ltc1706-61 Linear Technology Corporation, ltc1706-61 Datasheet

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ltc1706-61

Manufacturer Part Number
ltc1706-61
Description
5-bit Vid Voltage Programmer For Amd Opteron Cpus
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Programs Regulator Output Voltage Range from
0.8V to 1.55V in 25mV Steps
Programs a Wide Range of Linear Technology
DC/DC Converters with a 0.6V Reference
Built-In 40k Pull-Up Resistors on VID Inputs
Available in MSOP-10 Package
AMD Opteron
Workstations and Servers
Large Memory Array Supply
0.35% Accurate Output Voltage
FROM
P
TM
Processor Power Supply
U
VID0
VID1
VID2
VID3
VID4
LTC1706-61
5-Bit VID-Controlled High Current Application (Simplified Block Diagram)
GND
V
CC
SENSE
FB
U
INTV
V
SGND
EAIN
I
SGND
EAIN
I
TH
TH
DIFFOUT
CC
LTC1629-6
LTC1629-6
PGND
PGND
SW1
SW2
SW1
SW2
BG2
TG1
BG1
TG2
TG1
BG1
TG2
BG2
V
V
IN
IN
DESCRIPTIO
The LTC
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.)
AMD Opteron is a trademark of Advanced Micro Devices, Inc.
4.5V TO 22V
, LTC and LT are registered trademarks of Linear Technology Corporation.
4.5V TO 22V
V
IN
V
IN
®
1706-61 is a precision, digitally programmed,
Programmer for AMD
V
V
IN
IN
L2
L4
L1
L3
U
R
R
R
R
5-Bit VID Voltage
SENSE3
SENSE1
SENSE2
SENSE4
1706-61 TA01
Opteron CPUs
+
C
OUT
LTC1706-61
V
0.8V TO 1.55V
UP TO 80A
OUT
170661f
1

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ltc1706-61 Summary of contents

Page 1

... 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 ...

Page 2

... LTC1706- ABSOLUTE MAXIMUM (Note 1) (Voltages Referred to GND Pin) Input Supply Voltage (V ) ..........................– 0. VID Input Pins .............................................– 0. SENSE Pin ...................................................– 0. Pin ..........................................................– 0. Operating Ambient Temperature Range (Note 2) .................................................. – Junction Temperature ........................................... 110 C Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec) ...

Page 3

... V or Float. Grounding VID4 adds 400mV to the output CC sense voltage. NC (Pin 8): No Connect. GND (Pin 9): Ground. Connect to regulator signal ground. FB (Pin 10): Feedback Input. Connect to the 0.6V feedback pin of a compatible regulator. LTC1706-61 Supply Current vs Supply Voltage 1.0 ALL VID INPUTS OPEN 0 ...

Page 4

... VID3 4 U OPERATIO The LTC1706- precision resistive divider designed specifically for use with an entire family of Linear Technology Corporation DC/DC switching regulators with 0.6V internal reference and feedback voltage. The LTC1706-61 produces an output voltage ranging from 0.8V to 1.55V 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 5

... Float Float Float *Represents codes without a defined output (shutdown) voltage as specified in AMD specifications. The LTC1706-61 interprets these codes as a valid input and produces an output voltage as follows: (11111) = 0.775V. When all five VID inputs are high or floating, such as when no CPU is present in a system, a regulated 0.775V output ...

Page 6

... SIX 10 F 16V CERAMIC CAPACITORS IN1 C : TEN 22 F 6.3V CERAMIC CAPACITORS OUT1 L1, L2: SUMIDA CEP125-1R0MC-H 6 0.6V reference. The LTC3714, LTC3778 and LTC3731 are just a few of the high efficiency step-down switching regulators that will work equally well with the LTC1706-61 CORE LTC1706-61 SENSE – ...

Page 7

... U MS Package 10-Lead Plastic MSOP (Reference LTC DWG # 05-08-1661) DETAIL “A” 0.254 (.010) 0 – 6 TYP 0.50 (.0197) GAUGE PLANE BSC 0.53 0.01 (.021 .006) DETAIL “A” 0.18 (.007) LTC1706- 12V 10 F 16V X5R 4 IRF7811 0. OUT 0.8V TO 1.55V SP 15A 270 F B320A ...

Page 8

... LTC1706-61 U TYPICAL APPLICATION OPTIONAL SYNC CLOCK VID0 6 SENSE 2 VID1 FROM 3 LTC1706-61 VID2 P 4 VID3 100pF 7 VID4 FB 10 GND M12: FDS7760A SUMIDA CEPH149-IROMC D7 TO D10: CENTROI CMDSH-3TR C : KEMET T510X477M006AS OUT f : 200kHz SW RELATED PARTS PART NUMBER DESCRIPTION ® ...

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