TS431 LOW VOLTAGE ADJUSTABLE SHUNT REFERENCE ■ LOW VOLTAGE OPERATION : 1.24 TO 6V ■ 2%, 1% AND 0.5% VOLTAGE PRECISION ■ WIDE OPERATING RANGE CATHODE ■ ■ ■ ■ CURRENT : 60µA TO 30mA LOW OUTPUT IMPEDANCE : 0.2Ω TYPICALLY STABLE FOR ANY CAPACITIVE LOADS ESD PROTECTION : 2kV (Human Body Model) 200V (Machine Model) 100ppm/°C TEMPERATURE COEFFICIENT Z TO92 (Plastic Package) L SOT23-5 (Plastic Micropackage) DESCRIPTION The TS431 is a low voltage three terminals programmable shunt Voltage Reference. The output voltage can be set to any value between Vref (1.24V) and 6V with two external resistors. The TS431 is able to operate at a lower voltage (1.24V) and lower cathode current than the widespread TL431 and TL1431 shunt voltage reference. When driving an optocoupler, the TS431 is particularly interesting to regulate 3.3V switching power supplies. ORDER CODE Part Number Temperature Range TS431I TS431AI TS431BI -40°C, +125°C Package Z L • • • • • • SOT-23 Marking L272 L271 L270 Z = TO92 Plastic package - also available in Bulk (Z), Tape & Reel (ZT) and Ammo Pack (AP) LT = Tiny Package (SOT23-5) - only available in Tape & Reel (LT) PIN CONNECTIONS (top view) TO92 (Top view) April 2002 SOT23-5 (Top view) 1/9 TS431 ABSOLUTE MAXIMUM RATINGS Symbol VKA Parameter Cathode to Anode Voltage Value Unit 10 V Ik Continuous Cathode Current Range -20 to +40 mA Iref Reference Input Current Range -0.05 to +3 mA 625 500 mW -65 to +150 °C Pd Power Dissipation Tstd Storage Temperature Range 1) TO92 package SOT23-5 package 1. Tjunction=150°C, Tamb =25°C with RTHj-a=200°C/W for TO92 package and R THj-a=250°C/W for SOT23-5L package OPERATING CONDITIONS Symbol VKA Ik Toper Parameter Cathode to Anode Voltage Cathode Current Operating Free Air Temperature Range Value Unit 1.24 to 6 V 0.06 to 30 mA -40 to +125 °C ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified) Symbol Vref ∆Vref Parameter Output Voltage VKA = Vref @ Ik = 100µA Output Voltage Change 1) 2) Ik = 100µA, VKA = Vref Test Condition Min. Typ. Max. Unit TS431 TS431A TS431B 0 < Tamb < +70°C -40 < Tamb < +85°C -40 < Tamb < +105°C -40 < Tamb < +125°C 1.215 1.228 1.234 1.240 1.265 1.252 1.246 V 9 16 18 21 mV Ratio of Change in Reference Input Voltage to Change in Cathode to Anode Voltage IK = 10mA VKA = 6V to Vref 1.8 2.7 mV/V Reference Input Current IK = 10mA 70 160 nA ∆Iref Reference Input Current Deviation Over Temperature Range IK=10mA R1=10kΩ R2=∝ -40 < Tamb < +85°C -40 < Tamb < +125°C 70 90 160 240 nA Imin Minimum Cathode Current for Regulation VKA = Vref 40 60 µA 0.001 0.1 µA 0.2 0.4 Ω ∆V ref ---------------∆Vka Iref Ioff RKA Off-State Cathode Current VKA = 6V , Vref = 0 Static Impedance VKA = Vref, IK = 0.1 to 15mA 1. Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design. 2. ∆Vref is defined as the difference between the maximum and minimum values obtained over the full temperature range. ∆Vref = Vref max. - Vref min. Vref max. Vref min. T1 2/9 T2 Temperature TS431 Reference voltage vs temperature Test circuit for Vka = Vref 1.252 Vka = Vref Ik = 100 µA Reference voltage (V) 1.248 Input Output 1.244 Ik 1.24 Vka 1.236 Vref 1.232 1.228 -40 -20 0 20 40 60 80 100 120 Temperature (°C) Cathode voltage vs cathode current Cathode voltage vs cathode current 1.5 15 Ika Cathode current (mA) Vka Cathode voltage (V) Vka = Vref T = 25°C 10 5 0 -5 1 0.5 +125°C +25°C -40°C -10 0 -15 -1 -0.5 0 0.5 1 0 1.5 10 20 30 40 50 60 Ika Cathode current (µA) Vka Cathode voltage (V) Reference input current vs temperature Static impedance vs temperature 0.4 100 Ik = 10mA R1 = 10 KΩ R2 = + ∞ 80 Rka Static Impedance (Ohms) Iref Reference current (nA) +85°C 60 40 20 0 0.3 Vka = Vref Ik = 100µA to 15mA 0.2 0.1 0 -40 -20 0 20 40 60 Temperature (°C) 80 100 120 -40 -20 0 20 40 60 80 100 120 Temperature (°C) 3/9 TS431 Off-State current vs temperature Test circuit for Off-State current measurement IOff Off-State current (nA) 200 Input 150 Vka=6V Ioff 100 50 0 -40 -20 0 20 40 60 80 100 120 Temperature (°C) Ratio of change in reference input voltage (mV/V) Ratio of change in reference input voltage to change in Vka voltage vs temperature Test circuit for Vka > Vref 0 Input Vka Ik -1 R1 Iref Ik = 10mA Vka = 6V to Vref -2 R2 -3 Vref Vka = Vref . (1+R1/R2) + Iref . R1 -40 -20 0 20 40 60 80 100 120 Temperature (°C) Phase and Gain vs frequency 60 Test circuit for phase and gain measurement 150 Phase 50 100 10µF 20 Gain 10 1E+4 1E+5 Frequency (Hz) 4/9 0 Phase (°) 30 0 1E+3 Output 50 Phase margin # 50° Gain (dB) 40 6.8K Ik=100µA 10µF -50 Input -100 -150 1E+6 4.3K Vref TS431 Pulse response at Ik=100µA Test circuit for pulse response at Ik = 100µA Input voltage 18KΩ Ik=100µA Pulse Generator f=100KHz Output voltage Output 2 Intput input and output voltage (V) 3 50Ω 1 0 0 1 2 3 4 5 6 7 8 9 10 Time (µs) Pulse response at Ik = 1mA Test circuit for pulse response at Ik = 1mA Input voltage 1.8KΩ Ik=1mA Pulse Generator f=100KHz Output voltage 50Ω Output 2 Intput input and output voltage (V) 3 1 0 0 1 2 3 4 5 6 7 Time (µs) Equivalent input noise vs frequency Equivalent input noise (nv/VHz) 250 200 150 Vka = Vref Ik = 100 µA T=25°C 100 50 0 0.1 1 10 100 1000 Frequency (KHz) 5/9 TS431 PACKAGE MECHANICAL DATA 3 PINS - PLASTIC PACKAGE TO92 (TAPE & REEL) A1 P T P A H W2 W W1 W0 H0 I1 H L1 H1 d D0 F1 F2 P2 P0 Millimeters Inches Dim. Min AL A T d I1 P PO P2 F1/F2 ∆h ∆P W W0 W1 W2 H H0 H1 DO L1 6/9 Typ. Max. Min. Typ. 5.0 5.0 4.0 0.197 0.197 0.157 0.45 2.5 11.7 12.4 5.95 2.4 -1 -1 17.5 5.7 8.5 12.7 12.7 6.35 2.5 0 0 18.0 6 9 15.5 16 3.8 4.0 Max. 0.018 13.7 13 6.75 2.8 1 1 19.0 6.3 9.75 0.5 20 16.5 25 4.2 11 0.098 0.461 0.488 0.234 0.094 -0.039 -0.039 0.689 0.224 0.335 0.500 0.500 0.250 0.098 0 0 0.709 0.236 0.354 0.610 0.630 0.150 0.157 0.539 0.512 0.266 0.110 0.039 0.039 0.748 0.248 0.384 0.020 0.787 0.650 0.984 0.165 0.433 TS431 PACKAGE MECHANICAL DATA 3 PINS - PLASTIC PACKAGE TO92 (TAPE AMMO PACK) A1 P T P A H W2 W W1 W0 H0 I1 H L1 H1 d D0 F1 F2 P2 P0 Millimeters Inches Dim. Min AL A T d I1 P PO P2 F1/F2 ∆h ∆P W W0 W1 W2 H H0 H1 DO L1 Typ. Max. Min. Typ. 5.0 5.0 4.0 0.197 0.197 0.157 0.45 2.5 11.7 12.4 5.95 2.4 -1 -1 17.5 5.7 8.5 12.7 12.7 6.35 2.5 0 0 18.0 6 9 15.5 16 3.8 4.0 Max. 0.018 13.7 13 6.75 2.8 1 1 19.0 6.3 9.75 0.5 20 16.5 25 4.2 11 0.098 0.461 0.488 0.234 0.094 -0.039 -0.039 0.689 0.224 0.335 0.500 0.500 0.250 0.098 0 0 0.709 0.236 0.354 0.610 0.630 0.150 0.157 0.539 0.512 0.266 0.110 0.039 0.039 0.748 0.248 0.384 0.020 0.787 0.650 0.984 0.165 0.433 7/9 TS431 PACKAGE MECHANICAL DATA 3 PINS - PLASTIC PACKAGE TO92 (BULK) Millimeters Inches Dim. Min L B O1 C K O2 a 8/9 3.2 4.45 4.58 12.7 0.407 0.35 Typ. Max. Min. 1.27 3.7 5.00 5.03 4.2 5.2 5.33 0.5 0.508 0.126 0.1752 0.1803 0.5 0.016 0.0138 Typ. Max. 0.05 0.1457 0.1969 0.198 0.1654 0.2047 0.2098 0.0197 0.02 TS431 PACKAGE MECHANICAL DATA 5 PINS - TINY PACKAGE (SOT23-5) A E A2 E D D1 B A1 L C F Millimeters Inches Dimensions A A1 A2 B C D D1 e E F L K Min. Typ. Max. Min. Typ. Max. 0.90 0 0.90 0.35 0.09 2.80 1.20 1.45 0.15 1.30 0.50 0.20 3.00 0.035 0.047 0.035 0.014 0.004 0.110 3.00 1.75 0.60 10d 0.102 0.059 0.012 0d 0.041 0.016 0.006 0.114 0.075 0.037 0.110 0.063 0.014 0.057 0.006 0.051 0.020 0.008 0.118 2.60 1.50 0.3 0d 1.05 0.40 0.15 2.90 1.90 0.95 2.80 1.60 0.5 0.118 0.069 0.024 10d Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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