Fairchild Semiconductor TL431CP, TL431A Datasheet
TL431/TL431A
Programmable Shunt Regulator
www.fairchildsemi.com
Features
• Programmable Output Voltage to 36 Volts
• Low Dynamic Output Impedance 0.20 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/TL431Aare 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
with two external resistors These devices have a typical
dynamic output impedance of 0.2W Active output circuitry
provides a very sharp turn-on characteristic, making these
devices excel lent replacement for zener diodes in many
applications.
TO-92
1
1. Ref 2. Anode 3. Cathode
8-DIP
1.Cathode 2.3.4.5.7.NC
6.Anode 8.Ref
8-SOP
(approximately 2.5 volts) and 36 volts
REF
1
©2003 Fairchild Semiconductor Corporation
1
1. Cathode 2. 3. 6. 7. Anode
8. Ref 4. 5. NC
Rev. 1.0.3
TL431/TL431A
Internal Block Diagram
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified.)
Parameter Symbol Value Unit
Cathode Voltage V
Cathode Current Range (Continuous) I
Reference Input Current Range I
KA
KA
REF
37 V
-100 ~ +150 mA
-0.05 ~ +10 mA
Power Dissipation
D, LP Suffix Package
P Suffix Package
Operating Temperature Range T
Junction Temperature T
Storage Temperature Range T
P
D
OPR
J
STG
770
1000
mW
mW
-25 ~ +85 °C
150 °C
-65 ~ +150 °C
Recommended Operating Conditions
Parameter Symbol Min Typ Max Unit
Cathode Voltage V
Cathode Current I
KA
KA
V
REF
1.0 - 100 mA
-36V
2
Electrical Characteristics
(TA = +25°C, unless otherwise specified)
TL431/TL431A
Parameter Symbol Conditions
Reference Input Voltage V
Deviation of Reference
Input Voltage OverTemperature (Note 1)
Ratio of Change in
Reference Input Voltage
to the Change in
Cathode Voltage
Reference Input Current I
Deviation of Reference
Input Current Over Full
Temperature Range
Minimum Cathode Current for Regulation
Off - Stage Cathode
Current
Dynamic Impedance
(Note 2)
•T
= -25 °C, T
MIN
MAX
= +85 °C
REF
∆V
REF
∆V
REF
∆V
REF
∆I
REF
I
KA(MIN)VKA=VREF
I
KA(OFF)
Z
/∆TVKA=V
/
KA
/∆T
KA
VKA=V
REF
REF
T
MIN≤TA≤TMAX
IKA
=10mA
IKA=10mA,
R
=10KΩ,R2=∞
1
I
=10mA,
KA
R
=10KΩ,R2=∞
1
T
=Full Range
A
VKA=36V,
V
=0
REF
VKA=V
REF
I
=1 to 100mA
KA
f ≥1.0KHz
, IKA=10mA 2.440 2.495 2.550 2.470 2.495 2.520 V
, IKA=10mA
∆V
V
REF
∆V
10V
,
KA
KA
=10V-
=36V-
TL431 TL431A
Min. Typ. Max. Min. Typ. Max.
-
4.5 17
- - 10 -2.7 - -1.0 -2.7
- -0.5 -2.0 - -0.5 -2.0
-1.54 -1.54µA
-
0.4 1.2
- 0.45 1.0 - 0.45 1.0 mA
- 0.05 1.0 - 0.05 1.0 µA
- 0.15 0.5 - 0.15 0.5 Ω
-
4.5 17 mV
-
0.4 1.2 µA
Unit
mV/V
3
Loading...