TL431U

Encapsulate Adjustable Reference Source SOT-89 TL431U Adjustable Accurate Reference Source SOT-89 FEATURES z z z z The output voltage can be adjusted to 36V Low dynamic output impedance ,its typical value is 0.2Ω Trapping current capability is 1 to 100mA The typical value of the equivalent temperature factor in the whole temperature scope is 50 ppm/ ℃ z The effective temperature compensation in the working range of full temperature z Low output noise voltage z Fast on -state response 1.REFERENCE 1 2.ANODE 2 3 3.CATHODE MARKING: 431 ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unlessotherwise specified) Parameter Cathode Voltage Cathode Current Range (Continuous) Reference lnput Current Range Power Dissipation Thermal Resistance from Junction to Ambient Symbol VKA IKA Iref PD RθJA Operating Ambient Temperature Range Topr Value 37 -100-+150 0.05-+10 500 250 -25~+85 Storage temperature Range Tstg -65-+150 Operating JunctionTemperature Tj 150 Unit V mA mA mW ℃/W ℃ ℃ ℃ ELECTRICAL CHARACTERISTICS (Ta=25 ℃ unless otherwise specified) Parameter Reference input voltage Deviation of reference Input voltage over temperature (note) Ratio of change in reference lnput 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 Symbol Typ Max 2.475 2.5 2.525 4.5 17 mV -1.0 -2.7 mV/V -0.5 -2.0 mV/V 1.5 4 μA lKA=10mA, R1=10kΩ R2=∞ TA=-25 to 85℃ 0.4 1.2 μA IKA(min) VKA=VREF 0.45 1.0 mA IKA(OFF) VKA=36V ,VREF=0 VKA=VREF, lKA=1 to 100mA f≤1.0kHz 0.05 1.0 μA 0.15 0.5 Ω △Vref /△T △Vref /△VKA lref △lref /△T ZKA conditions U nit Min Vref Test VKA=VREF, IKA=10mA VKA =VREF, IKA =10mA TMIN≤Ta≤TMAX △VKA =10V~VREF IKA=10mA △VKA =36V~10V IKA= 10mA,R1=10kΩ R2=∞ V Note:TMIN=℃ ,TMAX=+℃ CLASSIFICATION of Vref Rank Range Page 1 of 4 0.5% 2.487-2.513 1% 2.475-2.525 4/8/2013 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 KA IK, CATHODE CURRENT (uA) 700 600 500 IKA(min) 400 300 200 100 ref 0 VKA=Vref -100 -200 -1.0 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 Reference Input Voltage versus Ambient Temperature Vref, REFERENCE INPUT VOLTAGE (mV) 2525 2500 2475 2450 VKA=Vref 2425 -40 IK=10mA -20 0 20 40 Ta, AMBIENT TEMPERATURE Page 2 of 4 60 80 100 (℃ ) 4/8/2013 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 30 35 40 Test Circuit for VKA=Vref(1+R1/R2)+R1*Iref (V) Reference Input Current versus Ambient Temperature Iref, REFERENCE INPUT CURRENT (uA) 1.50 1.25 1.00 0.75 0.50 0.25 IK=10mA 0.00 -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) 100 80 60 40 20 VKA=36V Vref=0V 0 -40 -20 0 20 40 Ta, AMBIENT TEMPERATURE Page 3 of 4 60 (℃) 80 100 Test Circuit for Ioff 4/8/2013 SOT-89 PACKAGE OUTLINE Page 4 of 4 4/8/2013