = 10mA T A = 25 60 T A = 25 Input and Output Voltage (V) Voltage Amplification (dB) 3 2 Cathode Current vs. Cathode Voltage 100 70 Impedance ( ) Change in Reference Input voltage (mV) Cathode Current vs. Cathode Voltage 0 -5 1 Cathode Voltage (V) Cathode Voltage (V) 50 40 30 20 10 0 INPUT 8 4 3 OUTPUT 2 1 0 -10 10K 1K 100K 1M 0 10M Small Signal Voltage Amplification vs. Frequency www.slkormicro.com 1 2 3 Time ( Frequency (Hz) 4 s) Pulse Response 2 5 6 7