T S4 3 2 I
Adjustable Precision Shunt Regulator
T O- 9 2
Pin Definition: 1. Reference 2 . An o d e 3. Cathode
SOT-23
Pin Definition: 1. Reference 2. Cathode 3 . An o d e
SOT-25
Pin Definition: 1. N/C 2. N/C * 3. Cathode 4. Reference 5 . An o d e * (p in 2 is connect to substra te and must be connected to Anode or left open)
General Description
The TS432I/432AI/TS432BI is a three-terminal adjustable shunt regulator w ith specified ther mal stability. The output voltage may be set to any value between Vref (approximately 1.24V) and 18V with two external resistors. The TS432I/432AI/TS432BI has a typical output impedanc e of 0.05Ω . Active output circuitry provides a very shar p turn-on characteristic, mak ing the TS432I/432AI/TS432BI excellent replacement for zener diode in many applications.
Features
● Precision Reference Voltage TS432I – 1.24V±2% TS432AI – 1.24V±1% TS432BI – 1.24V±0.5% Minimum Cathode Current for R egulation: 20uA(typ.) Equivalent Full Range Temp. Coefficient: 50ppm/ ºC Programmable Output Voltage up to 18V Fast Turn- On R esponse Sink Current Capability of 80uA to 100mA Low Dynamic Output Impedance: 0.2Ω Low Output Noise
Ordering Information
Part No. Package Packi ng
TS432xIT B0 TO-92 1Kpcs / Bulk TS432xIT A3 TO-92 2Kpcs / Ammo TS432xIX RF SOT-23 3Kpcs / 7” Reel TS432xIX5 R F SOT-25 3Kpcs / 7” Reel Note: W here xx denotes voltage tolerance Blank: ±2% A: ±1 % B: ±0.5%
● ● ● ● ● ● ●
Block Diagram
Application
● ● ● ● ● ● Voltage Monitor Delay Timmer Constant –Current Source/Sink High-Current Shunt Regulator Crow Bar Over-Voltage / Under-Voltage Protection
Absolute Maximum Rating (Ta = 25 oC unless otherwise noted)
Parameter
Cathode Voltage (Note 1) Continuous C athode Current Range Reference Input Current Range Power Dissipation
Symbol
Vka Ik Iref
Limit
Unit
V mA mA W
o o
18 100 3 T O- 9 2 0.625 SOT-23 Pd 0.35 SOT-25 0.35 Junction Temperature TJ +1 5 0 Operation Temperature Range TOPER - 4 0 ~ +8 5 Storage Temperature Range TSTG - 6 5 ~ +1 5 0 Note 1: Voltage values are with respec t to the anode terminal unless otherwise noted. o Note 2: Rating apply to ambient temperature at 25 C
C C o C
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Version: A07
T S4 3 2 I
Adjustable Precision Shunt Regulator
Recommend Operating Condition
Parameter
Cathode Voltage (Note 1) Continuous C athode Current Range
Symbol
Vka Ik
Limit
18 100
Unit
V mA
Recommend Operating Condition
Parameter
TS432I Reference voltage TS432AI TS432BI Vref
Symbo
Test Conditi ons
Vka =Vr ef, Ik=10mA ( Figure 1) o Ta=25 C Vka =Vr ef, Ik=10mA Ta= full range ( Figure 1) Ika=10mA, Vka = 18V to Vref (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=18V f Vref
Fi gure 3: Off-State Current
Additional Information – Stability
When The TS432I/432AI/432BI is used as a shunt regulator, there are two options for selection of CL, are recommended for optional stability: A) No load capacitance across the device, decouple at the load. B) Large capacitance across the device, optional decoupling at the load. The reason for this is that TS432I/432AI/432BI exhibits instability with capacitances in the range of 10nF to 1uF (approx.) at light cathode current up to 3mA (typ). The device is less stable the lower the cathode voltage has been set for. Therefore while the device will be perfectly stable operating at a cathode current of 10mA (approx.) with a 0.1uF capacitor across it, it w ill oscilla te transiently du ring sta rt up as the cathode current passes thro ugh the instability region. Select a very low capacitance, o r alternatively a high capacitance (10uF) will avoid this issue altogether. Since the user will probably w ish to have local decoupling at the load anyway, the most cost e ffective method is to use no capacitance at all directly across the device. PCB trace/via resistance and inductance prevent the local load decoupling from causing th e oscillation du ring the transient start up phase. Note: if the TS432I/432AI/432BI is located right at the load, s o the load decoupling capacitor is directly across it, then th is 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
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T S4 3 2 I
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
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Version: A07
T S4 3 2 I
Adjustable Precision Shunt Regulator
Applications Examples (Continue)
Vin Vref
Vout V+ ≈0.74V
Fi gure 12: Si ngle-Supply Compar ator with TemperatureCompensated Threshold
Fi gure 13: Constant Current Si nk
Fi gure 14: Del ay Timer
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Version: A07
T S4 3 2 I
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 Shift vs. Fr equency
Test C ircuit for Reference Impedance
Fi gure 15: Reference I mpedance vs. Frequency
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Version: A07
T S4 3 2 I
Adjustable Precision Shunt Regulator
Typical Performance Characteristics
Test C ircuit for Curve A
The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C , and D , R2 and V+ were adjus ted to establish 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
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Version: A07
T S4 3 2 I
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
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Version: A07
T S4 3 2 I
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
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Version: A07
T S4 3 2 I
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
X = Device Code (D = TS432AI, E = TS432BI, F = TS432I,) 3 = SOT-23 package 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
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Version: A07
T S4 3 2 I
Adjustable Precision Shunt Regulator SOT-25 Mechanical Drawing
DIM A+A1 B C D E E H L Ө1 S1
SOT-25 DIMENSION MILLIMETER S INCH ES MIN MAX MIN MAX. 0.09 1.25 0.0354 0.0492 0.30 0.50 0.0118 0.0197 0.09 0.25 0.0035 0.0098 2.70 3.10 0.1063 0.1220 1.40 1.80 0.0551 0.0709 1.90 BSC 0.0748 BSC 2.40 3.00 0.09449 0.1181 0.35 BSC 0.0138 BSC 0º 10º 0º 10º 0.95 BSC 0.0374 BSC
Marking Diagram
X = Device Code (D = TS432AI, E = TS432BI, F = TS432I,) 5 = SOT-25 package 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
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Version: A07
T S4 3 2 I
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 pr oducts for use in9 such applications do so at their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale.
12/12
Version: A07