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Microsemi Corporation - 5 - BIT PROGRAMMABLE VOTAGE REFERENCE

Numéro de référence LX1670CD
Description 5 - BIT PROGRAMMABLE VOTAGE REFERENCE
Fabricant Microsemi Corporation 
Logo Microsemi Corporation 





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LX1670CD fiche technique
T H E I N F I N I T E P O W E R O F I N N O VAT I O N
L I N D O C #: 1670
LX1670
5-BI T PROGRAMMABLE VOLTAGE REFERENCE
PR O D U C T I O N D ATA S H E E T
DESCRIPTION
The LX1670 is a complete precision
reference and voltage monitor circuit
for the Intel Pentium® Pro Processor
and other high-end microprocessor
supplies. It is designed for use in
conjunction with the LX1660/1661 PWM
controller. The LX1670 reads a 5-bit
voltage identification (VID) code from
the microprocessor and sets the output
voltage reference to be used by the
LX1660/61 controller. Together, they
convert +5 or 12V input power to an
adjustable output ranging from 1.8VDC
to 3.5VDC in 100mV steps (50mV steps
below 2.1V) with 1% DC system
accuracy.
KEY FEATURES
p 1% TOTAL OUTPUT ERROR
p POWER GOOD, UV, 0V COMPARATORS
p 0V COMPARATOR HAS SCR DRIVE
p UNDER-VOLTAGE LOCKOUT CAPABILITY
p 5-BIT INPUT FOR ADVANCED PENTIUM PRO
PROCESSOR APPLICATIONS (5TH BIT IS FOR
AUTOMATIC GAIN AND OFFSET SCALING)
p IMPLEMENTS 1% DC ACCURATE CONTROL
SYSTEM
p 14-PIN NARROW BODY SOIC PACKAGE
PRODUCT HIGHLIGHT
T Y P I C A L A P P L I C AT I O N O F T H E L X 1 6 7 0
VCC
A P P L I C AT I O N S
s PENTIUM II & PENTIUM PRO VOLTAGE
REGULATOR MODULES
s PROGRAMMABLE POWER SUPPLIES
s VOLTAGE REFERENCE
s ADVANCED MICROPROCESSOR SUPPLIES
5-Bit
Digital
Input
Word
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
Enable
Blank Enable
D0
D1
D2
D3
D4
ENABLE
BLKEN
GND
VCC
LX1670
VSENSE
VIDO
OVOUT
PGOOD
System Output
Voltage
To PWM
Error Amplifier
SCR Drive
Power Good
Copyright © 1997
Rev. 1.0 7/97
PA C K A G E O R D E R I N F O
TA (°C)
D
Plastic SOIC
14-pin
0 to 70
LX1670CD
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX1670CDT)
FOR FURTHER INFORMATION CALL (714) 898-8121
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841
1

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