ltc1706-85 Linear Technology Corporation, ltc1706-85 Datasheet

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ltc1706-85

Manufacturer Part Number
ltc1706-85
Description
Vid Voltage Programmer For Intel Vrm 8.5
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
Fully Compliant with the Intel VRM 8.5 VID
Specification
Programs Regulator Output Voltage from 1.05V to
1.825V in 25mV Steps
Programs an Entire Family of Linear Technology
DC/DC Converters with 0.8V References
Built-In 40k Pull-Up Resistors on Program Inputs
Available in MSOP-10 Packaging
Server/Desktop Computers
Multiprocessor Workstations and Servers
Multiphase Processor Power Supply
0.25% Voltage Programming Accuracy
NOTE: UP TO SIX LTC1629s/LTC1929s CAN BE PARALLELED
TO DELIVER AS MUCH AS 200A
FROM
U
P
VID Controlled High Current 4-Phase DC/DC Converter (Simplified Block Diagram)
VID25
VID0
VID1
VID2
VID3
LTC1706-85
V
GND
CC
U
SENSE
FB
INTV
V
SGND
EAIN
I
SGND
EAIN
I
TH
TH
V
DIFFOUT
OS
CC
+
LTC1929
LTC1629
CLKOUT
PLLIN
V
OS
PGND
PGND
SW1
SW2
SW1
SW2
BG1
BG2
BG1
TG1
TG2
TG1
TG2
BG2
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 1.05V and 1.825V
is programmed in 25mV increments.
The LTC1706-85 is designed specifically to program an
entire family of Linear Technology DC/DC converters in full
compliance with the Intel Voltage Regulator Module (VRM)
8.5 specification.
The LTC1706-85 programs the following Linear Technol-
ogy DC/DC converter products: LTC1622, LTC1628,
LTC1629, LTC1702, LTC1735, LTC1735-1, LTC1772,
LTC1773, LTC1778, LTC1929, LTC3728 and LTC3729.
Consult factory for additional DC/DC converter products
compatible with the LTC1706-85.
Pentium is a registered trademark of Intel Corporation.
4.5V TO 22V
, LTC and LT are registered trademarks of Linear Technology Corporation.
VID Voltage Programmer
4.5V TO 22V
V
IN
V
IN
®
1706-85 is a precision, digitally programmed
V
V
IN
IN
R
R
R
R
U
SENSE3
SENSE1
SENSE2
SENSE4
1706-85 TA01
for Intel VRM 8.5
+
C
OUT
LTC1706-85
V
1.05V TO 1.825V
UP TO 80A
OUT
170685f
1

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ltc1706-85 Summary of contents

Page 1

... Depending on the state of the five VID inputs, an output voltage between 1.05V and 1.825V is programmed in 25mV increments. The LTC1706-85 is designed specifically to program an entire family of Linear Technology DC/DC converters in full compliance with the Intel Voltage Regulator Module (VRM) 8.5 specification. ...

Page 2

... Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: All voltages are with respect to GND pin. Note 3: The LTC1706-85 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

... G01 100 –50 1706-85 G03 100 2.5 1706-85 G05 LTC1706-85 Typical Error % vs Temperature V = 1.05V V = 1.325V OUT OUT V = 1.825V OUT 0 50 100 TEMPERATURE ( C) 1706-85 G02 VID Pullup Current vs Temperature V = 3.3V CC VID PIN UNDER TEST = 100 TEMPERATURE ( C) ...

Page 4

... LTC1706- CTIO S VID25 (Pin 1): Programming Input. GND = LOW Float = HIGH. Refer to Table 1 for programming CC information. Connect to associated VID pin of P. VID0 (Pin 2): Programming Input. GND = LOW Float = HIGH. Refer to Table 1 for programming CC information. Connect to associated VID pin of P. ...

Page 5

... The LTC1706-85 programs an output voltage ranging from 1.050V to 1.825V in 25mV steps, depending on the state of the VID input pins. The LTC1706-85 in conjunc- tion with a Linear Technology DC/DC switching regulator can be used to create a high performance voltage regu- lator meeting all the requirements of the Intel VRM 8 ...

Page 6

... GND Float Float Float U TYPICAL APPLICATIO S OPTIONAL SYNC CLOCK VID25 6 SENSE 2 VID0 100pF FROM 3 LTC1706-85 VID1 P 4 VID2 VID3 GND 12V 1.05V TO 1.825, 30A OUT M1 TO M6: FDS7760A SUMIDA CEP125-IROMC D10: CENTRAL CMDSH-3TR C ...

Page 7

... BG2 DIFFOUT – – BOOST2 SW2 – SENSE2 TG2 1000pF SENSE2 AMPMD 10 10 LTC1706-85 L1 0.002 0. MBRS 10 340T3 150 F, 16V 22 F 16V 2 6. 470 F, 6.3V GND 6.3V KEMET CAP D2 M4 0.47 F MBRS 340T3 M5 ...

Page 8

... LTC1706-85 PACKAGE DESCRIPTIO 0.889 0.127 (.035 .005) 5.23 3.2 – 3.45 (.206) (.126 – .136) MIN 3.05 0.38 0.50 (.0197) (.0120 .0015) TYP BSC RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006" ...

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