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LTC1706-82 Datasheet, PDF (1/8 Pages) Linear Technology – VID Voltage Programmer for Intel VRM 9.0
FEATURES
s Fully Compliant with the Intel VRM 9.0 VID
Specification
s Programs Regulator Output Voltage from 1.10V to
1.85V in 25mV Steps
s Programs an Entire Family of Linear Technology
DC/DC Converters
s ±0.25% Accurate Voltage Divider
s Built-In 40k Pull-Up Resistors on Program Inputs
s Available in MSOP-10 Packaging
U
APPLICATIO S
s Intel Pentium® III Processor Power Supply
s Multiprocessor Workstations and Servers
s Multiphase Processor Power Supply
s AMD AthlonTM Processor Power Supply
Final Electrical Specifications
LTC1706-82
VID Voltage Programmer
for Intel VRM 9.0
DESCRIPTIO
January 2000
The LTC®1706-82 is a precision, digitally programmed,
resistive ladder which adjusts the output of any 0.8V
referenced regulator. Depending on the state of the five
VID inputs, an output voltage between 1.10V and 1.85V is
programmed in 25mV increments.
The LTC1706-82 is designed specifically to program an
entire family of Linear Technology DC/DC converters in full
compliance with the Intel Desktop VID specification.
The LTC1706-82 programs the following Linear Technol-
ogy DC/DC converter products: LTC1622, LTC1628,
LTC1629, LTC1702, LTC1735, LTC1735-1, LTC1772 and
LTC1929.
Consult factory for future compatible DC/DC converter
products.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
AMD Athlon is a trademark of Advanced Micro Devices, Inc.
TYPICAL APPLICATIO
VID Controlled High Current 4-Phase DC/DC Converter (Simplified Block Diagram)
VIN
4.5V TO 22V
FROM
µP
VID0 VCC
VID1
SENSE
VID2 LTC1706-82
VID3
FB
VID4 GND
UP TO SIX LTC1629s CAN BE PARALLELED
TO DELIVER AS MUCH AS 200A
VIN
INTVCC
TG1
SW1
LTC1629
BG1
VDIFFOUT
PGND
SGND
TG2
EAIN
SW2
L1 RSENSE1
VIN
L2 RSENSE2
BG2
VIN
4.5V TO 22V
VOUT
1.10V TO 1.85V
+
UP TO 70A
COUT
VIN
LTC1629 TG1
SW1
BG1
SGND
EAIN
PGND
TG2
SW2
BG2
L3 RSENSE3
VIN
L4 RSENSE4
1706-82 TA01
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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