Part Number : LX6431


Manufactures : Microsemi Corporation

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LX6431 image

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Description :

LX6431/LX6431A/LX6431B PRECISION PROGRAMMABLE REFERENCES DESCRIPTION The LX6431 series precision adjustable three terminal shunt voltage regulators are pin-to-pin compatible with the industry standard TL431, but with significant improvements. The LX6431 design has eliminated regions of instability common to older generation shunt regulator products like the TL431. Designs are made simpler by eliminating the task of insuring capacitive loads, and output voltage and cathode currents don’t combine for unstable operation. The capacitor value is chosen simply to give the best load transient response without the possibility of instability. A lower reference input current allows the use of higher value reference divider resistors, reducing the current drain from batteries in portable equipment as well as reducing the voltage programming errors due to the impedance of the divider network (See Product Highlight figure below). In addition, the LX6431B has an improved initial accuracy of 0.4%, and the output voltage is programmable by using two external resistors from 2.5V to 36V. These devices offer low output impedance for improved load regulation. The typical output impedance of these devices is 100mΩ. The reduced reference input bias current and minimum operating currents make these devices suitable for portable and micropower applications. K E Y F E AT U R E S s Unconditionally Stable For All Cathode To Anode Capacitance Values s Reduced Reference Input Current Allowing The Use Of Higher Value Divider Resistors (0.5µA Max.) s Initial Voltage Reference Accuracy Of 0.4% (LX6431B) s Sink Current Capability 0.6mA to 100mA s Typical Output Dynamic Impedance Less Than 100mΩ s Adjustable Output Voltage From 2.5V to 36V NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com. PRODUCT HIGHLIGHT O U T P U T V O L TA G E E R R O R 20 18 16 14 DUE TO I REF T Y P I C A L P R O G R A M M A B L E V O LTA G E REFERENCE CIRCUIT VIN R1 VKA % Error 12 10 8 6 4 2 0 2.5 3.75 5 6.25 7.5 8.75 LX6431 R2 GND 10 11.25 (VKA) Output Voltage – (V) 12.5 13.75 15 PA C K A G E O R D E R I N F O R M A T I O N TA (°C) 0 to 70 Initial Tolerance 2% 1% 0.4% 2% 1% 0.4% SOIC DM Plastic 8-pin LX6431CDM LX6431ACDM LX6431BCDM LX6431IDM LX6431AIDM LX6431BIDM TO-92 LP Plastic 3-pin LX6431CLP LX6431ACLP LX6431BCLP LX6431ILP LX6431AILP LX6431BILP -40 to 85 Note: All surface-mount packages are available in Tape & Reel. Append the letter “T” to part number. (i.e. LX5212CDPT) TO-92 (LP) package also available in ammo-pack. Copyright © 1999 Rev. 1.4 6/99 LINFINITY MICROELECTRONICS INC. 11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570 1 PRODUCT DATABOOK 1996/1997 LX6431/LX6431A/LX6431B PRECISION PROGRAMMABLE REFERENCES P R O D U C T I O N D A T A S H E E T ABSOLUTE MAXIMUM RATINGS (Note 1) PACK […]

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LX6431 Datasheet

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