LTC1706EMS-82#TRPBF

LTC1706-82
1
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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.
Intel Pentium
®
III Processor Power Supply
Multiprocessor Workstations and Servers
Multiphase Processor Power Supply
AMD Athlon
TM
Processor Power Supply
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
±0.25% Accurate Voltage Divider
Built-In 40k Pull-Up Resistors on Program Inputs
Available in MSOP-10 Packaging
VID Voltage Programmer
for Intel VRM9.0/9.1
1706-82 TA01
L1 R
SENSE1
V
IN
V
IN
4.5V TO 22V
V
IN
4.5V TO 22V
LTC1629
V
DIFFOUT
SGND
EAIN
INTV
CC
C
OUT
V
IN
TG1
SW1
BG1
PGND
+
V
OUT
1.10V TO 1.85V
UP TO 70A
VID0
VID1
VID2
VID3
VID4
V
CC
LTC1706-82
GND
SENSE
FB
FROM
µP
L2
R
SENSE2
NOTE: UP TO SIX LTC1629s CAN BE PARALLELED
TO DELIVER AS MUCH AS 200A
L3
R
SENSE3
V
IN
LTC1629
SGND
EAIN
V
IN
TG1
SW1
BG1
PGND
L4
R
SENSE4
TG2
SW2
BG2
TG2
SW2
BG2
VID Controlled High Current 4-Phase DC/DC Converter (Simplified Block Diagram)
, 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.
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
LTC1706-82
2
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(Voltages Referred to GND Pin)
Input Supply Voltage (V
CC
) ..........................0.3V to 7V
VID Input Pins .............................................0.3V to 7V
SENSE Pin ...................................................0.3V to 7V
FB Pin ..........................................................0.3V to 7V
Operating Temperature Range (Note 2) .. 40°C to 85°C
Junction Temperature........................................... 110°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ORDER PART
NUMBER
MS PART MARKING
T
JMAX
= 110°C, θ
JA
= 200°C/W
LTMJ
LTC1706EMS-82
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
ELECTRICAL CHARACTERISTICS
The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
2.7V V
CC
5.5V, VID0 = VID1 = VID2 = VID3 = VID4 = NC unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Operating Supply Voltage Range 2.7 5.5 V
I
VCC
Supply Current (Note 3) 0.1 5.0 µA
R
FB-SENSE
Resistance Between SENSE and FB 61014 k
V
OUT
Error % Output Voltage Accuracy Programmed From 1.10V to 1.85V 0.25 0.25 %
R
PULLUP
VID Input Pull-Up Resistance V
DIODE
= 0.6V, (Note 4) 40 k
VID
T
VID Input Voltage Threshold V
IL
(2.7V < V
CC
< 5.5V) 0.4 V
V
IH
(2.7V < V
CC
< 5.5V) 1.6 V
I
VID-LEAK
VID Input Leakage Current V
CC
< VID < 7V, (Note 4) 0.01 ±1.00 µA
V
PULLUP
VID Pull-Up Voltage V
CC
= 3.3V 2.8 V
V
CC
= 5V 4.5 V
Note 3: With all five VID inputs floating, the V
CC
supply current is simply
the device leakage current. However, the V
CC
supply current will rise and
be approximately equal to the number of grounded VID input pins times
(V
CC
– 0.6V)/40k. (See the Applications Information section for more
detail.)
Note 4: Each built-in pull-up resistor attached to the VID inputs also has a
series diode connected to V
CC
to allow input voltages higher than the V
CC
supply without damage or clamping. (See Operation section for further
details.)
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 0°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
1
2
3
4
5
VID0
VID1
VID2
VID3
V
CC
10
9
8
7
6
FB
GND
NC
VID4
SENSE
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC1706-82
3
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TYPICAL PERFOR A CE CHARACTERISTICS
UW
Typical Error % vs Output Voltage Typical Error % vs Temperature
R
FB1
vs Temperature I
VID-PULLUP
vs Temperature
Supply Current vs Temperature Supply Current vs Supply Voltage
OUTPUT VOLTAGE (V)
1.1
ERROR (%)
1706-82 G01
0.25
0
0.25
1.2 1.3 1.4 1.5 1.6 1.7 1.8
T
A
= 25°C
TEMPERATURE (°C)
50 0 50 100
ERROR (%)
1706-82 G02
0.25
0
0.25
V
OUT
= 1.85V
V
OUT
= 1.5V
V
OUT
= 1.1V
TEMPERATURE (°C)
50 0 50 100
R
FB1
(k)
1706-82 G03
30
20
10
0
TEMPERATURE (°C)
50 0 50 100
VID PULL-UP CURRENT (µA)
1706-82 G04
150
130
110
90
70
50
30
V
CC
= 5V
VID4 = 0V
VID0 = VID1 = VID2 = VID3 = OPEN
TEMPERATURE (°C)
50 0 50 100
SUPPLY CURRENT (µA)
1706-82 G05
2.0
1.5
1.0
0.5
0
V
CC
= 2.7V
V
CC
= 5V
ALL VID INPUTS OPEN
V
CC
= 3.3V
SUPPLY VOLTAGE (V)
02468
SUPPLY CURRENT (µA)
1706-82 G06
5
4
3
2
1
0
ALL VID INPUTS OPEN
T
A
= 25°C

LTC1706EMS-82#TRPBF

Mfr. #:
Manufacturer:
Analog Devices / Linear Technology
Description:
Power Management Specialized - PMIC 5-Bit VID Volt Prog VRM 9.0
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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