TL431

TL431 Precision adjustable shunt regulator Device Descripsion K The TL431 is a three-terminal adjustable shunt regulator A offering excellent temperature stability. This. device has a typical dynamic output impedance of 0.2Ω. The device can be used as a replacement for zener diodes in many applications. R R A TO--92 K R A K SOT-89 FEATURES Applications Shunt Regulator High-Current Shunt Regulator Precision Current Limiter ｏｒ 7 3 6 4 5 ｃｔ 8 2 REF ANODE ANODE NC SOT-23 A R K FUNCTIONAL BLOCK DIAGRAM ｅｍ SYMBOL 1 ＭＩ ＣＲ Ｏ 　Ｓ z z z ｉｃ factor in the whole temperature scope is 50 ppm/℃ CATHODE ANODE ANODE NC ｄｕ z SOP-8 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 Low output noise voltage Fast on -state response The effective temperature compensation in the working range of full temperature The typical value of the equivalent temperature ｏｎ z z z z z z ＪＳ Limiting Values (Absolute Maximum Rating) Parameter Symbol Value Unit Cathode Voltage VKA 37 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 Operating Junction Temperature Tj 150 ℃ Operating Ambient Temperature Range Topr -25~+85 ℃ Tstg -65~+150 ℃ Storage temperature Range ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ 第１／８页 TL431 Precision adjustable shunt regulator Electrical Characteristics (TA=25℃ unless otherwise noted) Symbol Deviation of reference input voltage over temperature (note) (Fig.1) Vref VKA=VREF, IKA=10mA △Vref /△T VKA =VREF, IKA =10mA TMIN≤Ta≤TMAX △Vref /△VKA IKA=10mA voltage (Fig.2) Minimum cathode current for Dynamic impedance ｄｕ R2=∞ TA=-25 to 85℃ VKA=VREF VKA=36V,VREF=0 IKA(OFF) VKA=VREF, lKA=1 to 100mA f≤1.0kHz ｅｍ ＭＩ ＣＲ ＪＳ △lref /△T VKA 17 mV -1.0 -2.7 mV/V -0.5 -2.0 mV/V 1.5 4 μA 0.4 1.2 μA 0.45 1.0 mA 0.05 1.0 μA 0.15 0.5 Ω 1% 2.475-2.525 2.487-2.513 Figure 1. Test Circuit for VKA = Vref Vref 4.5  0.5% Range IK V Ｏ　 Ｓ Note: TMIN=-25℃ ,TMAX=+85℃ Rank 2.525 lKA=10mA, R1=10kΩ ZKA CLASSIFICATION RI Vref 2.5 ｉｃ Off-state cathode Current (Fig.3) Input R2=∞ IKA(min) regulation (Fig.1) 2.475 ｏｎ over full temperature range (Fig.2) Unit △VKA IKA= 10mA,R1=10kΩ lref Deviation Of reference input current Max =10V~VREF =36V~ 10V Reference input current (Fig.2) Typ △VKA Ratio of change in reference input voltage to the change in cathode Min ｏｒ Reference input voltage (Fig.1) conditions Test ｃｔ Parameter Figure 2. Test Circuit for VKA > Vref VKA Input R1 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．ｊｓｍｓｅｍｉ．ｃｏｍ 第２／８页 TL431 Precision adjustable shunt regulator Typical Characteristics Cathode Voltage 100 ｏｒ 50 0 ｃｔ IK, CATHODE CURRENT (mA) 150 -50 VKA=Vref Ta=25℃ -1 0 1 2 VKA, CATHODE VOLTAGE 3 (V) Cathode Current versus Cathode Voltage 800 IKA(min) ｅｍ 400 300 200 100 0 ref VKA=Vref -100 Ta=25℃ -0.5 0.0 0.5 1.0 1.5 ＭＩ ＣＲ -200 -1.0 KA KA ｉｃ 600 Ｏ　 Ｓ IK, CATHODE CURRENT (uA) 700 500 ｄｕ -2 ｏｎ -100 2.0 2.5 3.0 (V) Test Circuit for VKA=Vref ＪＳ VKA, CATHODE VOLTAGE ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ 第３／８页 TL431 Precision adjustable shunt regulator Typical Characteristics Change in Reference Input Voltage versus Cathode Voltage 0 (mV) IK=10mA Ta=25℃ △Vref, REFERENCE INPUT VOLTAGE -4 ｏｒ -8 ｃｔ -12 -16 -20 10 15 20 25 VKA, CATHODE VOLTAGE 40 ｅｍ 500 400 200 100 Ｏ　 Ｓ 300 0 -40 IK=10mA 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) ＪＳ 50 Test Circuit for VKA=Vref(1+R1/R2)+R1*Iref ｉｃ 600 ＭＩ ＣＲ (nA) 35 (V) Reference Input Current versus Ambient Temperature 700 Iref, REFERENCE INPUT CURRENT 30 ｄｕ 5 ｏｎ 0 45 40 35 30 25 20 15 10 VKA=36V 5 0 -40 Vref=0V -20 0 20 40 Ta, AMBIENT TEMPERATURE 60 80 100 Test Circuit for Ioff (℃ ) ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ 第４／８页 TL431 Precision adjustable shunt regulator Package Outline Dimensions SOT-23 Suggested Pad Layout ＪＳ ＭＩ ＣＲ Ｏ　 Ｓ ｅｍ ｉｃ ｏｎ ｄｕ ｃｔ ｏｒ SOT-23 ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ 第５／８页 TL431 Precision adjustable shunt regulator Package Outline Dimensions ＪＳ Ｍ ＩＣ ＲＯ 　 Ｓｅ ｍｉ ｃｏ ｎｄ ｕｃ ｔｏ ｒ TO-92 Symbol A A1 b c D D1 E e e1 L Φ h Dimensions In Millimeters Min Max 3.300 3.700 1.100 1.400 0.380 0.550 0.360 0.510 4.400 4.700 3.430 4.300 4.700 1.270 TYP 2.440 2.640 14.100 14.500 1.600 0.000 0.380 ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ Dimensions In Inches Min Max 0.130 0.146 0.043 0.055 0.015 0.022 0.014 0.020 0.173 0.185 0.135 0.169 0.185 0.050 TYP 0.096 0.104 0.555 0.571 0.063 0.000 0.015 第６／８页 TL431 Precision adjustable shunt regulator Package Outline Dimensions ＩＣ ＲＯ 　 Ｓｅ ｍｉ ｃｏ ｎｄ ｕｃ ｔｏ ｒ SOT-89 Symbol ＪＳ Ｍ A b b1 c D D1 E E1 e e1 L Dimensions In Millimeters Min Max 1.400 1.600 0.320 0.520 0.400 0.580 0.350 0.440 4.400 4.600 1.550 REF 2.300 2.600 3.940 4.250 1.500 TYP 3.000 TYP 0.900 1.200 ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ Dimensions In Inches Min Max 0.055 0.063 0.013 0.197 0.016 0.023 0.014 0.017 0.173 0.181 0.061 REF 0.091 0.102 0.155 0.167 0.060TYP 0.118TYP 0.035 0.047 第７／８页 TL431 Precision adjustable shunt regulator Package Outline Dimensions ＩＣ ＲＯ 　 Ｓｅ ｍｉ ｃｏ ｎｄ ｕｃ ｔｏ ｒ SOP-8 Symbol ＪＳ Ｍ A A1 A2 b c D E E1 e L θ Dimensions In Millimeters Min Max 1.350 1.750 0.100 0.250 1.350 1.550 0.330 0.510 0.170 0.250 4.700 5.100 3.800 4.000 5.800 6.200 1.270(BSC) 0.400 1.270 0° 8° ｗｗｗ．ｊｓｍｓｅｍｉ．ｃｏｍ Dimensions In Inches Min Max 0.053 0.069 0.004 0.010 0.053 0.061 0.013 0.020 0.006 0.010 0.185 0.200 0.150 0.157 0.228 0.244 0.050(BSC) 0.016 0.050 0° 8° 第８／８页