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TL431 PDF даташит

Спецификация TL431 изготовлена ​​​​«Diodes» и имеет функцию, называемую «ADJUSTABLE PRECISION SHUNT REGULATOR».

Детали детали

Номер произв TL431
Описание ADJUSTABLE PRECISION SHUNT REGULATOR
Производители Diodes
логотип Diodes логотип 

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TL431 Даташит, Описание, Даташиты
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Description
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.
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.
Features
Temperature range -40 to +125ºC
Reference Voltage Tolerance at 25°C
TL431A: 2.495V ± 1.0%
TL431B: 2.495V ± 0.5%
Low Output Noise
0.2Typical Output Impedance
Sink Current Capability: 1mA to 100mA
Adjustable Output Voltage: VREF to 36V
All devices are:
Totally Lead-Free & Fully RoHS compliant
(Notes 1 & 2)
Halogen and Antimony Free. “Green” Device
(Note 3)
Pin Assignments
TL431
(Top View)
CATHODE 1
3 ANODE
REF 2
SOT23
(Top View)
NC
Leave floating or
connect to pin 5
2
5 ANODE
CATHODE 3
4 REF
SOT25
(Top View)
CATHODE 1
ANODE 2
ANODE 3
NC 4
8 REF
7 ANODE
6 ANODE
5 NC
SO-8
SO-8 is a future product
Applications
Opto-Coupler Linearisers
Shunt Regulators
Improved Zener
Variable Reference
TL432
(Top View)
REF 1
CATHODE 2
3 ANODE
SOT23
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen and Antimony free,
"Green" and Lead-Free.
3. Halogen and Antimony free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
TL431
*SO-8 is a future package
Document number: DS35044 Rev. 6 - 2
1 of 14
www.diodes.com
April 2012
© Diodes Incorporated









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TL431 Даташит, Описание, Даташиты
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Absolute Maximum Ratings (Note 4)
Symbol
Parameter
Rating
Unit
VKA Cathode Voltage
40 V
IKA Continuous Cathode Current
150 mA
IREF Reference Input Current
TJ Operating Junction Temperature
TST Storage Temperature
SOT23
-0.050 to +10
+150
-55 to +150
330
mA
°C
°C
PD
Power Dissipation (Notes 5, 6)
SOT25
SO-8*
500 mW
700
Notes:
4. 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.
5. TJ, MAX =150°C.
6. Ratings apply to ambient temperature at 25°C.
Recommended Operating Conditions
Symbol
VKA
IKA
TA
Parameter
Cathode Voltage
Cathode Current
Operating Ambient Temperature
Min
VREF
1
-40
Max
36
100
+125
Unit
V
mA
°C
TL431
*SO-8 is a future package
Document number: DS35044 Rev. 6 - 2
2 of 14
www.diodes.com
April 2012
© Diodes Incorporated









No Preview Available !

TL431 Даташит, Описание, Даташиты
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Electrical Characteristics (TA = +25°C, unless otherwise noted)
Symbol
Parameter
Test Conditions
Min Typ.
VREF Reference voltage
VKA = VREF,
IKA = 10mA
VDEV
Deviation of reference voltage over VKA = VREF,
full temperature range (Note 5)
IKA = 10mA
ΔVREF
ΔVKA
Ratio of the change in reference
voltage to the change in cathode
voltage
IKA = 10mA
TL431A
TL431B
TA = 0 to 70oC
TA = -40 to +85oC
TA = -40 to +125oC
VKA = 10V to VREF
2.470
2.482
VKA = 36V to 10V
2.495
2.495
6
14
14
-1.4
-1
IREF
ΔIREF
Reference input current
IREF deviation over full temperature
range (Note 7)
IKA = 10mA, R1 = 10K, R2 =
IKA = 10mA,
R1 = 10K,
TA = 0 to 70oC
TA = -40 to +85oC
R2 =
TA = -40 to +125oC
1
0.8
0.8
0.8
IKA(MIN)
Minimum cathode current for
regulation
VKA = VREF
0.4
IKA(OFF) Off-state current
VKA = 36V, VREF = 0V
0.05
|ZKA| Dynamic output impedance (Note 8) VKA = VREF, f = 0Hz
0.2
θJA
Thermal Resistance Junction to
Ambient
SOT23
SOT25
SO-8*
380
250
70
Notes: 7. Deviation of VDEV, and ΔIREF are defined as the maximum variation of the values over the full temperature range.
Max
2.520
2.507
16
34
34
-2.7
-2
4
1.2
2.5
2.5
0.7
0.5
0.5
Unit
V
mV
mV/V
µA
µA
mA
µA
oC/W
The average temperature coefficient of the reference input voltage αVREF is defined as:
Vmax
VDEV
X 106
αVREF
=
VREF @ 25ºC
T2 – T1
ppm/ºC
Where:
T2 – T1 = full temperature change.
Vmin
αVREF can be positive or negative depending on whether the slope is
positive or negative.
VDEV = Vmax - Vmin
Notes: 8. The dynamic output impedance, RZ, is defined as:
ZKA
=
ΔVKA
ΔIKA
T1
When the device is programmed with two external resistors R1 and R2, the dynamic output
impedance of the overall circuit, is defined as:
Temperature
T2
ΔV
Z’ = ΔI
ZKA
1 + R1
R2
TL431
*SO-8 is a future package
Document number: DS35044 Rev. 6 - 2
3 of 14
www.diodes.com
April 2012
© Diodes Incorporated










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