TL431

TL431A FEATURES Adjustable Precision Shunt Regulator 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 K A TO-92 SOT-89 TL431ACPK R TL431ACLP--Bulk Pack TL431ACLPM-Ammo Pack R A K SO8 TL431ACMX A SOT-23 TL431ALT1 CATHODE ANODE ANODE NC 1 2 3 4 8 7 6 5 REF ANODE ANODE NC 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 Cathode Current Range (Continuous) Reference Input Current Range Power Dissipation at 25oC: TO – 92 Package (R!JA = 178oC/W) SOT – 23 – 3 Package (R!JA = 625oC/W) Junction Temperature Range Operating Temperature Range Storage Temperature Range Symbol VKA IK IREF PD 0.7 0.2 0 ~ 150 0 ~ 70 -65 ~ +150 W W o C o o Value 40 100 ~ 150 0.05 ~ 10 Unit V mA mA TJ Tg Tstg C C 1 V TL431A Characteristic Cathode Voltage Cathode Current Symbol VKA IK Adjustable Precision Shunt Regulator Test Condition Min REF RECOMMENDED OPERATING CONDITIONS Typ Max 40 100 Unit V mA 0.5 ELECTRICAL CHARACTERISTICS (Ta = 25oC, VKA = VREF, IK = 10mA unless otherwise specified) Characteristic Reference Input Voltage 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 Deviation of Reference Input Current Over Full Temperature Range Minimum Cathode Current for Regulation Off-State Cathode Current Dynamic Impedance Symbol VREF VREF(dev) Test Condition Vka=Vref, Ik=10mA Min 2.445 Typ 2.495 3 Max 2.545 17 Unit V mV Tmin ≤ Ta ≤ Tmax ∆V R EF ∆V K A IREF IREF(dev) ∆VKA = 10V-VREF ∆VKA = 36V- 10V R1 = 10KΩ, R2 = ∞ R1 = 10KΩ, R2 = ∞ -1.4 -1.0 1.8 0.4 -2.7 -2.0 4 1.2 mV/V µA µA IK(min) IK(off) ZKA VKA = 40V, VREF = 0 IK = 10mA to 100 mA , f ≤ 1.0KHz 0.25 0.26 0.22 0.5 0.9 0.5 mA µA Ω TEST CIRCUITS Fig.1. Test Circuit for VKA = VREF Fig.2. Test Circuit for VKA ≥ VREF Fig.3. Test Circuit for Ioff IN P U T VKA IN P U T VKA IN P U T VKA IK IK R1 IR E F B T 432 10n F R2 V R EF IK (O F F ) B T 432 V R EF B T 432 10n F V K A = V R E F (1+ R 1/R 2)+ IR E F R 1 2 TL431A PAD LAYOUT Adjustable Precision Shunt Regulator Y 0,0 X C hip siz e:0,81 mm x 0,76 m m Pad siz e : 94 x 94 Unit : µm 1 2 3 PAD LOCATION Unit: µm Pad No. 1 2 3 Pad Name R A K Description Reference Anode Cathode X Y -314 -75 231 -299 -275 -299 PHYSICAL CHARACTERISTIC W afes dia W afes 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 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 4 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 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 5 TL431A Adjustable Precision Shunt Regulator Symbol A A1 A2 b c D E E1 e e1 L θ Dimensions In Millimeters M in 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° 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° 6 TL431A Adjustable Precision Shunt Regulator Symbol A A1 A2 b c D E E1 e L θ Dimensions In Millimeters M in 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° 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° 7