LTC1706-61 Datasheet, PDF (1/8 Pages) Linear Technology – 5-Bit VID Voltage Programmer for AMD Opteron CPUs

FEATURES
s _{Programs Regulator Output Voltage Range from}
0.8V to 1.55V in 25mV Steps
s _{Programs a Wide Range of Linear Technology}
DC/DC Converters with a 0.6V Reference
s _{±0.35% Accurate Output Voltage}
s _{Built-In 40k Pull-Up Resistors on VID Inputs}
s _{Available in MSOP-10 Package}
U
APPLICATIO S
s _{AMD Opteron}^TM _{Processor Power Supply}
s _{Workstations and Servers}
s _{Large Memory Array Supply}
LTC1706-61
5-Bit VID Voltage
Programmer for AMD
Opteron CPUs
DESCRIPTIO
The LTC^®1706-61 is a precision, digitally programmed,
resistive ladder which adjusts the output of any 0.6V
referenced regulator. Depending on the state of the five
VID inputs, an output voltage between 0.8V and 1.55V is
programmed in 25mV increments.
The LTC1706-61 is designed specifically to program
an entire family of Linear Technology DC/DC converters
with on board 0.6V references.
The LTC1706-61 programs the following Linear
Technology DC/DC converter products: LTC1629-6,
LTC3714, LTC3731 and LTC3778. (Consult factory for
additional DC/DC converter products.)
, LTC and LT are registered trademarks of Linear Technology Corporation.
AMD Opteron is a trademark of Advanced Micro Devices, Inc.
TYPICAL APPLICATIO
5-Bit VID-Controlled High Current Application (Simplified Block Diagram)
FROM
µP
VID0 ^VCC
VID1
SENSE
VID2 LTC1706-61
VID3
FB
VID4 GND
V_IN
4.5V TO 22V
V_IN
LTC1629-6 TG1
SW1
L1 R_SENSE1
INTV_CC
BG1
V_DIFFOUT
PGND
V_IN
SGND
TG2
EAIN
SW2
I_TH
BG2
L2 R_SENSE2
V_IN
4.5V TO 22V
V_OUT
0.8V TO 1.55V
+
UP TO 80A
C_OUT
V_IN
LTC1629-6 TG1
SW1
BG1
SGND
EAIN
I_TH
PGND
TG2
SW2
BG2
L3 RSENSE3
V_IN
L4 R_SENSE4
1706-61 TA01
170661f
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