LX1670CD

LX1670CD Datasheet

LX1670

Part	Datasheet
LX1670CD	LX1670CD (pdf)

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L I N D O C # 1670 LX1670 5-BI T PROGRAMMABLE VOLTAGE REFERENCE PR O D U C T I O N DATASHEET The LX1670 is a complete precision reference and voltage monitor circuit for the Intel 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 L I C AT I O N O F T H E L X 1 6 7 0 A 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 LX1670 VSENSE VIDO OVOUT PGOOD System Output Voltage To PWM Error Amplifier SCR Drive Power Good PA C K A G E O R D E R I N F O TA °C 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 LX1670 PRODUCT DATABOOK 1996/1997 5-BI T PROGRAMMABLE VOLTAGE REFERENCE PRODUCTION DATA SHEET A B S O L U T E M A X I M U M R AT I N G S Note 1 Supply Voltage V -0.3V to +15V CC

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L I N D O C # 1670

LX1670
5-BI T PROGRAMMABLE VOLTAGE REFERENCE PR O D U C T I O N DATASHEET

The LX1670 is a complete precision reference and voltage monitor circuit for the Intel 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 L I C AT I O N O F T H E L X 1 6 7 0

A 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

LX1670

VSENSE

VIDO OVOUT PGOOD

System Output Voltage

To PWM Error Amplifier

SCR Drive

Power Good

PA C K A G E O R D E R I N F O

TA °C

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

LX1670

PRODUCT DATABOOK 1996/1997
5-BI T PROGRAMMABLE VOLTAGE REFERENCE PRODUCTION DATA SHEET

A B S O L U T E M A X I M U M R AT I N G S Note 1

Supply Voltage V -0.3V to +15V CC

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived LX1670CD Datasheet file may be downloaded here without warranties.

Datasheet ID: LX1670CD 648555