TS432_E14

TS432
Adjustable Precision Shunt Regulator
SOT-23
Pin Definition:
1. Reference
2. Cathode
3. Anode
TO-92
Pin Definition:
1. Reference
2. Anode
3. Cathode
General Description
TS432 series 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. TS432 series
has a typical output impedance of 0.05Ω. Active output circuitry provides a very sharp turn-on characteristic,
making TS432 series excellent replacement for zener diode in many applications.
Features
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Ordering Information
Precision Reference Voltage
TS432A – 1.24V±1%
TS432B – 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
Sink Current Capability of 80µA to 100mA
Low Dynamic Output Impedance: 0.05Ω
Low Output Noise
Halogen Free Available
Applications
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Part No.
Package
Packing
TS432xCX RF
SOT-23
3kpcs / 7” Reel
TS432xCX RFG
SOT-23
3kpcs / 7” Reel
TS432xCT B0
TO-92
1kpcs / Bulk
TS432xCT A3
TO-92
2kpcs / Ammo
TS432xCT B0G
TO-92
1kpcs / Bulk
TS432xCT A3G
TO-92
2kpcs / Ammo
Note: Where x denotes voltage tolerance
A: ±1%, B: ±0.5%
“G” denotes for Halogen free products
Block Diagram
Voltage Monitor
Delay Timmer
Constant –Current Source/Sink
High-Current Shunt Regulator
Crow Bar
Over-Voltage / Under-Voltage Protection
Absolute Maximum Ratings (TA=25oC unless otherwise noted)
Parameter
Symbol
Limit
Unit
VKA
18
V
IK
100
mA
Reference Input Current Range
IREF
3
mA
Power Dissipation
PD
0.35
W
+150
o
Cathode Voltage (Note 1)
Continuous Cathode Current Range
Junction Temperature
TJ
C
Operation Temperature Range
TOPER
0 ~ +70
o
Storage Temperature Range
TSTG
-65 ~ +150
o
C
C
Note 1: Voltage values are with respect to the anode terminal unless otherwise noted.
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Version: E14
TS432
Adjustable Precision Shunt Regulator
Recommended Operating Condition
Parameter
(Note 1)
Cathode Voltage
Continuous Cathode Current Range
Symbol
Limit
Unit
VKA
IK
16
100
V
mA
Electrical Characteristics (TA=25oC unless otherwise noted)
Parameter
Reference voltage
Symbol
TS432A
TS432B
Deviation of reference input
voltage
Radio of change in Vref to
change in cathode Voltage
Reference Input current
Deviation of reference input
current, over temp.
Off-state Cathode Current
Dynamic Output Impedance
VREF
∆VREF
∆VREF/∆VKA
IREF
∆IREF
IKA (off)
|ZKA|
Test Conditions
VKA=VREF, IK=10mA
(Figure 1)
VKA =VREF, IK=10mA
TA= full range (Figure 1)
IKA=10mA, VKA = 16V 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=16V
f<1KHz, VKA=VREF
IKA=1mA to 100mA (Figure 1)
Min
1.227
1.233
Typ
1.240
Max
1.252
1.246
Unit
V
--
10
25
mV
--
-1.0
-2.7
mV/V
--
0.25
0.5
µA
--
0.04
0.8
µA
--
0.125
0.5
µA
--
0.2
0.4
Ω
Minimum Operating Cathode
IKA(MIN)
VKA=VREF (Figure 1)
-20
80
µA
Current
* 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, VREF 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
o
o
temperature. Example: ∆VREF=7.2mV and the slope is positive, VREF=1.241V at 25 C, ΔT=125 C
* 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:
2/12
Version: E14
TS432
Adjustable Precision Shunt Regulator
Test Circuits
Figure 1: VKA = VREF
Figure 2: VKA > VREF
Figure 3: Off-State Current
Additional Information – Stability
When TS432 series is used as a shunt regulator, there are two options for selection of C L, 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 TS432 series 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 TS432 series 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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Version: E14
TS432
Adjustable Precision Shunt Regulator
Applications Examples (Continue)
Figure 6: Shunt Regulator
Figure 7: High Current Shunt Regulator
Figure 8: Series Pass Regulator
Figure 9: Constant Current Source
Figure 10: TRIAC Crowbar
Figure 11: SCR Crowbar
4/12
Version: E14
TS432
Adjustable Precision Shunt Regulator
Applications Examples (Continue)
Vin
<Vref
>Vref
Vout
V+
≈0.74V
Figure 12: Single-Supply
Comparator with
Temperature-Compensated
Threshold
Figure 13: Constant Current Sink
5/12
Figure 14: Delay Timer
Version: E14
TS432
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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Version: E14
TS432
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
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 17: Stability Boundary Condition
Test Circuit for Pulse Response, Ik=1mA
Figure 18: Pulse Response
7/12
Version: E14
TS432
Adjustable Precision Shunt Regulator
Electrical Characteristics
Figure 19: Reference Voltage vs. Temperature
Figure 20: Reference Current vs. Temperature
Figure 21: Cathode Current vs. Cathode Voltage
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Version: E14
TS432
Adjustable Precision Shunt Regulator
SOT-23 Mechanical Drawing
Unit: Millimeters
Marking Diagram
2 = Device Code
X = Tolerance Code
(A = 1%, B = 0.5%)
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: E14
TS432
Adjustable Precision Shunt Regulator
TO-92 Mechanical Drawing
Unit: Millimeters
Marking Diagram
X = Tolerance Code
(A = 1%, B = 0.5%)
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
10/12
Version: E14
TS432
Adjustable Precision Shunt Regulator
TO-92 Ammo Pack Mechanical Drawing
Tape Dimension
ITEM DESCRIPTION
Base of Package to Lead Bend
SYMBOL
b
DIMENSION (mm)
2.4892 (typ)
Component Height
Ha
23.5712 (+/- 0.635)
Lead Clinch Height
HO
16.002 (+/- 0.508)
Component Base Height
H1
18.9992 (+/- 0.508)
Component Alignment ( side/side )
Pd
1.016 (max)
Component Alignment ( front/back )
Hd
0.7874 (max)
Component Pitch
P
12.7 (+/- 0.508)
Feed Hole Pitch
PO
12.7 (+/- 0.2032)
Hole Center to First Lead
P1
3.81 (+0.2286, -0.254)
Hole Center to Component Center
P2
6.2738 (+/- 0.1778)
F1/F2
2.6416 (+/- 0.254)
Lead Spread
Lead Thickness
d
0.4572 (+0.0508, -0.0762)
Cut Lead Length
L
10.8966 (max)
Taped Lead Length
L1
5.3086 (+1.2954, -1.3208)
Taped Lead Thickness
t
0.8128 (+/- 0.1524)
Carrier Tape Thickness
t1
0.5334 (+/- 0.1524)
Carrier Tape Width
W
17.9832 (+0.508, -0.4826)
Hold - down Tape Width
WO
5.9944 (+/- 0.3048)
Hold - down Tape position
W1
0.889 (max)
Feed Hole Position
W2
9.144 (+/- 0.635)
Sprocket Hole Diameter
DO
3.9878 (+0.2032, -0.1778)
Lead Spring Out
S
11/12
0.1016 (max)
Version: E14
TS432
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.
12/12
Version: E14