TL431A Adjustable Precision Shunt Regulator FEATURES PIN CONNECTIONS • Programmable Output Voltage to 40V • Low Dynamic Output Impedance 0.2Ω • Sink Current Capability of 0.1 mA to 100 mA • Equivalent Full-Range Temperature Coefficient of 50 ppm/oC • Temperature Compensated for Operation over Full Rated Operating Temperature Range R • Low Output Noise Voltage A K • Fast Turn on Respons • TO-92 or SOT-23 and SOT-89 ,SO8packages SOT-89 K A TL431ACPK R TO-92 R TL431ACLP--Bulk Pack TL431ACLPM-Ammo Pack A K SO8 TL431ACMX A CATHODE ANODE ANODE NC 1 8 2 7 3 6 4 5 REF ANODE ANODE NC SOT-23 TL431ALT1 R K DESCRIPTION The TL431A is a three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between Vref (approximately 2.5 volts) and 36 volts with two external resistors. These devices have a typical dynamic output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacement for zener diodes in many applications. The TL431A is characterized for operation from -0oC to +70oC. SYMBOL FUNCTIONAL BLOCK DIAGRAM ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified) Characteristic Cathode Voltage Symbol Value Unit VKA 40 IK 100 ~ 150 Reference Input Current Range IREF 0.05 ~ 10 mA Power Dissipation at 25oC: TO – 92 Package (R!JA = 178oC/W) SOT – 23 – 3 Package (R!JA = 625oC/W) Junction Temperature Range PD TJ 0.7 0.2 0 ~ 150 W W o C Operating Temperature Range Tg 0 ~ 70 o C -65 ~ +150 o C Cathode Current Range (Continuous) Storage Temperature Range Tstg 1 V mA V TL431A Adjustable Precision Shunt Regulator RECOMMENDED OPERATING CONDITIONS Characteristic Symbol Cathode Voltage VKA Cathode Current IK Test Condition Min Typ REF 0.5 Max Unit 40 V 100 mA ELECTRICAL CHARACTERISTICS (Ta = 25oC, VKA = VREF, IK = 10mA unless otherwise specified) Characteristic Symbol Reference Input Voltage Test Condition Vka=Vref, Ik=10mA VREF Min Typ Max Unit 2.445 2.495 2.545 V VREF(dev) Tmin ≤ Ta ≤ Tmax 3 17 mV ∆V R EF ∆V K A ∆VKA = 10V-VREF -1.4 -2.7 mV/V ∆VKA = 36V- 10V -1.0 -2.0 IREF R1 = 10KΩ, R2 = ∞ 1.8 4 µA Deviation of Reference Input Current Over Full Temperature Range IREF(dev) R1 = 10KΩ, R2 = ∞ 0.4 1.2 µA Minimum Cathode Current for Regulation IK(min) 0.25 0.5 mA Off-State Cathode Current IK(off) VKA = 40V, VREF = 0 0.26 0.9 µA Dynamic Impedance ZKA IK = 10mA to 100 mA , f ≤ 1.0KHz 0.22 0.5 Ω Fig.2. Test Circuit for VKA ≥ VREF Fig.3. Test Circuit for Ioff Deviation of Reference Input Voltage Over Full Temperature Range Ratio of Change in Reference Input Voltage to the Change in Cathode Voltage Reference Input Current TEST CIRCUITS Fig.1. Test Circuit for VKA = VREF IN P U T VKA IN P U T VKA IK IK IN P U T VKA IK (O F F ) R1 IR E F B T 432 B T 432 10n F V R EF R2 V R EF 10n F V K A = V R E F (1+ R 1/R 2)+ IR E F R 1 2 B T 432 TL431A Adjustable Precision Shunt Regulator PAD LAYOUT Y 0,0 X Chip siz e:0,81mmx 0,76 mm Pad siz e : 94 x 94 Unit : µm 2 1 3 PAD LOCATION Unit: µm Pad No. Pad Name Description X Y 1 R Reference -314 -299 2 A Anode -75 -275 3 K Cathode 231 -299 PHYSICAL CHARACTERISTIC Wafes dia Wafes width Scribe width Passivation 100 mm (4") 350 ±20µm 90 µm PSG Ordering Information Grade AA A B Accuracy 0.5% of Typ. 1 % of Typ. 2 % of Typ. Marking TL431AA TL431A TL431 Min. 2.488V 2.475V 2.445V Typ. 2.495V 2.495V 2.495V Max. 2.513V 2.525V 2.545V Notice: Please don't confuse the version of product (-A,-B,-I Suffix) with Grade of product (AA, A). 3 TL431A Adjustable Precision Shunt Regulator 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 4 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 TL431A Adjustable Precision Shunt Regulator Symbol 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 5 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 TL431A Symbol A A1 A2 b c D E E1 e e1 L θ Adjustable Precision Shunt Regulator Dimensions In Millimeters Min Max 1.050 1.250 0.000 0.100 1.050 1.150 0.300 0.500 0.100 0.200 2.820 3.020 1.500 1.700 2.650 2.950 0.950(BSC) 1.800 2.000 0.300 0.600 0° 8° 6 Dimensions In Inches Min Max 0.041 0.049 0.000 0.004 0.041 0.045 0.012 0.020 0.004 0.008 0.111 0.119 0.059 0.067 0.104 0.116 0.037(BSC) 0.071 0.079 0.012 0.024 0° 8° TL431A Symbol A A1 A2 b c D E E1 e L θ Adjustable Precision Shunt Regulator 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° 7 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°