TS2431ACYRM [TSC]
Adjustable Precision Shunt Regulator; 可调式精密并联稳压器
| 型号： | TS2431ACYRM |
| 厂家： | 
TAIWAN SEMICONDUCTOR COMPANY, LTD |
| 描述： | Adjustable Precision Shunt Regulator |
| 文件： | 总13页 (文件大小：895K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TS2431
Adjustable Precision Shunt Regulator
TO-92
SOT-89
SOT-23
SOP-8
Pin Definition:
1. Cathode 8. Reference
Pin Definition:
1. Reference
2. Anode
Pin Definition:
1. Cathode
2. Reference
3. Anode
2. Anode
3. Anode
4. N/C
7. Anode
6. Anode
5. N/C
3. Cathode
General Description
TS2431 series integrated circuits are three-terminal programmable shunt regulator diodes. These monolithic IC
voltage references operate as a low temperature coefficient 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 stable reference from 5.0V logic supplies, and since The TS2431 series operates as a shunt
regulator, it can be used as either a positive or negative stage reference.
Features
Ordering Information
●
Precision Reference Voltage
TS2431 – 2.495V±2%
TS2431A – 2.495V±1%
TS2431B – 2.495V±0.5%
Equivalent Full Range Temp. Coefficient: 50ppm/ ºC
Programmable Output Voltage up to 36V
Fast Turn-On Response
Sink Current Capability of 1~100mA
Low Dynamic Output Impedance: 0.2Ω
Low Output Noise
Part No.
TS2431xCT B0
TS2431xCT A3
TS2431xCX RF
TS2431xCY RM
TS2431xCS RL
Package
TO-92
TO-92
SOT-23
SOT-89
SOP-8
Packing
1Kpcs / Bulk
2Kpcs / Ammo
3Kpcs / 7” Reel
1Kpcs / 7” Reel
2.5Kpcs / 13” Reel
●
●
●
●
●
●
Note: Where xx denotes voltage tolerance
Blank: ±2%
A: ±1%
B: ±0.5%
Application
Block Diagram
●
●
●
●
●
●
Voltage Monitor
Delay Timmer
Constant –Current Source/Sink
High-Current Shunt Regulator
Crow Bar
Over-Voltage / Under-Voltage Protection
Absolute Maximum Rating (Ta = 25oC unless otherwise noted)
Parameter
Symbol
Limit
37
-100 ~ +150
-0.05 ~ +10
0.625
Unit
V
mA
mA
Cathode Voltage (Note 1)
Continuous Cathode Current Range
Reference Input Current Range
VKA
IK
IREF
TO-92
SOT-23
PD
W
Power Dissipation
0.30
SOT-89 / SOP-8
0.50
Junction Temperature
TJ
+150
oC
oC
oC
Operating Temperature Range
Storage Temperature Range
TOPER
TSTG
0 ~ +70
-65 ~ +150
Note 1: Voltage values are with respect to the anode terminal unless otherwise noted.
1/13
Version: E07
TS2431
Adjustable Precision Shunt Regulator
Recommend Operating Condition
Parameter
Symbol
Limit
Ref ~ 36
1 ~ 100
Unit
V
Cathode Voltage (Note 1)
VKA
IK
Continuous Cathode Current Range
mA
Recommend Operating Condition
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
TS2431
2.450
2.475
2.487
2.550
2.525
2.513
VKA =VREF, IK =10mA (Figure 1)
Ta=25oC
Reference voltage
VREF
2.495
V
TS2431A
TS2431B
Deviation of reference input
voltage
VKA = VREF, IK =10mA (Figure 1)
Ta= full range
∆ VREF
∆VREF /∆VKA
IREF
--
3
12
mV
mV/V
uA
Radio of change in Vref to
change in cathode Voltage
IKA =10mA, VKA = 10V to VREF
VKA = 36V to 10V (Figure 2)
--
--
-1.4
-1.0
-2.7
-2.0
R1=10KΩ, R2=
Ta= full range (Figure 2)
R1=10KΩ, R2= , IKA =10mA
∞
, IKA =10mA
Reference Input current
--
--
--
--
--
0.7
0.4
--
4.0
1.2
1.0
0.5
0.6
Deviation of reference input
current, over temp.
∞
∆IREF
uA
Ta= full range (Figure 2)
VREF =0V (Figure 3),
VKA =36V
Off-state Cathode Current
Dynamic Output Impedance
IKA (off)
uA
f<1KHz, VKA = VREF
IKA =1mA to 100mA (Figure 1)
| ZKA
|
0.22
0.4
Ω
Minimum operating cathode
current
IKA (min)
VKA = VREF (Figure 1)
mA
* 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.
∆VREF can be positive or negative depending on whether the slope is positive or negative.
Example: Maximum VREF=2.496V at 30oC, minimum VREF =2.492V at 0oC, VREF =2.495V at 25oC, ∆T=70oC
∆VREF | = [4mV / 2495mV] * 106 / 70oC ≈ 23ppm/oC
Because minimum VREF occurs at the lower temperature, the coefficient is positive.
* The dynamic impedance ZKA is defined as:
| ZKA | = ∆VKA / ∆IKA
* 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:
| ZKA | = ∆v / ∆i | ≈ ZKA | * ( 1 + R1 / R2)
2/13
Version: E07
TS2431
Adjustable Precision Shunt Regulator
Test Circuits
Figure 3: Off-State Current
Figure 2: VKA > VREF
Figure 1: VKA = VREF
Additional Information – Stability
When The TS2431/2431A/2431B 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 TS2431/2431A/2431B 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 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 (10uF) 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 TS2431/2431A/2431B is located right at the load, so the load decoupling capacitor is directly across it, then
this capacitor will have to be ≤1nF or ≥10uF.
Applications Examples
Figure 5: Output Control for Three Terminal
Figure 4: Voltage Monitor
Fixed Regulator
3/13
Version: E07
TS2431
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
4/13
Version: E07
TS2431
Adjustable Precision Shunt Regulator
Applications Examples (Continue)
Vin
Vout
<Vref
V+
>Vref ≈0.74V
Figure 12: Single-Supply Comparator with
Temperature-Compensated Threshold
Figure 13: Constant Current Sink
Figure 14: Delay Timer
5/13
Version: E07
TS2431
Adjustable Precision Shunt Regulator
Typical Performance Characteristics
Test Circuit for Voltage Amplification
Figure 14: Small-Signal Voltage Gain and Phase Shirt vs. Frequency
Test Circuit for Reference Impedance
Figure 15: Reference Impedance vs. Frequency
6/13
Version: E07
TS2431
Adjustable Precision Shunt Regulator
Typical Performance Characteristics (Continue)
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
conditions with CL=0. VBATT and CL then were adjusted to
determine the ranges of stability.
Test Circuit for Curve B, C and D
Figure 16: Stability Boundary Condition
Test Circuit for Pulse Response, Ik=1mA
Figure 17: Pulse Response
7/13
Version: E07
TS2431
Adjustable Precision Shunt Regulator
Electrical Characteristics
Figure 18: Reference Voltage vs. Temperature
Figure 19: Reference Current vs. Temperature
Figure 20: Cathode Current vs. Cathode Voltage
8/13
Version: E07
TS2431
Adjustable Precision Shunt Regulator
TO-92 Mechanical Drawing
TO-92 DIMENSION
MILLIMETERS INCHES
DIM
MIN
4.30
4.30
MAX
4.70
4.70
MIN
MAX
0.185
0.185
A
B
C
D
E
F
0.169
0.169
14.30(typ)
0.563(typ)
0.43
2.19
3.30
2.42
0.37
0.49
2.81
3.70
2.66
0.43
0.017
0.086
0.130
0.095
0.015
0.019
0.111
0.146
0.105
0.017
G
H
Marking Diagram
X = Tolerance Code
(A = ±1%, B = ±0.5%, Blank = ±2%,)
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)
L = Lot Code
9/13
Version: E07
TS2431
Adjustable Precision Shunt Regulator
SOT-23 Mechanical Drawing
SOT-23 DIMENSION
MILLIMETERS
MIN MAX
0.95 BSC
1.9 BSC
2.60
INCHES
MIN MAX.
DIM
A
A1
B
C
D
E
F
0.037 BSC
0.074 BSC
3.00
1.70
3.10
1.30
0.10
0.50
0.20
0.60
10º
0.102
0.118
0.067
0.122
0.051
0.004
0.020
0.008
0.024
10º
1.40
2.80
1.00
0.00
0.35
0.10
0.30
5º
0.055
0.110
0.039
0.000
0.014
0.004
0.012
5º
G
H
I
J
Marking Diagram
X = Tolerance Code
(A = ±1%, B = ±0.5%, C = ±2%,)
2 = Device Code
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)
L = Lot Code
10/13
Version: E07
TS2431
Adjustable Precision Shunt Regulator
SOT-89 Mechanical Drawing
SOT-89 DIMENSION
MILLIMETERS INCHES
MIN
DIM
MIN
4.40
1.50
2.30
0.40
1.50
3.00
0.89
4.05
1.4
MAX
4.60
1.7
MAX
0.181
0.070
0.102
0.020
0.059
0.118
0.047
0.167
0.068
0.017
A
B
C
D
E
F
G
H
I
0.173
0.059
0.090
0.016
0.059
0.118
0.035
0.159
0.055
0.014
2.60
0.52
1.50
3.00
1.20
4.25
1.6
J
0.35
0.44
Marking Diagram
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)
L
= Lot Code
CY = Package Code
11/13
Version: E07
TS2431
Adjustable Precision Shunt Regulator
SOP-8 Mechanical Drawing
SOP-8 DIMENSION
MILLIMETERS
INCHES
MIN
DIM
MIN
4.80
3.80
1.35
0.35
0.40
MAX
5.00
4.00
1.75
0.49
1.25
MAX.
0.196
0.157
0.068
0.019
0.049
A
B
C
D
F
0.189
0.150
0.054
0.014
0.016
G
K
M
P
R
1.27BSC
0.05BSC
0.10
0º
0.25
7º
0.004
0º
0.009
7º
5.80
0.25
6.20
0.50
0.229
0.010
0.244
0.019
Marking Diagram
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)
L
= Lot Code
12/13
Version: E07
TS2431
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 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.
13/13
Version: E07
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