LTC1706-82_1 LINER [Linear Technology], LTC1706-82_1 Datasheet

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LTC1706-82_1

Manufacturer Part Number
LTC1706-82_1
Description
VID Voltage Programmer for Intel VRM9.0/9.1
Manufacturer
LINER [Linear Technology]
Datasheet
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
Fully Compliant with the Intel VRM9.0/9.1 VID
Specification
Programs Regulator Output Voltage from 1.10V to
1.85V in 25mV Steps
Programs an Entire Family of Linear Technology
DC/DC Converters
Built-In 40k Pull-Up Resistors on Program Inputs
Available in MSOP-10 Packaging
Intel Pentium
Multiprocessor Workstations and Servers
Multiphase Processor Power Supply
AMD Athlon
0.25% Accurate Voltage Divider
NOTE: UP TO SIX LTC1629s CAN BE PARALLELED
TO DELIVER AS MUCH AS 200A
FROM
TM
®
P
Processor Power Supply
III Processor Power Supply
U
VID Controlled High Current 4-Phase DC/DC Converter (Simplified Block Diagram)
VID0
VID1
VID2
VID3
VID4
LTC1706-82
GND
V
CC
SENSE
U
FB
INTV
V
SGND
EAIN
SGND
EAIN
DIFFOUT
CC
LTC1629
LTC1629
PGND
PGND
SW2
SW1
SW1
SW2
BG2
TG1
BG1
TG2
TG1
BG1
BG2
TG2
V
V
IN
IN
DESCRIPTIO
The LTC
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.
Pentium is a registered trademark of Intel Corporation.
AMD Athlon is a trademark of Advanced Micro Devices, Inc.
4.5V TO 22V
4.5V TO 22V
, LTC and LT are registered trademarks of Linear Technology Corporation.
VID Voltage Programmer
V
IN
V
IN
®
1706-82 is a precision, digitally programmed,
V
V
IN
IN
L2
L3
L4
L1
for Intel VRM9.0/9.1
R
R
R
R
SENSE3
SENSE1
SENSE2
SENSE4
U
1706-82 TA01
+
C
OUT
LTC1706-82
V
1.10V TO 1.85V
UP TO 70A
OUT
170682fa
1

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LTC1706-82_1 Summary of contents

Page 1

... 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 ...

Page 2

... PULLUP Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LTC1706-82 is guaranteed to meet performance specifications from Specifications over the – operating temperature range are assured by design, characterization and correlation with statistical process controls ...

Page 3

... Supply Current vs Temperature 2.0 ALL VID INPUTS OPEN 1.5 1 3.3V CC 0.5 0 – TEMPERATURE ( C) 1.7 1.8 1706-82 G01 100 1706-82 G03 V = 2.7V CC 100 1706-82 G05 LTC1706-82 Typical Error % vs Temperature 0. 1.1V OUT V = 1.5V OUT V = 1.85V OUT 0 –0.25 – 100 TEMPERATURE ( C) 1706-82 G02 I vs Temperature VID-PULLUP 150 ...

Page 4

... LTC1706- CTIO S VID0 (Pin 1): LSB Programming Input. Low = GND, High = V or Float. Grounding VID0 adds 25mV to the CC output sense voltage. VID1 (Pin 2): 4th MSB Programming Input. Low = GND, High = V or Float. Grounding VID1 adds 50mV to the CC output sense voltage. ...

Page 5

... VID3 4 U OPERATIO The LTC1706- precision resistive divider designed specifically for use with an entire family of Linear Technol- ogy Corporation DC/DC switching regulators with 0.8V internal reference and feedback voltages. The LTC1706-82 produces an output voltage ranging from 1.10V to 1.85V in 25mV steps by closing the loop between the output voltage sense and the feedback input of the regulator with the appropriate resistive divider network ...

Page 6

... damaging the input. CC This allows the LTC1706- fully logic compatible and operational over a higher input voltage range (less than the 7V absolute maximum rating). When a VID input is grounded, there will be a higher quiescent current flow from Vcc because of a resistor from Vcc through a series diode to each one of the VID inputs ...

Page 7

... U U APPLICATIO S I FOR ATIO Besides the LTC1629, the LTC1706-82 also programs a whole family of LTC DC/DC converters that have an onboard 0.8V reference. The LTC1628, LTC1735, LTC1702, LTC1772, LTC1929 and LTC3729 are just a few of the high efficiency step-down switching regulators that will work equally well with the LTC1706-82. ...

Page 8

... LTC1628/LTC1628-PG Dual High Efficiency, 2-Phase Sync Step-Down Controller ® LTC1629/LTC1629-PG PolyPhase High Efficiency Step-Down DC/DC Controller LTC1702/LTC1703 Dual High Efficiency, 2-Phase Sync Step-Down Controller LTC1706-81 VID Voltage Programmer with Desktop Code LTC1709/LTC1709-8 2-Phase Sync Step-Down Controller with 5-Bit Desktop VID LTC1735 High Efficiency Sync Step-Down Controller ...

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