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regulator diode. TL431 Datasheet |
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Order this document by TL431/D
Programmable
Precision References
The TL431, A, B 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 V
with two external resistors. These devices exhibit a wide operating current
range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 Ω. 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 2.5 V reference makes it convenient to
obtain a stable reference from 5.0 V logic supplies, and since the TL431, A,
B operates as a shunt regulator, it can be used as either a positive or
negative voltage reference.
• Programmable Output Voltage to 36 V
• Voltage Reference Tolerance: ±0.4%, Typ @ 25°C (TL431B)
• Low Dynamic Output Impedance, 0.22 Ω Typical
• Sink Current Capability of 1.0 mA to 100 mA
• Equivalent Full–Range Temperature Coefficient of 50 ppm/°C Typical
• Temperature Compensated for Operation over Full Rated Operating
Temperature Range
• Low Output Noise Voltage
TL431, A, B
Series
PROGRAMMABLE
PRECISION REFERENCES
SEMICONDUCTOR
TECHNICAL DATA
LP SUFFIX
PLASTIC PACKAGE
CASE 29
(TO–92)
123
Pin 1. Reference
2. Anode
3. Cathode
8
1
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
DM SUFFIX
PLASTIC PACKAGE
CASE 846A
(Micro–8)
ORDERING INFORMATION
Device
Operating
Temperature Range
TL431CLP, ACLP, BCLP
TL431CP, ACP, BCP
TL431CDM, ACDM, BCDM
TA = 0° to +70°C
TL431CD, ACD, BCD
TL431ILP, AILP, BILP
TL431IP, AIP, BIP
TL431IDM, AIDM, BIDM
TA = –40° to +85°C
TL431ID, AID, BID
MOTOROLA ANALOG IC DEVICE DATA
Package
TO–92
Plastic
Micro–8
SOP–8
TO–92
Plastic
Micro–8
SOP–8
Cathode 1
N/C 2
N/C 3
N/C 4
8 Reference
7 N/C
6 Anode
5 N/C
(Top View)
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SOP–8)
8
1
Cathode 1
Anode
2
3
N/C 4
8 Reference
7
Anode
6
5 N/C
(Top View)
SOP–8 is an internally modified SO–8 package. Pins 2,
3, 6 and 7 are electrically common to the die attach flag.
This internal lead frame modification decreases power
dissipation capability when appropriately mounted on a
printed circuit board. SOP–8 conforms to all external
dimensions of the standard SO–8 package.
© Motorola, Inc. 1998
Rev 6
1
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Symbol
Reference
(R)
Cathode
(K)
Anode
(A)
TL431, A, B Series
Representative Schematic Diagram
Component values are nominal
Cathode (K)
Reference
(R)
800 800
20 pF
Representative Block Diagram
Reference
(R)
+
–
2.5 Vref
Cathode
(K)
3.28 k
4.0 k
20 pF
2.4 k 7.2 k
1.0 k
800
Anode (A)
This device contains 12 active transistors.
Anode (A)
MAXIMUM RATINGS (Full operating ambient temperature range applies, unless
otherwise noted.)
Rating
Symbol
Value
Unit
Cathode to Anode Voltage
Cathode Current Range, Continuous
Reference Input Current Range, Continuous
Operating Junction Temperature
Operating Ambient Temperature Range
TL431I, TL431AI, TL431BI
TL431C, TL431AC, TL431BC
Storage Temperature Range
Total Power Dissipation @ TA = 25°C
Derate above 25°C Ambient Temperature
D, LP Suffix Plastic Package
P Suffix Plastic Package
DM Suffix Plastic Package
Total Power Dissipation @ TC = 25°C
Derate above 25°C Case Temperature
D, LP Suffix Plastic Package
P Suffix Plastic Package
NOTE: ESD data available upon request.
VKA
IK
Iref
TJ
TA
Tstg
PD
PD
37
–100 to +150
–0.05 to +10
150
–40 to +85
0 to +70
–65 to +150
0.70
1.10
0.52
1.5
3.0
V
mA
mA
°C
°C
°C
W
W
150
10 k
RECOMMENDED OPERATING CONDITIONS
Condition
Cathode to Anode Voltage
Cathode Current
Symbol
VKA
IK
Min
Vref
1.0
Max
36
100
THERMAL CHARACTERISTICS
Characteristic
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Symbol
RθJA
RθJC
D, LP Suffix
Package
178
83
P Suffix
Package
114
41
DM Suffix
Package
240
–
Unit
V
mA
Unit
°C/W
°C/W
2 MOTOROLA ANALOG IC DEVICE DATA
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