TS431I

TS431 Low voltage adjustable shunt reference Features ■ ■ ■ ■ ■ ■ ■ ■ ■ 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: Human body model: 2kV Machine model: 200V 100ppm/°C temperature coefficient Z TO-92 (Plastic Package) L SOT23-5 (Plastic Micropackage) Description The TS431 is a low-voltage, three-terminal, 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 widely used TL431 and TL1431 shunt voltage reference. Part number TS431ILT SOT23-5 TS431AILT TS431AIYLT(1) TS431BILT TS431BIYLT(1) TS431IYLT(1) TS431IZ/IZT/IZ-AP TS431AIZ/AIZT/AIZ-AP TS431BIZ/BIZT/BIZ-AP TO-92 Bulk (Z), Tape & reel (ZT) or Ammo pack (AP) -40, + 125°C SOT23-5 (automotive grade level) SOT23-5 SOT23-5 (automotive grade level) SOT23-5 (automotive grade level) Tape & reel L271 L276 L270 L273 L274 TS431I TS431AI TS431BI Temperature range When driving an optocoupler, the TS431 is particularly useful for regulating 3.3V switching power supplies. Package Packing Marking L272 1. Qualified and characterized according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent. October 2006 Rev 4 1/14 www.st.com 14 Contents TS431 Contents 1 2 3 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1 3.2 3.3 3.4 SOT23-5 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 TO-92 (tape & reel) package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 TO92 (tape ammo pack) package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 TO92 (bulk) package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2/14 TS431 Absolute maximum ratings and operating conditions 1 Absolute maximum ratings and operating conditions Table 1. Symbol VKA Ik Iref Pd Tstd Absolute maximum ratings Parameter Cathode to anode voltage Continuous cathode current range Reference input current range Power dissipation(1) TO92 package SOT23-5 package Storage temperature range Value 10 -20 to +40 -0.05 to +3 625 500 -65 to +150 Unit V mA mA mW °C 1. Tjunction=150°C, Tamb=25°C with RTHj-a=200°C/W for TO92 package and RTHj-a=250°C/W for SOT23-5L package Table 2. Symbol VKA Ik Toper Operating conditions Parameter Cathode to anode voltage Cathode current Operating free air temperature range Value 1.24 to 6 0.06 to 30 -40 to +125 Unit V mA °C 3/14 Electrical characteristics TS431 2 Table 3. Symbol Vref Electrical characteristics Tamb = 25°C (unless otherwise specified) Parameter Output voltage VKA = Vref @ Ik = 100μA Output voltage change (1) (2) Ik = 100μA, VKA = Vref Test conditions TS431 TS431A TS431B 0 < Tamb < +70°C -40 < Tamb < +85°C -40 < Tamb < +105°C -40 < Tamb < +125°C 1.8 70 70 90 40 0.001 0.2 Min. 1.215 1.228 1.234 Typ. 1.240 Max. 1.265 1.252 1.246 9 16 18 21 2.7 160 160 240 60 0.1 0.4 Unit V ΔVref mV Δ Vref --------------Δ Vka Ratio of change in reference input IK = 10mA voltage to change in cathode to VKA = 6V to Vref anode voltage Reference input current Reference input current deviation over temperature range Minimum cathode current for regulation Off-state cathode current Static impedance IK = 10mA IK=10mA, R1=10kΩ, R2=∝ -40 < Tamb < +85°C -40 < Tamb < +125°C VKA = Vref VKA = 6V, Vref = 0 VKA = Vref, IK = 0.1 to 15mA mV/V nA nA Iref ΔIref Imin Ioff RKA 2. μA μA Ω 1. Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design. ΔVref is defined as the difference between the maximum and minimum values obtained over the full temperature range. ΔVref = Vref max. - Vref min. Vref m ax. Vref m in . T1 T2 T e m p e r a tu r e 4/14 TS431 Electrical characteristics Figure 1. 1.252 Reference voltage vs. temperature Figure 2. Input Test circuit for Vka = Vref Output Ik 1.248 Reference voltage (V) Vka = Vref Ik = 100 µA 1.244 1.24 Vka 1.236 1.232 1.228 -40 -20 0 20 40 60 80 100 120 Temperature (°C) Vref Figure 3. 15 Cathode voltage vs. cathode current Figure 4. 1.5 Cathode voltage vs. cathode current 10 Ika Cathode current (mA) Vka Cathode voltage (V) Vka = Vref T = 25°C 5 1 0 -5 0.5 +125°C -40°C +25°C +85°C -10 -15 -1 -0.5 0 0.5 1 1.5 Vka Cathode voltage (V) 0 0 10 20 30 40 50 60 Ika Cathode current (µA) Figure 5. 100 Reference input current vs. temperature Figure 6. 0.4 Static impedance vs. temperature Iref Reference current (nA) 80 Rka Static Impedance (Ohms) Ik = 10mA R1 = 10 KΩ R2 = + ∞ 0.3 60 Vka = Vref Ik = 100µA to 15mA 0.2 40 0.1 20 0 -40 -20 0 20 40 60 80 100 120 Temperature (°C) 0 -40 -20 0 20 40 60 80 100 120 Temperature (°C) 5/14 Electrical characteristics TS431 Figure 7. 200 Off-state current vs. temperature Figure 8. Test circuit for off-state current measurement Vka=6V Ioff Input IOff Off-State current (nA) 150 100 50 0 -40 -20 0 20 40 60 80 100 120 Temperature (°C) Figure 9. Ratio of change in reference input Figure 10. Test circuit for Vka > Vref voltage to change in Vka voltage vs. temperature Input Vka Ratio of change in reference input voltage (mV/V) 0 Ik -1 R1 Iref Ik = 10mA Vka = 6V to Vref -2 R2 Vref -3 -40 -20 0 20 40 60 80 100 120 Temperature (°C) Vka = Vref . (1+R1/R2) + Iref . R1 Figure 11. Phase and gain vs. frequency 60 150 Figure 12. Test circuit for phase and gain measurement Phase 50 100 10µF Output Ik=100µA 40 Gain (dB) 50 30 Phase margin # 50° 0 Phase (°) 6.8K 10µF 20 -50 Gain 10 0 1E+3 Input -100 -150 1E+6 4.3K Vref 1E+4 1E+5 Frequency (Hz) 6/14 TS431 Figure 13. Pulse response at Ik=100μA Electrical characteristics Figure 14. Test circuit for pulse response at Ik=100μA Input voltage 3 input and output voltage (V) 18KΩ Ik=100µA 2 Output voltage 1 50Ω 0 0 1 2 3 4 5 Time (µs) 6 7 8 9 10 Figure 15. Pulse response at Ik=1mA Figure 16. Test circuit for pulse response at Ik=1mA Input voltage 3 input and output voltage (V) 1.8KΩ Ik=1mA 2 Output voltage 1 0 0 1 2 3 4 5 6 7 Time (µs) Figure 17. Equivalent input noise vs. frequency 250 Equivalent input noise (nv/VHz) 200 150 100 Vka = Vref Ik = 100 µA T=25°C 50 0 0.1 1 10 Frequency (KHz) 100 1000 Intput 50Ω 7/14 Output Pulse Generator f=100KHz Output Pulse Generator f=100KHz Intput Package mechanical data TS431 3 Package mechanical data In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com. 8/14 TS431 Package mechanical data 3.1 SOT23-5 package Dimensions Ref. Min. A A1 A2 b C D E E1 e e1 L 0.35 0.90 0.00 0.90 0.35 0.09 2.80 2.60 1.50 0.95 1.9 0.55 0.014 Millimeters Typ. Max. 1.45 0.15 1.30 0.50 0.20 3.00 3.00 1.75 Min. 0.035 0.00 0.035 0.014 0.003 0.110 0.102 0.059 0.037 0.075 0.022 Inches Typ. Max. 0.057 0.006 0.051 0.02 0.008 0.118 0.118 0.069 . 9/14 Package mechanical data TS431 3.2 TO-92 (tape & reel) package Dimensions Ref. Min. A b D E e e1 L R S1 W 4.32 0.36 4.45 3.30 2.41 1.14 12.7 2.16 0.92 0.41 Millimeters Typ. Max. 4.95 0.51 4.95 3.94 2.67 1.40 15.49 2.41 1.52 0.56 Min. 0.170 0.014 0.175 0.130 0.095 0.045 0.500 0.085 0.036 0.016 Inches Typ. Max. 0.195 0.020 0.195 0.155 0.105 0.055 0.610 0.095 0.060 0.022 10/14 TS431 Package mechanical data 3.3 TO92 (tape ammo pack) package A1 P P T H d A H1 H0 H I1 W0 D0 F1 F2 P2 P0 W2 W1 W L1 Millimeters Dim. Min. AL A T d I1 P PO P2 F1/F2 Δh ΔP W W0 W1 W2 H H0 H1 DO L1 3.8 4.0 15.5 16 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 13.7 13 6.75 2.8 1 1 19.0 6.3 9.75 0.5 20 16.5 25 4.2 11 0.150 0.610 0.45 0.098 0.461 0.488 0.234 0.094 -0.039 -0.039 0.689 0.224 0.335 Typ. Max. 5.0 5.0 4.0 Min. Inches Typ. Max. 0.197 0.197 0.157 0.018 0.500 0.500 0.250 0.098 0 0 0.709 0.236 0.354 0.539 0.512 0.266 0.110 0.039 0.039 0.748 0.248 0.384 0.020 0.787 0.630 0.650 0.984 0.157 0.165 0.433 11/14 Package mechanical data TS431 3.4 TO92 (bulk) package Millimeters Dim. Min. L B O1 C K O2 a 3.2 4.45 4.58 12.7 0.407 0.35 0.5 0.508 Typ. 1.27 3.7 5.00 5.03 4.2 5.2 5.33 0.126 0.1752 0.1803 0.5 0.016 0.0138 Max. Min. Inches Typ. 0.05 0.1457 0.1969 0.198 0.1654 0.2047 0.2098 Max. 0.0197 0.02 12/14 TS431 Revision history 4 Revision history Table 4. Date 1-Sep-2003 1-Oct-2005 Document revision history Revision 1 2 Initial release. PPAP references inserted in the datasheet. See the order codes table on the cover page. Minor changes to formatting and grammar. TS431AIYLT PPAP reference inserted. See the order codes table on the cover page. Included footnote on automotive grade qualification to order code table on cover page. Updated package information (changed mils to inches). Changes 2-Jan-2006 3 22-Sep-2006 4 13/14 TS431 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. 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