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TL431CD

P1-P3P4-P6P7-P9P10-P10
©2011 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.4
Features
• Programmable Output Voltage to 36 Volts
• Low Dynamic Output Impedance 0.2
Ω Typical
• Sink Current Capability of 1.0 to 100mA
• Equivalent Full-Range Temperature Coefficient of
50ppm/°C Typical
• Temperature Compensated For Operation Over Full Rated
Operating Temperature Range
• Low Output Noise Voltage
• Fast Turn-on Response
Description
The TL431/TL431A are three-terminal adjustable regulator
series with a guaranteed thermal stability over applicable
temperature ranges. The output voltage may be set to any
value between V
REF
(approximately 2.5 volts) and 36 volts
with two external resistors These devices have a typical
dynamic output impedance of 0.2
Ω. Active output circuitry
provides a very sharp turn-on characteristic, making these
devices excel lent replacement for zener diodes in many
applications.
TO-92
8-DIP
8-SOP
1. Ref 2. Anode 3. Cathode
1. Cathode 2. 3. 6. 7. Anode
8. Ref 4. 5. NC
1
1
1
1.Cathode 2.3.4.5.7.NC
6.Anode 8.Ref
TL431/TL431A
Programmable Shunt Regulator
TL431/TL431A
2
Internal Block Diagram
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified.)
Recommended Operating Conditions
Parameter Symbol Value Unit
Cathode Voltage V
KA
37 V
Cathode Current Range (Continuous) I
KA
-100 ~ +150 mA
Reference Input Current Range I
REF
-0.05 ~ +10 mA
Power Dissipation
D, LP Suffix Package
P Suffix Package
P
D
770
1000
mW
mW
Operating Temperature Range T
OPR
-25 ~ +85 °C
Junction Temperature T
J
150 °C
Storage Temperature Range T
STG
-65 ~ +150 °C
Parameter Symbol Min Typ Max Unit
Cathode Voltage V
KA
V
REF
-36V
Cathode Current I
KA
1.0 - 100 mA
+
-
TL431/TL431A
3
Electrical Characteristics
(T
A
= +25°C, unless otherwise specified)
•T
MIN
= -25
°C, T
MAX
= +85
°C
Parameter Symbol Conditions
TL431 TL431A
Unit
Min. Typ. Max. Min. Typ. Max.
Reference Input Voltage V
REF
V
KA
=V
REF
, I
KA
=10mA 2.440 2.495 2.550 2.470 2.495 2.520 V
Deviation of Reference
Input Voltage Over-
Temperature (Note 1)
ΔV
REF
/
ΔT
V
KA
=V
REF
, I
KA
=10mA
T
MIN
≤T
A
≤T
MAX
-4.517 -4.517mV
Ratio of Change in
Reference Input Voltage
to the Change in
Cathode Voltage
ΔV
REF
/
ΔV
KA
I
KA
=10mA
ΔV
KA
=10V-
V
REF
- - 1.0 -2.7 - -1.0 -2.7
mV/V
ΔV
KA
=36V-
10V
- -0.5 -2.0 - -0.5 -2.0
Reference Input Current I
REF
I
KA
=10mA,
R
1
=10KΩ,R
2
=∞
-1.54 -1.54μA
Deviation of Reference
Input Current Over Full
Temperature Range
ΔI
REF
/ΔT
I
KA
=10mA,
R
1
=10KΩ,R
2
=∞
T
A
=Full Range
- 0.4 1.2 - 0.4 1.2 μA
Minimum Cathode Cur-
rent for Regulation
I
KA(MIN)
V
KA
=V
REF
- 0.45 1.0 - 0.45 1.0 mA
Off - Stage Cathode
Current
I
KA(OFF)
V
KA
=36V, V
REF
=0 - 0.05 1.0 - 0.05 1.0 μA
Dynamic Impedance
(Note 2)
Z
KA
V
KA
=V
REF
,
I
KA
=1 to 100mA
f ≥1.0KHz
- 0.15 0.5 - 0.15 0.5 Ω
P1-P3P4-P6P7-P9P10-P10

TL431CD

Mfr. #:
Buy TL431CD
Manufacturer:
Texas Instruments
Description:
Voltage References Adj Shunt
Lifecycle:
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