TL432BSA-7 [DIODES]
ADJUSTABLE PRECISION SHUNT REGULATOR; 可调式精密并联稳压器
| 型号： | TL432BSA-7 |
| 厂家： | 
DIODES INCORPORATED |
| 描述： | ADJUSTABLE PRECISION SHUNT REGULATOR |
| 文件： | 总14页 (文件大小：355K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Description
Pin Assignments
TL431
(Top View)
The TL431 and TL432 are three terminal adjustable shunt
regulators offering excellent temperature stability and output
current handling capability up to 100mA. The output voltage
may be set to any chosen voltage between 2.5 and 36 volts
by selection of two external divider resistors.
3
REF
ANODE
1
The devices can be used as a replacement for zener diodes
in many applications requiring an improvement in zener
performance. Diodes’ TL431 has the same electrical
specifications as the industry standard ‘431 and is available
in 2 grades with initial tolerances of 1% and 0.5% for the
A and B grades respectively.
2
CATHODE
SOT23
(Top View)
5
ANODE
REF
NC
NC
1
2
3
Features
•
•
Temperature range -40 to 125ºC
CATHODE
4
Reference Voltage Tolerance at 25°C
•
TL431A: 2.495V ± 1.0%.
SOT25
•
TL431B: 2.495V ± 0.5%
•
•
•
Low Output Noise
TL432
(Top View)
0.2Ω Typical Output Impedance
Sink Current Capability: 1mA to 100mA
•
•
Adjustable Output Voltage: VREF to 36V
SOT23 and SOT25: Available in “Green” Molding
Compound (No Br, Sb) and Lead Free Finish/ RoHS
Compliant (Note 1)
3
CATHODE
REF
1
ANODE
2
Applications
SOT23
•
•
•
•
Opto-Coupler Linearisers
Shunt Regulators
Improved Zener
Variable Reference
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
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September 2010
© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Absolute Maximum Ratings (Note 2)
Symbol
VKA
Parameter
Rating
40
Unit
V
Cathode Voltage
IKA
Continuous Cathode Current
Reference Input Current
Operating Junction Temperature
Storage Temperature
150
mA
mA
°C
IREF
TJ
-0.050 to +10
+150
TST
-55 to +150
330
°C
SOT23
SOT25
mW
mW
PD
Power Dissipation (Notes 3, 4)
500
Notes: 2. Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for
extended periods, may reduce device reliability. Unless otherwise stated voltages specified are relative to the ANODE pin.
3. TJ, max =150°C.
4. Ratings apply to ambient temperature at 25°C.
Recommended Operating Conditions
Symbol
VKA
Parameter
Min
VREF
1
Max
36
Unit
V
Cathode Voltage
Cathode Current
IKA
100
125
mA
°C
TA
Operating Ambient Temperature
-40
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September 2010
© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Electrical Characteristics (TA = +25°C, unless otherwise noted)
Symbol
Parameter
Reference voltage
Test Conditions
Min
Typ.
Max
2.520
2.507
16
Unit
V
TL431A
2.470 2.495
V
KA = VREF
,
VREF
IKA = 10mA
TL431B
2.482 2.495
V
TA = 0 to 70 oC
TA = -40 to 85 oC
TA = -40 to 125 oC
VKA = 10V to VREF
6
mV
mV
mV
mV/V
VKA = VREF
,
Deviation of reference voltage over
full temperature range (Note 5)
VDEV
14
34
IKA = 10mA
14
34
ΔVREF
ΔVKA
Ratio of the change in reference
voltage to the change in cathode
voltage
-1.4
-2.7
I
KA = 10mA
VKA = 36V to 10V
-1
-2
mV/V
IREF
Reference input current
IKA = 10mA, R1 = 10KΩ, R2 = ∞
1
4
μA
μA
μA
μA
TA = 0 to 70 oC
0.8
0.8
0.8
1.2
2.5
2.5
IREF deviation over full temperature IKA = 10mA, R1 =
range (Note 5)
ΔIREF
TA = -40 to 85 oC
TA = -40 to 125 oC
10KΩ, R2 = ∞
Minimum cathode current for
regulation
IKA(MIN)
VKA = VREF
0.4
0.7
mA
IKA(OFF) Off-state current
VKA = 36V, VREF = 0V
0.05
0.2
0.5
0.5
μA
Ω
Dynamic output impedance (Note 6) VKA = VREF, f = 0Hz
|ZKA
|
SOT23
380
250
oC/W
oC/W
Thermal Resistance Junction to
Ambient
θJA
SOT25
Notes: 5. Deviation of VDEV, and ΔIREF are defined as the maximum variation of the values over the full temperature range.
The average temperature coefficient of the reference input voltage αVREF is defined as:
Vmax
VDEV
X 106
VREF @ 25ºC
ppm/ºC
αVREF
=
T2 – T1
Vmin
Where:
T2 – T1 = full temperature change.
V
DEV = Vmax - Vmin
αVREF can be positive or negative depending on whether the slope is
positive or negative.
Notes: 6. The dynamic output impedance, RZ, is defined as:
ΔVKA
T1
T2
ZKA
=
Temperature
ΔIKA
When the device is programmed with two external resistors R1 and R2, the dynamic output
impedance of the overall circuit, is defined as:
ΔV
ΔI
R1
R2
1 +
ZKA
≈
Z’
=
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Test Circuits
Figure 1. Test circuit for VKA = VREF
Figure 2. Test circuit for VKA > VREF
Figure 3. Test circuit for IOFF
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Performance Characteristics
2600
0.2
I
= 10mA
KA
R1 = 10KΩ
R2 = ∞
2580
2560
2540
V
T
= V
REF
KA
= 25°C
A
I
= 10mA
KA
0.15
0.1
2520
2500
2480
2460
2440
2420
2400
0.05
0
-55 -35 -15
5
25 45
65 85 105 125
-55 -35 -15
5
25 45 65
85 105 125
TA Free Air Temperature (°C)
TA Free Air Temperature (°C)
Reference Voltage vs. Free Air Temperature
Reference Current vs. Free Air Temperature
150
100
200
100
V
T
= V
KA
REF
V
= V
REF
KA
= 25°C
A
T
= 25°C
A
50
0
I
KMIN
0
-50
-100
-100
-2
-1
0
1
2
3
-2
-1
0
1
2
3
VKA Cathode Voltage (V)
VKA Cathode Voltage
Cathode Current vs. Cathode Voltage
Cathode Current vs. Cathode Voltage
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Performance Characteristics (Continued)
0.50
0.45
0.40
-0.2
-0.3
-0.4
V
V
= 36V
= 0
KA
V
= 3V to 36V
KA
REF
0.35
0.30
0.25
0.20
0.15
-0.5
-0.6
-0.7
-0.8
0.10
0.05
0.00
-0.9
-1.0
-50
-25
0
25
50
75
100 125
-75 -50 -25
TA Free Air Temperature (°C)
Off-State Cathode Current vs. Free Air Temperature
0
25
50
75
100 125
TA Free Air Temperature (C)
Ratio of Delta Reference Voltage to Delta Cathode
Voltage vs. Free Air Temperature
400
380
I
= 10mA
= V
KA
V
T
KA
REF
= 25°C
A
360
340
320
300
280
260
240
220
200
10
100
1K
10K
100K
f- Frequency (Hz)
Equivalent Input Noise Voltage vs. Frequency
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Performance Characteristics (Continued)
15
I
= 10mA
= V
KA
V
T
KA
REF
10
= 25°C
A
5
0
-5
-10
-15
0
1
2
3
4
5
6
7
8
9
10
Time (Seconds)
Equivalent Input Noise Voltage Over A 10-S Period
Figure 4. Test circuit for noise input voltage
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Performance Characteristics (Continued)
70
60
50
40
I
= 10mA
KA
T
= 25°C
A
30
20
10
0
10M
1K
10K
f Frequency (Hz)
Small-Signal Voltage Amplification vs. Frequency
100K
1M
100
Test circuit for voltage amplification
100.0
10.0
1.0
I
= 10mA
KA
T
= 25°C
A
0.1
0.0
Test circuit for reference impedance
1K
10K
100K
1M
10M
f Frequency (Hz)
Reference Impedance vs. Frequency
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Performance Characteristics (Continued)
6
T
= 25°C
A
Input
5
4
3
2
Output
Test Circuit for Pulse Response
1
0
0
1
2
3
4
5
6
7
8
9
10
t Time (μs)
Pulse Response
100
90
T
= 25°C
D
A
D
80
70
60
50
40
30
20
C
C
B
A
Stable
Stable
Stable
B
Test Circuit for Curve A
A V = V
KA
REF
B V = 5V
KA
C V
D V
= 10V
= 15V
KA
KA
10
0
0.00001 0.0001 0.001 0.01
0.1
1
10
CL -Load Capacitance - uF
Stability Boundary Conditions
Test Circuit for Curves B, C, D
The device is stable under all conditions with a load capacitance not exceeding 50pF. The device is stable under all conditions with a load
capacitance between 5nF and 20nF. The device is stable under all conditions with a load capacitance exceeding 300nF. With a cathode
current not exceeding 5mA, the device is stable with any load capacitance.
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Applications Information
Higher Current
Shunt Regulator
Shunt Regulator
Output Control of a Three
Terminal Fixed Regulator
Series Regulator
Single Supply Comparator
with Temperature
Compensated Threshold
Over Voltage / Under
Voltage Protection Circuit
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Ordering Information
TL43 X X XX - 7
Pinout variation
Tolerance
A: ±1.0%
B: ±0.5%
Package
Packing
1: Standard pinout
SA: SOT23
W5: SOT25
7: Tape & Reel
2: Reversed pinout in SOT23
7” Tape and Reel
Ammo Box
Device
(Note 7)
Package
Code
Packaging
(Note 5)
Part Number
Suffix
Quantity
Quantity
Part Number Suffix
TL431A(B)SA-7
TL431A(B)W5-7
TL432A(B)SA-7
SA
W5
SA
SOT23
SOT25
SOT23
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
-7
-7
-7
NA
NA
NA
NA
NA
NA
Notes:
7. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
8. Suffix “B” denotes TL431B device.
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Marking Information
(1) SOT23
( Top View )
3
XX : Identification code
Y : Year 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
XX Y W X
X : A~Z : Green
1
2
Device
Package
Identification Code
TL431ASA
TL431BSA
TL432ASA
TL432BSA
SOT23
SOT23
SOT23
SOT23
AA
AB
BA
BB
(2) SOT25
( Top View )
5
4
XX : Identification code
Y : Year 0~9
W X
XX Y
2
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X : A~Z : Green
1
3
Device
Package
Identification Code
TL431AW5
TL431BW5
SOT25
SOT25
AA
AB
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Package Outline Dimensions (All Dimensions in mm)
(1) Package type: SOT25
(2) Package Types: SOT23
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
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DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
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1. are intended to implant into the body, or
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in the labeling can be reasonably expected to result in significant injury to the user.
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Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
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Copyright © 2010, Diodes Incorporated
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© Diodes Incorporated
TL431/432
Document number: DS35050 Rev. 2 - 2
相关型号：
TL432CDBVR
1-OUTPUT THREE TERM VOLTAGE REFERENCE, 2.495V, PDSO5, GREEN, PLASTIC, SOT-23, 5 PIN
ROCHESTER
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