TS432BIXRKG [TSC]
Adjustable Precision Shunt Regulator;
| 型号： | TS432BIXRKG |
| 厂家： | 
TAIWAN SEMICONDUCTOR COMPANY, LTD |
| 描述： | Adjustable Precision Shunt Regulator |
| 文件： | 总10页 (文件大小：442K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TS432I
Adjustable Precision Shunt Regulator
SOT-23
Pin Definition:
1. Reference
2. Cathode
3. Anode
General Description
The TS432AI/TS432BI is a three-terminal adjustable shunt regulator with specified thermal stability. The output voltage
may be set to any value between VREF (approximately 1.24V) and 18V with two external resistors. The
TS432AI/TS432BI has a typical output impedance of 0.05Ω. Active output circuitry provides a very sharp turn-on
characteristic, making the TS432AI/TS432BI excellent replacement for zener diode in many applications.
Features
Ordering Information
●
Precision Reference Voltage
Part No.
TS432xIX RF
TS432xIX RFG
TS432xIX RK
TS432xIX RKG
Package
Packing
TS432AI – 1.24V±1%
SOT-23
SOT-23
SOT-23
SOT-23
3kpcs / 7” Reel
3kpcs / 7” Reel
10kpcs / 13” Reel
10kpcs / 13” Reel
TS432BI – 1.24V±0.5%
●
●
●
●
●
●
●
Minimum Cathode Current for Regulation: 20µA(typ.)
Equivalent Full Range Temp. Coefficient: 50ppm/ ºC
Programmable Output Voltage up to 18V
Fast Turn-On Response
Note: “G” denote for Halogen Free Product
Note: Where xx denotes voltage tolerance
A: ±1%, B: ±0.5%
Sink Current Capability of 80µA to 100mA
Low Dynamic Output Impedance: 0.2Ω
Low Output Noise
Block Diagram
Application
●
Voltage Monitor
●
●
●
●
●
Delay Timmer
Constant –Current Source/Sink
High-Current Shunt Regulator
Crow Bar
Over-Voltage / Under-Voltage Protection
Absolute Maximum Ratings (TA = 25˚C unless otherwise noted)
Parameter
Symbol
VKA
Limit
18
Unit
V
Cathode Voltage (Note 1)
Continuous Cathode Current Range
Reference Input Current Range
IK
100
mA
mA
IREF
3
TO-92
0.625
0.35
Power Dissipation
PD
W
SOT-23
Junction Temperature
TJ
+150
oC
oC
oC
Operation Temperature Range
Storage Temperature Range
TOPER
TSTG
-40 ~ +105
-65 ~ +150
Note 1: Voltage values are with respect to the anode terminal unless otherwise noted.
Note 2: Rating apply to ambient temperature at 25oC
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TS432I
Adjustable Precision Shunt Regulator
Recommend Operating Condition
Parameter
Cathode Voltage (Note 1)
Symbol
Limit
18
Unit
V
VKA
IK
Continuous Cathode Current Range
100
mA
Recommend Operating Condition
Parameter
Reference
voltage
Symbol
Test Conditions
Min
1.227
1.233
Typ
Max
1.252
1.246
Unit
TS432AI
TS432BI
V
KA =VREF, IK=10mA (Figure 1)
Ta=25oC
VREF
1.240
V
Deviation of reference input
voltage
VKA =VREF, IK=10mA
Ta= full range (Figure 1)
IKA=10mA, VKA = 18V to VREF
(Figure 2)
∆VREF
∆VREF/∆VKA
IREF
--
--
--
--
--
--
--
10
-1.0
0.25
0.04
0.125
0.2
25
-2.7
0.5
0.08
0.5
0.4
80
mV
mV/V
µA
Radio of change in Vref to
change in cathode Voltage
R1=10KΩ, R2=
Ta= full range (Figure 2)
R1=10KΩ, R2= , IKA=10mA
∞
, IKA=10mA
Reference Input current
Deviation of reference input
current, over temp.
∞
∆IREF
µA
Ta= full range (Figure 2)
VREF=0V (Figure 3),
VKA=18V
Off-state Cathode Current
Dynamic Output Impedance
IKA(off)
µA
f<1KHz, VKA=VREF
|ZKA|
Ω
IKA=1mA to 100mA (Figure 1)
Minimum operating cathode
current
IKA(min)
VKA=VREF (Figure 1)
60
µA
* The deviation parameters ∆VREF and ∆IREF are defined as difference between the maximum value and minimum value
obtained over the full operating ambient temperature range that applied.
* The average temperature coefficient of the
reference input voltage, αVREF is defined as:
Where: T2-T1 = full temperature change.
αVREF can be positive or negative depending on whether VREF Min. or VREF Max occurs at the lower ambient
temperature. Example: ∆VREF=7.2mV and the slope is positive, VREF=1.241V at 25oC, ꢀT=125oC
* The dynamic impedance ZKA is defined as:
* When the device operating with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of
the circuit is given by:
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Version: C14
TS432I
Adjustable Precision Shunt Regulator
Test Circuits
Figure 3: Off-State Current
Figure 2: VKA > VREF
Figure 1: VKA = VREF
Additional Information – Stability
When The TS432AI/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 TS432AI/432BI exhibits instability with capacitances in the range of 10nF to 1µF (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 0.1µF capacitor across it, it will oscillate transiently during
start up as the cathode current passes through the instability region. Select a very low capacitance, or alternatively a high
capacitance (10µF) will avoid this issue altogether. Since the user will probably wish to have local decoupling at the load anyway,
the most cost effective 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 the oscillation during the transient start up phase.
Note: if the TS432AI/432BI is located right at the load, so the load decoupling capacitor is directly across it, then this capacitor will
have to be ≤1nF or ≥10µF.
Applications Examples
Figure 5: Output Control for Three Terminal
Fixed Regulator
Figure 4: Voltage Monitor
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TS432I
Adjustable Precision Shunt Regulator
Applications Examples (Continue)
Figure 7: High Current Shunt Regulator
Figure 6: Shunt Regulator
Figure 9: Constant Current Source
Figure 8: Series Pass Regulator
Figure 10: TRIAC Crowbar
Figure 11: SCR Crowbar
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Version: C14
TS432I
Adjustable Precision Shunt Regulator
Applications Examples (Continue)
VIN
VOUT
<VREF
V+
>VREF ≈0.74V
Figure 13: Constant Current
Sink
Figure 12: Single-Supply
Comparator with Temperature-
Compensated Threshold
Figure 14: Delay Timer
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TS432I
Adjustable Precision Shunt Regulator
Typical Performance Characteristics
Test Circuit for Voltage Amplification
Figure 15: Small-Signal Voltage Gain and Phase Shift vs. Frequency
Test Circuit for Reference Impedance
Figure 16: Reference Impedance vs. Frequency
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Adjustable Precision Shunt Regulator
Typical Performance Characteristics
Test Circuit 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 adjusted to establish the initial VKA and IKA
Test Circuit for Curve B, C and D
conditions with C
L=0. VBATT and CL then were adjusted to
determine the ranges of stability.
Figure 17: Stability Boundary Condition
Test Circuit for Pulse Response, Ik=1mA
Figure 18: Pulse Response
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TS432I
Adjustable Precision Shunt Regulator
Electrical Characteristics
Figure 20: Reference Current vs. Temperature
Figure 19: Reference Voltage vs. Temperature
Figure 21: Cathode Current vs. Cathode Voltage
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TS432I
Adjustable Precision Shunt Regulator
SOT-23 Mechanical Drawing
Unit: Millimeters
Marking Diagram
X = Device Code
(D = TS432AI, E = TS432BI)
3 = SOT-23 package
Y = Year Code
M = Month Code
(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
= Month Code for Halogen Free Product
(O=Jan, P=Feb, Q=Mar, R=Apl, S=May, T=Jun, U=Jul, V=Aug, W=Sep,
X=Oct, Y=Nov, Z=Dec)
L = Lot Code
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Version: C14
TS432I
Adjustable Precision Shunt Regulator
Notice
Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf,
assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, to any
intellectual property 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 particular purpose, merchantability,
or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers
using or selling these products 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.
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Version: C14
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