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Fairchild Semiconductor Electronic Components Datasheet

LM431SB Datasheet

Programmable Shunt Regulator

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www.fairchildsemi.com
LM431SA/LM431SB/LM431SC
Programmable Shunt Regulator
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 LM431SA/LM431SB/LM431SC are three terminal
output adjustable regulators with thermal stability over
operating temperature range. The output voltage can be set
any value between VREF (approximately 2.5 volts) and 36
volts with two external resistors. These devices have a
typical dynamic output impedance of 0.2Active output
circuit provides a sharp turn-on characteristic, making these
devices excellent replacement for Zener Diodes in many
applications.
SOT-89
1
1. Ref 2. Anode 3. Cathode
SOT-23F
3
12
1. Cathode 2. Ref 3. Anode
Internal Block Diagram
©2002 Fairchild Semiconductor Corporation
Rev. 1.0.3


Fairchild Semiconductor Electronic Components Datasheet

LM431SB Datasheet

Programmable Shunt Regulator

No Preview Available !

LM431SA/LM431SB/LM431SC
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified.)
Parameter
Cathode Voltage
Cathode current Range (Continuous)
Reference Input Current Range
Thermal Resistance Junction-Air (Note1,2)
MF Suffix Package
ML Suffix Package
Power Dissipation (Note3,4)
MF Suffix Package
ML Suffix Package
Junction Temperature
Operating Temperature Range
Storage Temperature Range
Symbol
VKA
IKA
IREF
RθJA
PD
TJ
TOPR
TSTG
Value
37
-100 ~ +150
0.05 ~ +10
350
220
350
560
150
-25 ~ +85
-65 ~ +150
Note:
1. Thermal resistance test board
Size: 76.2mm * 114.3mm * 1.6mm (1S0P)
JEDEC Standard: JESD51-3, JESD51-7
2. Assume no ambient airflow.
3. TJMAX = 150°C, Ratings apply to ambient temperature at 25°C
4. Power dissipation calculation: PD = (TJ - TA)/RθJA
Recommended Operating Conditions
Parameter
Cathode Voltage
Cathode Current
Symbol
VKA
IKA
Min.
VREF
1.0
Typ.
-
-
Max.
36
100
Unit
V
mA
mA
°C/W
mW
°C
°C
°C
Unit
V
mA
2


Part Number LM431SB
Description Programmable Shunt Regulator
Maker Fairchild Semiconductor
Total Page 10 Pages
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