TLV431ALPRA [ONSEMI]
Low Voltage Precision Adjustable Shunt Regulator; 低电压精密可调并联稳压器
| 型号： | TLV431ALPRA |
| 厂家： | 
ONSEMI |
| 描述： | Low Voltage Precision Adjustable Shunt Regulator |
| 文件： | 总14页 (文件大小：186K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TLV431A, TLV431B
Low Voltage Precision
Adjustable Shunt Regulator
The TLV431A and B series are precision low voltage shunt
regulators that are programmable over a wide voltage range of 1.24 V
to 16 V. The TLV431A series features a guaranteed reference accuracy
of 1.0% at 25°C and 2.0% over the entire industrial temperature
range of −40°C to 85°C. For TLV431B series, the accuracy is even
higher, it’s 0.5% and 1.0% respectively. These devices exhibit a
sharp low current turn−on characteristic with a low dynamic
impedance of 0.20 W over an operating current range of 100 mA to
20 mA. This combination of features makes this series an excellent
replacement for zener diodes in numerous applications circuits that
require a precise reference voltage. When combined with an
optocoupler, the TLV431A/B can be used as an error amplifier for
controlling the feedback loop in isolated low output voltage (3.0 V to
3.3 V) switching power supplies. These devices are available in
economical TO−92−3 and micro size TSOP−5 and
SOT−23−3 packages.
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TO−92−3−3
LP SUFFIX
CASE 29
1
2
3
4
TSOP−5
SN SUFFIX
CASE 483
5
3
Features
2
1
• Programmable Output Voltage Range of 1.24 V to 16 V
• Voltage Reference Tolerance "1.0% for A Series and
"0.5% for B Series
• Sharp Low Current Turn−On Characteristic
3
SOT−23−3
SN1 SUFFIX
CASE 318
1
• Low Dynamic Output Impedance of 0.20 W from 100 mA to 20 mA
• Wide Operating Current Range of 50 mA to 20 mA
• Micro Miniature TSOP−5, SOT−23−3 and TO−92−3 Packages
• Pb−Free Packages are Available
2
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
Applications
• Low Output Voltage (3.0 V to 3.3 V) Switching Power Supply
Error Amplifier
• Adjustable Voltage or Current Linear and Switching Power Supplies
• Voltage Monitoring
• Current Source and Sink Circuits
DEVICE MARKING INFORMATION
AND PIN CONNECTIONS
See general marking information in the device marking
section on page 11 of this data sheet.
• Analog and Digital Circuits Requiring Precision References
• Low Voltage Zener Diode Replacements
Cathode (K)
Reference (R)
+
−
1.24 V
ref
Anode (A)
Figure 1. Representative Block Diagram
Semiconductor Components Industries, LLC, 2005
1
Publication Order Number:
January, 2005 − Rev. 7
TLV431A/D
TLV431A, TLV431B
Cathode (K)
Reference (R)
Cathode (K)
Reference (R)
Anode (A)
Device Symbol
Anode (A)
The device contains 13 active transistors.
Figure 2. Representative Device Symbol and Schematic Diagram
MAXIMUM RATINGS (Full operating ambient temperature range applies, unless otherwise noted)
Rating Symbol
Value
18
Unit
V
Cathode to Anode Voltage
V
KA
Cathode Current Range, Continuous
I
−20 to 25
*0.05 to 10
mA
mA
°C/W
K
Reference Input Current Range, Continuous
I
ref
Thermal Characteristics
LP Suffix Package, TO−92−3 Package
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
SN Suffix Package, TSOP−5 Package
Thermal Resistance, Junction−to−Ambient
SN1 Suffix Package, SOT−23−3 Package
Thermal Resistance, Junction−to−Ambient
R
R
178
83
q
JA
q
q
q
JC
226
R
R
JA
491
150
JA
J
Operating Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
T
°C
°C
°C
T
*40 to 85
*65 to 150
A
T
stg
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
NOTE: This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per MIL−STD−883,
Method 3015. Machine Model Method 200 V.
T
* T
J(max)
R
A
P
+
D
qJA
RECOMMENDED OPERATING CONDITIONS
Condition
Symbol
Min
Max
16
Unit
V
Cathode to Anode Voltage
Cathode Current
V
V
ref
KA
I
0.1
20
mA
K
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2
TLV431A, TLV431B
ELECTRICAL CHARACTERISTICS (T = 25°C unless otherwise noted)
A
TLV431A
Typ
TLV431B
Typ Max
Min
Max
Min
Characteristic
Reference Voltage (Figure 3)
Symbol
Unit
V
ref
V
1.228 1.240 1.252 1.234 1.240 1.246
(V = V , I = 10 mA, T = 25°C)
KA
ref
K
A
1.215
−
1.265 1.228
−
1.252
(T = T
to T , Note 1)
A
low
high
Reference Input Voltage Deviation Over Temperature (Figure 3)
(V = V , I = 10 mA, T = T to T , Note 1)
DV
mV
ref
−
7.2
20
−
7.2
20
KA
ref
K
A
low
high
Ration of Reference Input Voltage Change to Cathode Voltage
Change (Figure 4)
DVref
DVKA
mV
V
−
−
−0.6
−1.5
−
−
−0.6
−1.5
(V = V to 16 V, I = 10 mA)
KA
ref
K
Reference Terminal Current (Figure 4)
(I = 10 mA, R1 = 10 kW, R2 = open)
K
I
mA
mA
ref
0.15
0.3
0.15
0.3
Reference Input Current Deviation Over Temperature (Figure 4)
DI
ref
−
−
0.04
55
0.08
80
−
−
0.04
55
0.08
80
(I = 10 mA, R1 = 10 kW, R2 = open, Notes 1, 2)
K
Minimum Cathode Current for Regulation (Figure 3)
I
)
mA
mA
K(min
Off−State Cathode Current (Figure 5)
I
K(off)
−
−
0.01
0.012 0.05
0.04
−
−
0.01
0.012 0.05
0.04
(V = 6.0 V, V = 0)
KA
ref
(V = 16 V, V = 0)
KA
ref
Dynamic Impedance (Figure 3)
(V = V , I =0.1 mA to 20 mA, f ≤ 1.0 kHz, Note 3)
|Z
KA
|
W
−
0.25
0.4
−
0.25
0.4
KA
ref
K
1. Ambient temperature range: T
= *40°C, T
= 85°C.
low
high
2. The deviation parameters DV and DI are defined as the difference between the maximum value and minimum value obtained over the
ref
ref
full operating ambient temperature range that applied.
V
ref
Max
DV = V Max − V Min
ref
ref
ref
DT = T − T
1
V
ref
Min
A
2
T
Ambient Temperature
T
2
1
The average temperature coefficient of the reference input voltage, aV is defined as:
ref
(DV
ref
)
ǒ
106
Ǔ
V
(T + 25°C)
ref
A
ppm
ref ǒ Ǔ+
°C
αV
DT
A
aV can be positive or negative depending on whether V Min or V Max occurs at the lower ambient temperature, refer to Figure 8.
ref
ref
ref
Example: DV = 7.2 mV and the slope is positive,
ref
Example: V @ 25°C = 1.241 V
ref
Example: DT = 125°C
A
106
0.0072
1.241
ppm
°C
ref ǒ Ǔ+
αV
+ 46 ppmń°C
125
3. The dynamic impedance Z is defined as:
KA
DV
KA
DIK
Z +
KA
When the device is operating with two external resistors, R1 and R2, (refer to Figure 4) the total dynamic impedance of the circuit is given by:
R1
ǒ1 )
Ǔ
Z ′ + Z
KA
KA
R2
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3
TLV431A, TLV431B
Input
V
Input
V
Input
V
KA
KA
KA
I
I
I
K(off)
K
K
I
R1
R2
ref
V
ref
V
ref
R1
R2
refꢀǒꢀ1 ) ꢀǓ) I
V
+ V
ꢀSꢀR1
KA
ref
Figure 3. Test Circuit
for VKA = Vref
Figure 4. Test Circuit
Figure 5. Test Circuit
for IK(off)
for VKA u Vref
110
90
70
50
30
10
30
Input
V
KA
I
K
Input
V
KA
20
10
I
K
I
K(min)
V
KA
= V
ref
T
A
= 25°C
V
KA
= V
ref
T
A
= 25°C
0
−10
−30
−10
−1.0
−0.5
0
0.5
1.0
1.5
2.0
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
V
, CATHODE VOLTAGE (V)
KA
V
, CATHODE VOLTAGE (V)
KA
Figure 6. Cathode Current vs. Cathode Voltage
Figure 7. Cathode Current vs. Cathode Voltage
0.15
0.14
1.25
1.24
Vref
(max)
Input
10 k
V
KA
I
K
I
ref
Vref
(typ)
I
= 10 mA
K
1.23
1.22
0.13
0.12
Input
V
K
KA
Vref
(min)
I
V
= V
ref
KA
I
= 10 mA
K
TLV431A Typ.
60
−40
−15
10
35
85
−40
−15
10
35
60
85
T , AMBIENT TEMPERATURE (°C)
A
T , AMBIENT TEMPERATURE (°C)
A
Figure 8. Reference Input Voltage versus
Ambient Temperature
Figure 9. Reference Input Current versus
Ambient Temperature
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4
TLV431A, TLV431B
4.0
0
−2.0
−4.0
−6.0
Input
V
KA
I
= 10 mA
K
I
off
V
V
= 16 V
= 0 V
KA
T = 25°C
A
3.0
2.0
ref
Input
V
KA
I
K
R1
R2
1.0
0
V
ref
−8.0
−10
T = 25°C
A
0
4.0
8.0
12
16
0
4.0
8.0
12
16
20
V
, CATHODE VOLTAGE (V)
KA
V
, CATHODE VOLTAGE (V)
KA
Figure 10. Reference Input Voltage Change
versus Cathode Voltage
Figure 11. Off−State Cathode Current
versus Cathode Voltage
0.4
0.3
0.2
10
Output
I
K
Input
V
KA
50
I
off
V
= 16 V
= 0 V
KA
−
V
ref
+
1.0
0.1
0.1
0
I
= 0.1 mA to 20 mA
K
T = 25°C
A
−40
−15
10
35
60
85
1.0 k
10 k
100 k
f, FREQUENCY (Hz)
1.0 M
10 M
T , AMBIENT TEMPERATURE (°C)
A
Figure 12. Off−State Cathode Current versus
Figure 13. Dynamic Impedance versus
Frequency
Ambient Temperature
0.24
0.23
0.22
0.21
60
50
40
30
20
Output
I
= 0.1 mA to 20 mA
K
f = 1.0 kHz
Output
15 k
I
K
I
K
9 m F
230
50
−
−
8.25 k
+
+
I
= 10 mA
K
T = 25°C
A
0.20
0.19
10
0
−40
−15
10
35
60
85
100
1.0 k
10 k
f, FREQUENCY (Hz)
100 k
1.0 M
T , AMBIENT TEMPERATURE (°C)
A
Figure 14. Dynamic Impedance versus
Ambient Temperature
Figure 15. Open−Loop Voltage Gain
versus Frequency
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5
TLV431A, TLV431B
350
Output
1.8 kW
Input
Input
Output
I
K
I
ref
1.5
1.0
0.5
0
325
300
V
I
T
A
= V
ref
= 10 mA
= 25°C
KA
50
Output
Input
K
T
A
= 25°C
2.0
0
275
250
10
100
1.0 k
f, FREQUENCY (Hz)
10 k
100 k
0
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
t, TIME (ms)
Figure 16. Spectral Noise Density
Figure 17. Pulse Response
1.0 k
25
20
15
T = 25°C
A
I
K
R1
R2
A
Stable
V+
C
L
C
B
Stable
10
5.0
0
Stable
Unstable
Regions
V
(V)
R1
(kW)
R2
(kW)
KA
D
10
100
pF
1.0
nF
0.01
mF
0.1
mF
1.0
mF
10
mF
100
mF
A, C
B, D
V
0
∞
ref
pF
5.0
30.4
10
C , LOAD CAPACITANCE
L
Figure 18. Stability Boundary Conditions
Figure 19. Test Circuit for Figure 18
Stability
Figures 18 and 19 show the stability boundaries and
circuit configurations for the worst case conditions with the
load capacitance mounted as close as possible to the device.
The required load capacitance for stable operation can vary
depending on the operating temperature and capacitor
equivalent series resistance (ESR). Ceramic or tantalum
surface mount capacitors are recommended for both
temperature and ESR. The application circuit stability
should be verified over the anticipated operating current and
temperature ranges.
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6
TLV431A, TLV431B
TYPICAL APPLICATIONS
V
in
V
out
V
in
V
out
R1
R2
R1
R2
R1
R1
+ ǒ1 ) ǓV
V
+ ǒ1 ) ǓV
V
out
ref
R2
out
ref
R2
Figure 20. Shunt Regulator
Figure 21. High Current Shunt Regulator
V
in
V
out
MC7805
V
in
Out
Common
In
V
out
R1
R2
R1
R2
R1
R1
+ ǒ1 ) ǓV
out(min)
+ ǒ1 ) ǓV
out(min)
V
V
out
out
ref
ref
R2
R2
V
+ V ) V [ 2.0 V
V
+ V ) 5.0 V
ref be
ref
Figure 22. Output Control for a Three Terminal
Fixed Regulator
Figure 23. Series Pass Regulator
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7
TLV431A, TLV431B
I
V
in
sink
V
ref
I
+
sink
R
S
I
out
R
CL
V
in
V
out
R
S
V
R
ref
I
+
out
CL
Figure 24. Constant Current Source
Figure 25. Constant Current Sink
V
in
V
in
V
out
V
out
R1
R1
R2
R2
R1
R1
+ ǒ1 ) ǓVref
+ ǒ1 ) ǓV
V
V
out(trip)
out(trip)
ref
R2
R2
Figure 26. TRIAC Crowbar
Figure 27. SCR Crowbar
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8
TLV431A, TLV431B
V+
V
in
R1
R2
R3
LED
V
out
V
in
R4
L.E.D. indicator is ‘ON’ when V is
in
between the upper and lower limits,
V
in
V
out
R1
Lower limit + ǒ1 ) ǓVref
tV
uV
V+
R2
ref
R3
ref
Upper limit + ǒ1 ) ǓVref
≈ 0.74 V
R4
Figure 28. Voltage Monitor
Figure 29. Single−Supply Comparator with
Temperature−Compensated Threshold
25 V
38 V
2.0 mA
1N5305
T1 = 330 W to 8.0 W
330
T1
5 k
1%
50 k
1%
1.0 M
1%
500 k
1%
+
10 k
Calibrate
470 mF
8.0 W
360 k
10 kW
V
100 kW
V
1.0 mF
1.0 kW
V
1.0 MW
Volume
47 k
V
*
25 V
0.05 mF
25 k
*Thermalloy
*THM 6024
*Heatsink on
56 k
−
+
Tone
10 k
V
out
Range
*LP Package.
−5.0 V
R
x
W
V
R
+ V ꢀDꢀꢀ ꢀ Range
x
out
Figure 30. Linear Ohmmeter
Figure 31. Simple 400 mW Phono Amplifier
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9
TLV431A, TLV431B
AC Input
DC Output
3.3 V
Gate Drive
100
V
CC
Controller
R1
3.0 k
V
FB
C1
0.1 mF
Current
Sense
R2
1.8 k
GND
Figure 32. Isolated Output Line Powered Switching Power Supply
The above circuit shows the TLV431A/B as a compensated amplifier controlling the feedback loop of an isolated output line
powered switching regulator. The output voltage is programmed to 3.3 V by the resistors values selected for R1 and R2. The
minimum output voltage that can be programmed with this circuit is 2.64 V, and is limited by the sum of the reference voltage
(1.24 V) and the forward drop of the optocoupler light emitting diode (1.4 V). Capacitor C1 provides loop compensation.
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10
TLV431A, TLV431B
PIN CONNECTIONS AND DEVICE MARKING
TSOP−5
TO−92
SOT−23−3
1
2
3
5
Anode
NC
NC
1
Reference
Cathode
TLV43
1XXX
ALYWW
Anode
3
Reference
4
Cathode
2
1. Reference
2. Anode
3. Cathode
(Top View)
(Top View)
XXX
A
L
= Specific Device Code
= Assembly Location
= Wafer Lot
1
2 3
Y
= Year
WW, W = Work Week
ORDERING INFORMATION
Device
†
Device Code
ALP
Package
Shipping
TLV431ALP
TO−92−3
6000/Box
6000/Box
TLV431ALPG
ALP
TO−92−3
(Pb−Free)
TLV431ALPRA
ALP
ALP
TO−92−3
2000/Tape & Reel
2000/Tape & Reel
TLV431ALPRAG
TO−92−3
(Pb−Free)
TLV431ALPRE
ALP
ALP
TO−92−3
2000/Tape & Reel
2000/Tape & Reel
TLV431ALPREG
TO−92−3
(Pb−Free)
TLV431ALPRM
TLV431ALPRP
TLV431ALPRPG
ALP
ALP
ALP
TO−92−3
TO−92−3
2000/Ammo Pack
2000/Ammo Pack
2000/Ammo Pack
TO−92−3
(Pb−Free)
TLV431ASNT1
RAA
RAA
TSOP−5
3000/Tape & Reel
3000/Tape & Reel
TLV431ASNT1G
TSOP−5
(Pb−Free)
TLV431ASN1T1
RAF
RAF
SOT−23−3
3000/Tape & Reel
3000/Tape & Reel
TLV431ASN1T1G
SOT−23−3
(Pb−Free)
TLV431BLP
BLP
BLP
BLP
TO−92−3
TO−92−3
6000/Box
TLV431BLPRA
TLV431BLPRAG
2000/Tape & Reel
2000/Tape & Reel
TO−92−3
(Pb−Free)
TLV431BLPRE
TLV431BLPRM
TLV431BLPRP
TLV431BSNT1
TLV431BSNT1G
BLP
BLP
BLP
RAH
RAH
TO−92−3
TO−92−3
TO−92−3
TSOP−5
2000/Tape & Reel
2000/Ammo Pack
2000/Ammo Pack
3000/Tape & Reel
3000/Tape & Reel
TSOP−5
(Pb−Free)
TLV431BSN1T1
RAG
RAG
SOT−23−3
3000/Tape & Reel
3000/Tape & Reel
TLV431BSN1T1G
SOT−23−3
(Pb−Free)
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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11
TLV431A, TLV431B
PACKAGE DIMENSIONS
TO−92−3
LP SUFFIX
CASE 29−11
ISSUE AL
NOTES:
A
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
B
2. CONTROLLING DIMENSION: INCH.
3. CONTOUR OF PACKAGE BEYOND DIMENSION R
IS UNCONTROLLED.
4. LEAD DIMENSION IS UNCONTROLLED IN P AND
BEYOND DIMENSION K MINIMUM.
R
P
L
INCHES
DIM MIN MAX
MILLIMETERS
SEATING
PLANE
K
MIN
4.45
4.32
3.18
0.407
1.15
2.42
0.39
MAX
5.20
5.33
4.19
0.533
1.39
2.66
0.50
−−−
A
B
C
D
G
H
J
0.175
0.170
0.125
0.016
0.045
0.095
0.015
0.500
0.250
0.080
0.205
0.210
0.165
0.021
0.055
0.105
0.020
−−− 12.70
−−−
0.105
D
X X
G
J
H
V
K
L
6.35
2.04
−−−
2.93
3.43
−−−
C
N
P
R
V
2.66
2.54
−−−
−−− 0.100
SECTION X−X
0.115
0.135
−−−
−−−
1
N
−−−
N
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12
TLV431A, TLV431B
PACKAGE DIMENSIONS
TSOP−5
SN SUFFIX
CASE 483−02
ISSUE C
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. MAXIMUM LEAD THICKNESS INCLUDES
LEAD FINISH THICKNESS. MINIMUM LEAD
THICKNESS IS THE MINIMUM THICKNESS
OF BASE MATERIAL.
4. A AND B DIMENSIONS DO NOT INCLUDE
MOLD FLASH, PROTRUSIONS, OR GATE
BURRS.
D
5
4
3
B
C
S
1
2
L
MILLIMETERS
DIM MIN MAX
INCHES
MIN MAX
G
A
B
C
D
G
H
J
K
L
M
S
2.90
1.30
0.90
0.25
0.85
3.10 0.1142 0.1220
1.70 0.0512 0.0669
1.10 0.0354 0.0433
0.50 0.0098 0.0197
1.05 0.0335 0.0413
A
J
0.013 0.100 0.0005 0.0040
0.05 (0.002)
0.10
0.20
1.25
0
0.26 0.0040 0.0102
0.60 0.0079 0.0236
1.55 0.0493 0.0610
H
M
K
10
0
10
_
_
_
_
2.50
3.00 0.0985 0.1181
SOLDERING FOOTPRINT*
1.9
0.074
0.95
0.037
2.4
0.094
1.0
0.039
0.7
0.028
TSOP−5
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
http://onsemi.com
13
TLV431A, TLV431B
PACKAGE DIMENSIONS
SOT−23−3
SN1 SUFFIX
CASE 318−09
ISSUE AK
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. MAXIMUM LEAD THICKNESS INCLUDES LEAD
FINISH THICKNESS. MINIMUM LEAD
THICKNESS IS THE MINIMUM THICKNESS OF
BASE MATERIAL.
A
L
3
4. 318−01 THRU −07 AND −09 OBSOLETE, NEW
STANDARD 318−08.
S
C
B
1
2
INCHES
MIN
MILLIMETERS
DIM
A
B
C
D
G
H
J
MAX
0.1197
0.0551
0.0440
0.0200
0.0807
0.0040
0.0070
0.0285
0.0401
0.1039
0.0236
MIN
2.80
1.20
0.89
0.37
1.78
0.013
0.085
0.35
0.89
2.10
0.45
MAX
3.04
1.40
1.11
0.50
2.04
0.100
0.177
0.69
1.02
2.64
0.60
V
G
0.1102
0.0472
0.0350
0.0150
0.0701
0.0005
0.0034
0.0140
0.0350
0.0830
0.0177
H
J
D
K
K
L
S
V
SOLDERING FOOTPRINT*
0.95
0.037
0.95
0.037
2.0
0.079
0.9
0.035
0.8
0.031
mm
inches
ǒ
Ǔ
SCALE 10:1
SOT−23−3
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
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arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
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