TL431I Adjustable Precision Shunt Regulator (I Grade) 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 • Provided Pb-Free packages from the end of 2004 SOT-89 K A TL431ICPK R TO-92 R A K TL431ICLP SO8 TL431ACMX * ESD tolerance (human body model) 2000V A * Operating Temperature Range -60~+125 •C CATHODE ANODE ANODE NC 1 8 2 7 3 6 4 5 REF ANODE ANODE NC SOT-23 TL431ILT1 R K DESCRIPTION The TL431I 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 40 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 TL431I is characterized for operation from -60oC to +125 oC. SYMBOL FUNCTIONAL BLOCK DIAGRAM ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified) Characteristic Cathode Voltage Symbol Value Unit VKA 42 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 -60 ~+125 o C -65 ~ +150 o C Cathode Current Range (Continuous) Storage Temperature Range Tstg 1 V mA TL431I Adjustable Precision Shunt Regulator (I Grade) 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 Min Typ Max Unit 2.445 2.495 2.545 V 3 17 mV ∆VKA = 10V-VREF -1.4 -2.7 mV/V ∆VKA = 36V- 10V -1.0 -2.0 IREF R1 = 10KΩ, R2 = ∞ 1.5 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) 0.50 1 mA Off-State Cathode Current IK(off) VKA = 42V, VREF = 0 0.05 1.0 µA Dynamic Impedance ZKA IK = 10mA to 100 mA , f ≤ 1.0KHz 0.15 0.5 Ω Reference Input Voltage Test Condition VREF Deviation of Reference Input Voltage Over Full Temperature Range Tmin ≤ Ta ≤ Tmax VREF(dev) Vka=Vref, Ik=10mA ∆V R EF ∆V K A Ratio of Change in Reference Input Voltage to the Change in Cathode Voltage Reference Input Current 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,-I,-B Suffix) with Grade of product (AA,A,B). TEST CIRCUITS Fig.2. Test Circuit for VKA ≥ VREF Fig.1. Test Circuit for VKA = VREF IN P U T VKA IN P U T VKA IK IK Fig.3. Test Circuit for Ioff IN P U T VKA IK (O F F ) R1 IR E F B T 432 B T 432 R2 V R EF V R EF V K A = V R E F (1+ R 1/R 2)+ IR E F R 1 2 B T 432 TL431I Adjustable Precision Shunt Regulator (I Grade) BONDING DIAGRAM 2 1 3 Cathod Ref Anode Ch i p si ze: 0, 62x 0, 82 Pad si ze : 80 x 80 Unit : µm PAD LOCATION Pad No. Pad Name Description X Y 2 A Anode 472 672 3 K Cathode 68 672 1 R Reference 94 244.5 PHYSICAL CHARACTERISTIC Wafes dia Wafes width Scribe width Passivation Backside metallization 100 mm (4") 280 ±20µm 80 µm PSG Without metallization Fig. 1 Maximum Power Dissipation 3 TL431I Adjustable Precision Shunt Regulator (I Grade) Fig. 2 Small Signal Voltage Amplification vs. Frequency Fig. 3 Pulse Response 4 TL431I Adjustable Precision Shunt Regulator (I Grade) 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 5 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 TL431I Adjustable Precision Shunt Regulator (I Grade) 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 6 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 TL431I Symbol A A1 A2 b c D E E1 e e1 L θ Adjustable Precision Shunt Regulator (I Grade) 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° 7 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° TL431I Adjustable Precision Shunt Regulator (I Grade) Symbol 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° 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°