LTC1706EMS-81#TRPBF Linear Technology, LTC1706EMS-81#TRPBF Datasheet - Page 6

• Manufacturer Part Number: LTC1706EMS-81#TRPBF
• Description: IC VID VOLTAGE PROGRAMMER 10MSOP
• Manufacturer: Linear Technology

Specifications of LTC1706EMS-81#TRPBF

• Applications: VID Voltage Programmer
• Voltage - Supply: 2.7 V ~ 5.5 V
• Current - Supply: 0.1µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -

OPERATIO
LTC1706-81
Table 1. VID Inputs and Corresponding Output Voltage
CODE
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
* Represents codes without a defined output voltage as specified in Intel
specifications. The LTC1706-81 interprets these codes as a valid input and
produces an output voltage as follows: (11111) = 2V
6
VID4
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
VID3
GND
GND
GND
GND
GND
GND
GND
GND
Float
Float
Float
Float
Float
Float
Float
Float
GND
GND
GND
GND
GND
GND
GND
GND
Float
Float
Float
Float
Float
Float
Float
Float
U
VID2
GND
GND
GND
GND
Float
Float
Float
Float
GND
GND
GND
GND
Float
Float
Float
Float
GND
GND
GND
GND
Float
Float
Float
Float
GND
GND
GND
GND
Float
Float
Float
Float
VID1
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
VID0
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
GND
Float
OUTPUT
2.05V
2.00V
1.95V
1.90V
1.85V
1.80V
1.75V
1.70V
1.65V
1.60V
1.55V
1.50V
1.45V
1.40V
1.35V
1.30V
3.5V
3.4V
3.3V
3.2V
3.1V
3.0V
2.9V
2.8V
2.7V
2.6V
2.5V
2.4V
2.3V
2.2V
2.1V
*
To program output voltages higher than 2.05V, the range
bit should be set high (VID4 = High). In this range, when
the four VID inputs are low, the output is 3.5V. Each
increasing binary count is equivalent to a decrease of
100mV in the output voltage.
When all five VID inputs are high or floating, such as when
no CPU is present in a system, a regulated 2V output is
generated at V
Each VID input pin is pulled up by a 40k resistor in series
with a diode connected to V
grounded (or driven low) to produce a digital low input. It
can either be floated or connected to V
high input. The series diode is included to prevent the
input from being damaged or clamped when it is driven
higher than V
Voltage Sensing and Feedback Pins
The FB pin is a high impedance node that requires mini-
mum layout distance to reduce extra loading and
unwanted stray pickup.
When used with the LTC1629 or LTC1929, the
LTC1706-81’s FB, SENSE, V
connected, respectively, with the EAIN, V
and SGND pins of the LTC1629 and LTC1929. The result
of this application is a precisely controlled, multiphase,
variable output voltage supply to any low voltage, high
current system such as a powerful personal computer,
workstation or network server. True remote sense capa-
bility is retained in this case.
VID Input Characteristics
The VID inputs should be driven with a maximum V
0.4V and a minimum V
range is not limited to values less than V
internal diode between V
inputs can go higher than V
V
This allows the LTC1706-81 to be fully logic compatible
and operational over a higher input voltage range (less
than the 7V absolute maximum rating).
CC
or damaging the input.
CC
SENSE
.
.
IH
of 1.6V. However, the VID input
CC
CC
and the pull-up resistor, the
CC
CC
without being clamped to
. Therefore, it should be
and GND pins should be
CC
CC
DIFFOUT
. Because of the
to get a digital
, INTV
IL
CC
of