TS1431BCTA3G

T S1 4 3 1 Adjustable Precision Shunt Regulator TO-92 Pin Definition: 1. Cathode 2 . An o d e 3. Reference SOT-23 Pin Definition: 1. Cathode 2. Reference 3 . An o d e General Description TS1431 series integrated circuits ar e three-ter minal programmable shunt regulator diodes. These monolithic IC voltage references operate as a low temperature c oefficient zener which is programmable from Vref to 36 volts with two external resistors. These devices exhibit a wide operating current range of 1.0 to 100mA with a typical dynamic impedance of 0.22Ω. The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. The 2.5V reference makes it convenient to obtain a s table reference from 5.0V logic supplies, and since The TS1431 series operates as a shunt regulator, it can be used as either a positive or negative stage reference. Features ● Precision Reference Voltage TS1431 – 2.495V±2% TS1431A – 2.495V±1% TS1431B – 2.495V±0.5% Equivalent Full Range Temp. Coefficient: 50ppm/ ºC Programmable Output Voltage up to 36V Fast Turn- On R esponse Sink Current Capability of 1~100mA Low Dynamic Output Impedance: 0.2Ω Low Output Noise Ordering Information Part No. Package Packi ng TS1431xC T B0 TO-92 1Kpcs / Bulk TS1431xC T A3 TO-92 2Kpcs / Ammo TS1431xC X RF SOT-23 3Kpcs / 7” Reel TS1431xC T B0G TO-92 1Kpcs / Bulk TS1431xC T A3G TO-92 2Kpcs / Ammo TS1431xC X RFG SOT-23 3Kpcs / 7” Reel Note: “G” denote for Gr een Product Where xx denotes voltage tolerance Blank: ±2%, A: ±1%, B: ±0.5% ● ● ● ● ● ● Application ● ● ● ● ● ● Voltage Monitor Delay Timmer Constant –Current Source/Sink High-Current Shunt Regulator Crow Bar Over-Voltage / Under-Voltage Protection Block Diagram Absolute Maximum Rating (Ta = 25oC unless otherwise noted) Parameter Cathode Voltage Continuous C athode Current Range Reference Input Current Range Power Dissipation Junction Temperature Operating Temperature Range Storage Temperature Range Symbol Vka Ik Iref T O- 9 2 SOT-23 Pd Tj Toper Tstg Limit 36 1 ~ +1 0 0 -0.05 ~ +10 0.625 0.30 +1 5 0 0 ~ +7 0 - 6 5 ~ +1 5 0 Unit V mA mA W o o C C o C 1/11 Version: B07 T S1 4 3 1 Adjustable Precision Shunt Regulator Recommend Operating Condition Parameter Cathode Voltage (Note 1) Continuous C athode Current Range Symbol VKA IK Limit R ef ~ 3 6 1 ~ 100 Unit V mA Recommend Operating Condition Parameter TS1431 TS1431A TS1431B Deviation of reference input voltage Radio of change in Vref to change in cathode Voltage Reference voltage Reference Input current Deviation of reference input current, over temp. Off-state C athode C urrent Dynamic Output Impedance Symbol VREF ∆ VREF ∆VREF /∆VKA IREF ∆IREF IKA (off) | ZKA | Test Conditi ons VKA =VREF, IK =10mA (Figure 1) o Ta=25 C VKA = VREF, IK =10mA ( Figure 1) Ta= full range IKA =10mA, VKA = 10V to VREF VKA = 36V to 10V (Figure 2) R1=10KΩ, R2= ! , IKA =10mA Ta= full range ( Figure 2) R1=10KΩ, R2= ! , IKA =10mA Ta= full range ( Figure 2) VREF =0V ( Figure 3) , VKA =36V f VREF Fi gure 3: Off-State Current Additional Information – Stability When The TS1431/1431A/1431B is used as a shunt regulator, there are tw o options for selection of CL, are recommended for optional stability: A) No load capacitance across the device, decouple at the load. B) Large capac itance across the device, optional decoupling at the load. The reason for this is that TS1431/1431A/1431B exhibits instability with capacitances in the range of 10nF to 1uF (approx.) at light cathode current up to 3mA ( typ). The device is less s table the lower the cathode voltage has been set for. Therefore while the device will be per fectly stable operating at a cathode current of 10mA (approx .) with a 0.1uF capacitor across it, it will oscillate transiently dur ing star t up as the cathode current passes through the instability region. Selec t a very low capacitance, or alternatively a high c apacitance (10uF) will avoid this issue altogether. Sinc e the user will probably wish to have local decoupling at the load anyway, the mos t cost effective method is to use no capacitance at all direc tly across the device. PC B trace/via resis tance and inductance prevent the local load decoupling from causing the oscillation during the transient s tart up phase. Note: if the TS1431/1431A/1431B is located right at the load, so the load decoupling capacitor is direc tly acros s it, then this capacitor will have to be ≤1nF or ≥10uF. Applications Examples Fi gure 4: Voltage Monitor Fi gure 5: Output Contr ol for Three Termi nal Fixed Regulator 3/11 Version: B07 T S1 4 3 1 Adjustable Precision Shunt Regulator Applications Examples (Continue) Fi gure 6: Shunt Regul ator Fi gure 7: Hi gh Current Shunt Regulator Fi gure 8: Series Pass Regulator Fi gure 9: Constant Current Sour ce Fi gure 10: TRI AC Crowbar Fi gure 11: SCR Cr owbar 4/11 Version: B07 T S1 4 3 1 Adjustable Precision Shunt Regulator Applications Examples (Continue) Vin Vref Vout V+ ≈0.74V Fi gure 12: Si ngle-Supply Compar ator with Temperatur e-Compensated Threshol d Fi gure 13: Constant Current Si nk Fi gure 14: Del ay Timer 5/11 Version: B07 T S1 4 3 1 Adjustable Precision Shunt Regulator Typical Performance Characteristics Test C ircuit for Voltage A mplificat ion Fi gure 14: Small-Si gnal Voltage Gai n and Phase Shirt vs. Frequency Test C ircuit for Reference Impedance Fi gure 15: Reference I mpedance vs. Frequency 6/11 Version: B07 T S1 4 3 1 Adjustable Precision Shunt Regulator Typical Performance Characteristics (Continue) Test C ircuit for Curve A The areas under the curves represent conditions that may cause the dev ice to oscillate. For curves B, C , and D , R2 and V+ w ere adjusted to es tablish the initial VKA and IKA conditions with C L=0. VBATT and CL then were adjus ted to deter mine the ranges of stability. Test C ircuit for Curve B, C and D Fi gure 16: Stability Boundar y Conditi on Test C ircuit for Pulse Response, Ik=1mA Fi gure 17: Pulse Response 7/11 Version: B07 T S1 4 3 1 Adjustable Precision Shunt Regulator Electrical Characteristics Fi gure 18: Reference Voltage vs. Temperature Fi gure 19: Reference Current vs. Temper ature Fi gure 20: Cathode Current vs. Cathode Voltage 8/11 Version: B07 T S1 4 3 1 Adjustable Precision Shunt Regulator TO-92 Mechanical Drawing DIM A B C D E F G H TO-92 DIMEN SION MILLIMETER S INCH ES MIN MAX MIN MAX 4.30 4.70 0.169 0.185 4.30 4.70 0.169 0.185 14.30( typ) 0.563( typ) 0.43 0.49 0.017 0.019 2.19 2.81 0.086 0.111 3.30 3.70 0.130 0.146 2.42 2.66 0.095 0.105 0.37 0.43 0.015 0.017 Marking Diagram X = Tolerance Code (A = ±1%, B = ±0.5%, Blank = ±2%,) Y = Year Code M = Month C ode (A=Jan, B =Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep, J=Oc t, K=Nov , L=Dec) L = Lo t C ode 9/11 Version: B07 T S1 4 3 1 Adjustable Precision Shunt Regulator SOT-23 Mechanical Drawing DIM A A1 B C D E F G H I J SOT-23 DIMENSION MILLIMETER S INCH ES MIN MAX MIN MAX. 0.95 BSC 0.037 BSC 1.9 BSC 0.074 BSC 2.60 3.00 0.102 0.118 1.40 1.70 0.055 0.067 2.80 3.10 0.110 0.122 1.00 1.30 0.039 0.051 0.00 0.10 0.000 0.004 0.35 0.50 0.014 0.020 0.10 0.20 0.004 0.008 0.30 0.60 0.012 0.024 5º 10º 5º 10º Marking Diagram 1 = Device Code X = Tolerance Code (A = ±1%, B = ±0.5%, C = ±2%,) Y = Year Code M = Month C ode (A=Jan, B =Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep, J=Oc t, K=Nov , L=Dec) L = Lo t C ode 10/11 Version: B07 T S1 4 3 1 Adjustable Precision Shunt Regulator Notice Specifications of the produc ts displayed herein are s ubject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Infor mation contained herein is intended to pr ovide a product description only. N o license, express or implied, to any intellectual proper ty rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for such products , TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of TSC products including liability or warranties relating to fitness for a par ticular purpose, merchantability, or infringement of any patent, copyright, or other intellectual proper ty right. The products shown herein are not designed for use in medical, life-saving, or life-sus taining applications . C ustomers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale. 11/11 Version: B07