LTC1706-82_15 Datasheet, PDF (1/8 Pages) Linear Technology – VID Voltage Programmer for Intel VRM9.0/9.1

FEATURES
s _{Fully Compliant with the Intel VRM9.0/9.1 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 Athlon}^TM _{Processor Power Supply}
LTC1706-82
VID Voltage Programmer
for Intel VRM9.0/9.1
DESCRIPTIO
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 VRM9.0/9.1 specifications.
The LTC1706-82 programs the following Linear Technol-
ogy DC/DC converters: LTC1628, LTC1629, LTC1702,
LTC1735, LTC1735-1, LTC1929 and LTC3729.
For a compact VRM9.0/9.1 solution with up to 60A capa-
bility, see the LTC3732, a 3-phase synchronous controller
with integrated 5-bit VID and MOSFET drivers.
, 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)
V_IN
4.5V TO 22V
FROM
µP
VID0 ^VCC
VID1
SENSE
VID2 LTC1706-82
VID3
FB
VID4 GND
NOTE: UP TO SIX LTC1629s CAN BE PARALLELED
TO DELIVER AS MUCH AS 200A
V_IN
INTV_CC
TG1
SW1
LTC1629
BG1
V_DIFFOUT
PGND
SGND
TG2
EAIN
SW2
L1 R_SENSE1
V_IN
L2 R_SENSE2
BG2
V_IN
4.5V TO 22V
V_OUT
1.10V TO 1.85V
+
UP TO 70A
C_OUT
V_IN
LTC1629 TG1
SW1
BG1
SGND
EAIN
PGND
TG2
SW2
BG2
L3 RSENSE3
V_IN
L4 RSENSE4
1706-82 TA01
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