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LM431B

Description
TWO TERM VOLTAGE REFERENCE
Categorysemiconductor    Analog mixed-signal IC   
File Size122KB,12 Pages
ManufacturerFairchild
Websitehttp://www.fairchildsemi.com/
Download Datasheet Parametric Compare View All

LM431B Overview

TWO TERM VOLTAGE REFERENCE

LM431B Parametric

Parameter NameAttribute value
stateACTIVE
terminal coatingNOT SPECIFIED
Analog IC other typesDual voltage reference
www.fairchildsemi.com
LM431A/LM431B/LM431C
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 LM431A/LM431B/LM431C are three terminal output
adjustable regulators with thermal stability over operating
temperature range. The output voltage can be set 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 0.2Ω Active output circuit provides a
sharp turn-on characteristic, making these devices excellent
replacement for Zener Diodes in many applications.
TO-92
1
1. Ref 2. Anode 3. Cathode
8-DIP
8-SOP
1
1
1.Cathode 2.3.4.5.7.NC
6.Anode 8.Ref
1.Cathode 2.3.6.7.Anode
4.5.NC 8.Ref
Internal Block Diagram
REFERENCE
CATHODE
2.5 Vref
ANODE
CATHODE (K)
REFERENCE (R)
ANODE (A)
Rev. 1.0.7
©2003 Fairchild Semiconductor Corporation

LM431B Related Products

LM431B LM431C LM431CIZ LM431BCZ LM431BCM LM431AIM LM431AIZ LM431ACZ LM431ACN
Description TWO TERM VOLTAGE REFERENCE TWO TERM VOLTAGE REFERENCE TWO TERM VOLTAGE REFERENCE TWO TERM VOLTAGE REFERENCE TWO TERM VOLTAGE REFERENCE 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO8 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.495 V, PBCY3 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PBCY3 TWO TERM VOLTAGE REFERENCE
Is it Rohs certified? - - conform to conform to incompatible conform to conform to conform to incompatible
Maker - - Fairchild Fairchild Fairchild Fairchild Fairchild Fairchild Fairchild
Parts packaging code - - TO-92 TO-92 SOIC SOIC TO-92 TO-92 DIP
package instruction - - , SIP3,.1,50 , SIP3,.1,50 SOP-8 SOP, SOP8,.25 , SIP3,.1,50 , SIP3,.1,50 DIP-8
Contacts - - 3 3 8 8 3 3 8
Reach Compliance Code - - unknow unknow unknown unknow compli compli compli
ECCN code - - EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Other features - - OUTPUT VOLTAGE ADJUSTABLE FROM 2.495 TO 36V WITH TWO EXTERNAL RESISTORS OUTPUT VOLTAGE ADJUSTABLE FROM 2.495 TO 36V WITH TWO EXTERNAL RESISTORS OUTPUT VOLTAGE ADJUSTABLE FROM 2.495 TO 36V WITH TWO EXTERNAL RESISTORS OUTPUT VOLTAGE ADJUSTABLE FROM 2.5 TO 36V WITH TWO EXTERNAL RESISTORS OUTPUT VOLTAGE ADJUSTABLE FROM 2.5 TO 36V WITH TWO EXTERNAL RESISTORS OUTPUT VOLTAGE ADJUSTABLE FROM 2.5 TO 36V WITH TWO EXTERNAL RESISTORS OUTPUT VOLTAGE ADJUSTABLE FROM 2.5 TO 36V WITH TWO EXTERNAL RESISTORS
Analog Integrated Circuits - Other Types - - TWO TERMINAL VOLTAGE REFERENCE TWO TERMINAL VOLTAGE REFERENCE TWO TERMINAL VOLTAGE REFERENCE TWO TERMINAL VOLTAGE REFERENCE TWO TERMINAL VOLTAGE REFERENCE TWO TERMINAL VOLTAGE REFERENCE TWO TERMINAL VOLTAGE REFERENCE
JESD-30 code - - O-PBCY-T3 O-PBCY-T3 R-PDSO-G8 R-PDSO-G8 O-PBCY-T3 O-PBCY-T3 R-PDIP-T8
JESD-609 code - - e3 e3 e0 e3 e3 e3 e0
Number of functions - - 1 1 1 1 1 1 1
Output times - - 1 1 1 1 1 1 1
Number of terminals - - 3 3 8 8 3 3 8
Maximum operating temperature - - 85 °C 85 °C 85 °C 85 °C 85 °C 85 °C 85 °C
Minimum operating temperature - - -40 °C -25 °C -25 °C -40 °C -40 °C -25 °C -25 °C
Maximum output current - - 0.1 A 0.1 A 0.1 A 0.1 A 0.1 A 0.1 A 0.1 A
Maximum output voltage - - 2.508 V 2.52 V 2.52 V 2.55 V 2.55 V 2.55 V 2.55 V
Minimum output voltage - - 2.482 V 2.47 V 2.47 V 2.45 V 2.45 V 2.45 V 2.45 V
Nominal output voltage - - 2.495 V 2.495 V 2.495 V 2.5 V 2.5 V 2.5 V 2.5 V
Package body material - - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
Encapsulate equivalent code - - SIP3,.1,50 SIP3,.1,50 SOP8,.25 SOP8,.25 SIP3,.1,50 SIP3,.1,50 DIP8,.3
Package shape - - ROUND ROUND RECTANGULAR RECTANGULAR ROUND ROUND RECTANGULAR
Package form - - CYLINDRICAL CYLINDRICAL SMALL OUTLINE SMALL OUTLINE CYLINDRICAL CYLINDRICAL IN-LINE
Peak Reflow Temperature (Celsius) - - NOT APPLICABLE - NOT SPECIFIED 260 NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
Certification status - - Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
surface mount - - NO NO YES YES NO NO NO
technology - - BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR
Maximum voltage temperature coefficient - - 54.509 ppm/°C 61.942 ppm/°C 61.942 ppm/°C 54.4 ppm/°C 54.4 ppm/°C 61.818 ppm/°C 61.818 ppm/°C
Temperature level - - INDUSTRIAL OTHER OTHER INDUSTRIAL INDUSTRIAL OTHER OTHER
Terminal surface - - Matte Tin (Sn) Matte Tin (Sn) Tin/Lead (Sn/Pb) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Tin/Lead (Sn/Pb)
Terminal form - - THROUGH-HOLE THROUGH-HOLE GULL WING GULL WING THROUGH-HOLE THROUGH-HOLE THROUGH-HOLE
Terminal pitch - - 1.27 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm 2.54 mm
Terminal location - - BOTTOM BOTTOM DUAL DUAL BOTTOM BOTTOM DUAL
Maximum time at peak reflow temperature - - NOT APPLICABLE - NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
Fine-tuning/adjustable output - - YES YES YES YES YES YES YES
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