LTC1706EMS-63#TRPBF [Linear]
LTC1706-63 - 5-Bit VID Voltage Programmer for Sun CPUs; Package: MSOP; Pins: 10; Temperature Range: -40°C to 85°C;型号: | LTC1706EMS-63#TRPBF |
厂家: | Linear |
描述: | LTC1706-63 - 5-Bit VID Voltage Programmer for Sun CPUs; Package: MSOP; Pins: 10; Temperature Range: -40°C to 85°C 光电二极管 |
文件: | 总8页 (文件大小:151K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LTC1706-63
5-Bit VID Voltage
Programmer for SunCPUs
U
FEATURES
DESCRIPTIO
The LTC®1706-63 is a precision, digitally programmed,
resistive ladder which adjusts the output of any 0.6V
referenced regulator. Depending on the state of the five
VIDinputs,anoutputvoltagebetween1.025Vand1.4125V
is programmed in 12.5mV increments.
■
Programs Regulator Output Voltage Range from
1.025V to 1.4125V in 12.5mV Steps
■
Programs a Wide Range of Linear Technology
DC/DC Converters with a 0.6V Reference
■
±0.35% Accurate Output Voltage
■
Built-In 40k Pull-Up Resistors on VID Inputs
The LTC1706-63 is designed specifically to program
an entire family of Linear Technology DC/DC converters
withonboard0.6Vreferences.Pleaseseetherelatedparts
list at the end of the data sheet.
■
Available in MSOP-10 Package
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APPLICATIO S
SunTM Processor Power Supply
For a 2-phase synchronous controller with on-board
LTC1706-63, see the LTC3819.
■
■
Workstations and Servers
■
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Large Memory Array Supply
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TYPICAL APPLICATIO
5-Bit VID-Controlled High Current Application (Simplified Block Diagram)
V
IN
4.5V TO 22V
V
IN
LTC1629-6
TG1
SW1
L1
L2
R
V
SENSE1
SENSE2
OUT
1.025V TO 1.4125V
UP TO 80A
V
CC
VID0
VID1
VID2
VID3
VID4
+
INTV
V
CC
BG1
C
OUT
SENSE
V
IN
DIFFOUT
SGND
PGND
FROM
µP
LTC1706-63
TG2
SW2
BG2
FB
EAIN
R
GND
I
TH
V
IN
4.5V TO 22V
V
IN
LTC1629-6
TG1
SW1
R
L3
L4
SENSE3
BG1
V
IN
PGND
SGND
EAIN
TG2
SW2
BG2
R
SENSE4
I
TH
1706-63 TA01
170663f
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LTC1706-63
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ABSOLUTE MAXIMUM RATINGS
PACKAGE/ORDER INFORMATION
(Note 1)
TOP VIEW
(Voltages Referred to GND Pin)
VID0
VID1
VID2
VID3
1
2
3
4
5
10 FB
Input Supply Voltage (VCC) ..........................–0.3V to 7V
VID Input Pins .............................................–0.3V to 7V
SENSE Pin ...................................................–0.3V to 7V
FB Pin ..........................................................–0.3V to 7V
Operating Ambient Temperature Range
9
8
7
6
GND
NC
VID4
SENSE
V
CC
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 110°C, θJA = 120°C/ W
(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
MS PART MARKING
LTBXM
ORDER PART NUMBER
LTC1706EMS-63
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are T = 25°C.
A
2.7V ≤ V ≤ 5.5V, VID0 = VID1 = VID2 = VID3 = VID4 = NC unless otherwise specified.
CC
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP MAX UNITS
V
Operating Supply Voltage Range
Supply Current
Resistance Between SENSE and FB
2.7
5.5
5
7
V
µA
kΩ
%
CC
I
(Note 3)
0.1
5
VCC
R
V
●
●
3
FB-SENSE
Error % Output Voltage Accuracy
–0.35
+ 0.35
OUT
R
VID
VID Input Pull-Up Resistance
VID Input Voltage Threshold
V
V
V
= 0.6V (Note 4)
DIODE
40
kΩ
V
V
PULLUP
(2.7V ≤ V ≤ 5.5V)
0.4
TH
IL
CC
(2.7V ≤ V ≤ 5.5V)
1.6
IH
CC
I
V
VID Input Leakage Current
VID Pull-Up Voltage
V
V
V
< VID < 7V (Note 4)
= 3.3V
= 5V
0.01
2.8
4.5
±1
µA
V
V
VID-LEAK
CC
PULLUP
CC
CC
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 3: With all five VID inputs floating, the V supply current is simply
CC
the device leakage current. However, the V supply current will rise and
CC
be approximately equal to the number of grounded VID input pins times
Note 2: The LTC1706EMS-63 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.
(V – 0.6V)/40k. (See the VID Input Characteristics section for more
CC
details.)
Note 4: Each built-in pull-up resistor attached to the VID inputs also has a
series diode connected to V to allow input voltages higher than the V
CC
CC
supply without damage or clamping. (See Operation section for further
details.)
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LTC1706-63
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TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Supply Voltage
I
vs Temperature
Supply Current vs Temperature
VID-PULLUP
1.0
0.5
0
2.0
1.5
1.0
0.5
0
140
120
100
80
ALL VID INPUTS OPEN
A
ALL VID INPUTS OPEN
V
= 5V
CC
T
= 25°C
VID4 = 0V
VID0 = VID1 = VID2 = VID3 = OPEN
V
= 5V
CC
V
= 3.3V
60
CC
V
= 2.7V
CC
40
20
2.5 3.0
3.5 4.0
4.5 5.0 5.5 6.0
–50
0
50
100
–50
0
50
100
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
1706-63 G03
1706-63 G02
1706-63 G01
VID
VID Sense Accuracy vs
Temperature
VID Sense Accuracy
R
vs Temperature
FB1
0.35
0.25
5.500
5.250
5.000
4.975
4.950
0.35
0.25
V
CC
= 5.5V
0.15
0.15
V
= 1.225V
SENSE
V
V
= 5.5V
CC
0.05
0.05
V
= 1.025V
SENSE
= 2.7V
CC
–0.05
–0.15
–0.25
–0.35
–0.05
–0.15
–0.25
–0.35
V
= 1.4125V
SENSE
–40 –20
0
20 40
80 100
–60
60
–50
0
50
100
0.975
1.175
1.375
1.575
0.775
TEMPERATURE (°C)
TEMPERATURE (°C)
SENSE VOLTAGE (V)
1706-63 G05
1706-63 G06
1706-63 G04
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U
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PIN FUNCTIONS
VID0 (Pin 1): LSB Programming Input. Low = GND,
High = VCC or Float. Grounding VID0 adds 12.5mV
to the output sense voltage.
VCC (Pin 5): Power Supply Voltage. Range from 2.7V to
5.5V.
SENSE (Pin 6): Regulator Output Voltage. Connect
directly to regulator output sense node.
VID1 (Pin 2): 4th MSB Programming Input. Low = GND,
High = VCC or Float. Grounding VID1 adds 25mV
to the output sense voltage.
VID4 (Pin 7): MSB Programming Input. Low = GND, High
= VCC or Float. Grounding VID4 adds 200mV to the output
sense voltage.
VID2 (Pin 3): 3rd MSB Programming Input. Low = GND,
High = VCC or Float. Grounding VID2 adds 50mV
to the output sense voltage.
NC (Pin 8): No Connect.
GND (Pin 9): Ground. Connect to regulator signal ground.
FB(Pin10):FeedbackInput. Connecttothe0.6Vfeedback
VID3 (Pin 4): 2nd MSB Programming Input. Low = GND,
High = VCC or Float. Grounding VID3 adds 100mV
to the output sense voltage.
pin of a compatible regulator.
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LTC1706-63
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PIN FUNCTIONS
NOMINAL (V)
TYP
ABSOLUTE MAX (V)
PIN
1
NAME
VID0
VID1
VID2
VID3
DESCRIPTION
MIN
0
MAX
MIN
–0.3
–0.3
–0.3
–0.3
–0.3
–0.3
–0.3
MAX
LSB Programmable Input
4th MSB Programmable Input
3rd MSB Programmable Input
2nd MSB Programmable Input
Power Supply
V
V
V
V
7
7
7
7
7
7
7
CC
CC
CC
CC
2
0
3
0
4
0
5
V
2.7
0.8
0
5.5
CC
6
SENSE
VID4
NC
Regulator Output Voltage
1st MSB Programmable Input
1.55
7
V
CC
8
9
GND
FB
Ground
0
–0.3
–0.3
7
7
10
0.6V Feedback Input
0
0.6
1.5
W
BLOCK DIAGRA
V
CC
CC
CC
CC
40k
40k
40k
40k
VID0
VID1
VID2
VID3
1
2
3
4
V
CC
V
V
V
5
6
SENSE
R
R
FB1
FB2
10 FB
SWITCH
CONTROL
LOGIC
9
GND
1706-63 BD
V
CC
40k
VID4
7
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OPERATIO
The LTC1706-63 is a 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
LTC1706-63 produces an output voltage ranging from
1.025V to 1.4125V in 12.5mV steps by closing the loop
between the output voltage sense and the feedback input of
the regulator with the appropriate resistive divider network.
The “top” feedback resistor, RFB1, connected between
SENSE and FB, is typically 5k and is not modified by the
state of the VID program inputs.
The “bottom” feedback resistor, RFB2, however, is modi-
fied by the five VID inputs and is precisely ratioed
to RFB1
.
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LTC1706-63
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OPERATIO
VID Programming
When all five VID inputs are high or floating, such as when
no CPU is present in a system, a regulated 1.025V output
A list of programmed inputs and their corresponding
output voltages is shown in Table 1. Programming is
accomplished by applying the proper voltage (or float
condition) on the five digital VID inputs.
is generated at VSENSE
.
Each VID input pin is pulled up by a 40k resistor in series
with a diode connected to VCC. Therefore, it should be
grounded (or driven low) to produce a digital low input. It
can either be floated or connected to VCC to get a digital
high input. The series diode is included to prevent the
input from being damaged or clamped when it is driven
higher than VCC.
Table 1. VID Inputs and Corresponding Output Voltage
CODE
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
VID4
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
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
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
GND
GND
Float
Float
GND
GND
Float
Float
GND
GND
Float
Float
GND
GND
Float
Float
GND
GND
Float
Float
GND
GND
Float
Float
GND
GND
Float
Float
GND
GND
Float
Float
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
1.4125V
1.4000V
1.3875V
1.3750V
1.3625V
1.3500V
1.3375V
1.3250V
1.3125V
1.3000V
1.2875V
1.2750V
1.2625V
1.2500V
1.2375V
1.2250V
1.2125V
1.2000V
1.1875V
1.1750V
1.1625V
1.1500V
1.1375V
1.1250V
1.1125V
1.1000V
1.0875V
1.0750V
1.0625V
1.0500V
1.0375V
1.0250V
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 LTC1629-6, the LTC1706-63’s FB,
SENSE, VCC and GND pins should be connected, respec-
tively, with the EAIN, VDIFFOUT, INTVCC and SGND pins of
the LTC1629-6. The result of this application is a precisely
controlled, variable output voltage supply to any low
voltage, high current system such as a powerful personal
computer, workstation or network server.
VID Input Characteristics
The VID inputs should be driven with a maximum VIL of
0.4V and a minimum VIH of 1.6V. However, the VID input
range is not limited to values less than VCC. Because of the
internal diode between VCC and the pull-up resistor, the
inputs can go higher than VCC without being clamped to
VCC or damaging the input.
This allows the LTC1706-63 to be fully logic compatible
and operational over a higher input voltage range (less
than the 7V absolute maximum rating).
When a VID input is grounded, there will be a higher
quiescentcurrentflowfromVCC becauseofaresistorfrom
VCC through a series diode to each one of the inputs. This
increase in quiescent current is calculated from:
IQ = N(VCC – VDIODE)/RPULLUP
NisthenumberofgroundedVIDinputs.VDIODE istypically
0.6V while RPULLUP has a typical pull-up resistance
of 40kΩ.
170663f
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LTC1706-63
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OPERATIO
Inotherwords,eachVIDinputhasatypicalpull-upcurrent
LTC3731 are just a few of the high efficiency step-down
switching regulators that will work equally well with the
LTC1706-63. The LTC3819 is a VID controlled 2-phase
synchronous step-down controller with on-board
LTC1706-63.
of 68µA for a 3.3V system.
Besides the LTC1629-6, the LTC1706-63 also programs
a whole family of LTC DC/DC converters that have an
on-board 0.6V reference. The LTC3714, LTC3778 and
U
TYPICAL APPLICATIO
2-Phase 12V Input, 1.025V to 1.4125V/45A Max Power Supply (LTC3819)
with Adjustable Overvoltage Protection (LTC1706-63)
V
CC
+
V
_
DD CORE
LTC1706-63
SENSE
FB
VID0
VID1
VID2
VID3
VID4
–
+
FROM
µP
OVP
TO SYSTEM
OVERVOLTAGE
PROTECTION
LOGIC
OVP
THRESHOLD
COMPARATOR
PWRGD
ENABLE
RUN/SS
R1
10Ω
D1
C3
LTC3819
BAT54
1nF
1
2
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
12V
IN
RUN/SS
PGOOD
TG1
C2
Q1
×2
C
IN1
+
0.47µF
SENSE1
SENSE1
EAIN
C1
0.1µF
10Ω
GND
10Ω
3
–
SW1
L1
0.8µH
C5
0.47µF
R5
0.002Ω
4
BOOST1
C7 1µF
5
PLLFLTR
PLLIN
FCB
V
IN
R23 48.7k
C9 4.7nF
D2
B320A
6
Q2
×3
C8
0.47µF
CLK1
BG1
INTV
CC
C11
2.2µF
7
D3
BAT54A
EXTV
CC
8
R6 2.2k
+
C12
I
INTV
+
TH
CC
V
_
DD CORE
C10 220pF
10µF
C13
+
9
Q3
×2
SGND
PGND
BG2
0.47µF
C
OUT1
C14 470pF
10
11
12
13
14
15
16
17
18
L2
0.8µH
GND
V
R7
0.002Ω
R24
107k
C15
0.47µF
DIFFOUT
R8
50Ω
R9
50Ω
–
V
V
BOOST2
SW2
OS
OS
+
C16
0.47µF
INTV
COREFB_H
D4
B320A
Q4
×3
CC
–
+
SENSE2
SENSE2
TG2
R12 10Ω
ATTENIN
10Ω
10Ω
Q9 (OPT)
2N7002
C17
1nF
ATTENOUT
NO_CPU
VID0
V
BIAS
C18
0.1µF
VID4
VID3
VID2
VID0
VID1
VID2
VID3
VID4
VID1
COREFB_L
C
C
: SIX 10µF 16V CERAMIC CAPACITORS
OUT1
IN1
: TEN 22µF 6.3V CERAMIC CAPACITORS
L1, L2: SUMIDA CEP125-1R0MC-H
Q1, Q3: TWO Si7448DP IN PARALLEL
Q2, Q4: THREE Si7448DP IN PARALLEL
1706-63 TA03
170663f
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LTC1706-63
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TYPICAL APPLICATIO
1.025V to 1.4125V VID Programmable 15A Power Supply
V
1µF
IN
12V
X5R
CMDSH-3
10µF
16V
X5R
×4
1
2
20
19
18
17
16
15
14
13
12
11
RUN/SS
BOOST
TG
LTC3778
V
ON
IRF7811
0.22µF
100k
3
PGOOD
SW
0.68µH
V
OUT
4
+
1.025V TO 1.4125V
15A
V
SENSE
RNG
1500pF
20k
SP
270µF
2V
5
–
I
SENSE
TH
B320A
IRF7811
22µF
6.3V
X5R
6
×3
FCB
PGND
BG
22pF
7
SGND
0.01µF
4.7µF
X5R
6.3V
8
I
DRV
ON
CC
CC
9
330k
V
INTV
FB
1Ω
10
V
EXTV
V
IN
IN
CC
5V
0.1µF
5
V
CC
1
2
3
4
7
6
VID0
VID1
VID2
VID3
VID4
SENSE
1706-63 TA02
FROM
µP
LTC1706-63
FB
GND
9
10
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PACKAGE DESCRIPTION
MS Package
10-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1661)
3.00 ± 0.102
0.889 ± 0.127
(.035 ± .005)
(.118 ± .004)
(NOTE 3)
0.497 ± 0.076
(.0196 ± .003)
REF
10 9
8
7 6
5.23
3.2 – 3.45
(.206)
(.126 – .136)
MIN
3.00 ± 0.102
(.118 ± .004)
NOTE 4
4.90 ± 0.15
(1.93 ± .006)
DETAIL “A”
0.254
(.010)
0° – 6° TYP
0.50
(.0197)
BSC
0.305 ± 0.038
(.0120 ± .0015)
TYP
GAUGE PLANE
1
2
3
4 5
RECOMMENDED SOLDER PAD LAYOUT
0.53 ± 0.01
(.021 ± .006)
0.86
(.034)
REF
1.10
(.043)
MAX
DETAIL “A”
0.18
(.007)
SEATING
PLANE
NOTE:
0.17 – 0.27
(.007 – .011)
TYP
0.13 ± 0.076
(.005 ± .003)
MSOP (MS) 0802
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
0.50
(.0197)
BSC
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") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
170663f
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
7
LTC1706-63
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TYPICAL APPLICATION
VID Controlled High Current 70A 4-Phase Application
OPTIONAL SYNC
CLOCK IN
L1
1
2
3
4
5
6
7
8
9
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RUN/SS
SENSE1
SENSE1
EAIN
CLKOUT
TG1
5V
+
–
0.003Ω
0.33µF
SW1
1000pF
0.47µF
D1
M1
BOOST1
MBRS
340T3
10Ω
5
PLLFLTR
PLLIN
V
M2
M3
IN
V
CC
1µF
1
2
3
4
7
0.33µF
BG1
VID0
VID1
VID2
VID3
VID4
6
150µF, 16V
× 2
1µF
25V
PHASMD
SENSE
EXTV
CC
47k
D7
D8
+
V
OUT
6800pF
LTC1629-6
22µF
6.3V
I
+
C
1.025V TO
1.4125V
70A
TH
SGND
INTV
CC
OUT
FROM
µP
470µF, 6.3V
+
GND
LTC1706-63
100pF
V
PGND
BG2
× 3
10
11
12
13
14
DIFFOUT
V
V
V
DIFFOUT
–
V
V
OS
OS
–
D2
MBRS
340T3
M4
OS
BOOST2
SW2
100pF
+
0.47µF
FB
+
10
OS
M5
GND
9
M6
1000pF
–
SENSE2
SENSE2
TG2
0.003Ω
+
AMPMD
L2
24k
75k
L3
1
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RUN/SS
CLKOUT
TG1
5V
0.003Ω
+
SENSE1
SENSE1
EAIN
1000pF
10k
3
–
SW1
47pF
D3
MBRS
340T3
4
0.47µF
BOOST1
M7
10Ω
5
PLLFLTR
PLLIN
V
M9
IN
M8
0.01µF
1µF
6
C
BG1
OUT
150µF, 16V
× 2
470µF, 6.3V
× 3
7
PHASMD
EXTV
CC
1µF
25V
D9
47pF
8
LTC1629-6
22µF
6.3V
I
INTV
CC
+
TH
+
+
9
D10
GND
SGND
PGND
BG2
V
IN
12V
10
11
12
13
14
V
DIFFOUT
V
V
V
DIFFOUT
–
–
V
V
D4
MBRS
340T3
OS
OS
BOOST2
SW2
M10
OS
0.47µF
+
+
M12
M11
OS
–
SENSE2
SENSE2
TG2
1000pF
0.003Ω
M1 TO M12: FDS7760A
+
AMPMD
L1 TO L4: 1µH SUMIDA CEPH149-IROMC
D7 TO D10: CENTROI CMDSH-3TR
L4
C
f
: KEMET T510X477M006AS
OUT
: 200kHz
1706-63 TA04
SW
RELATED PARTS
PART NUMBER
LTC1629-6
LTC3714
DESCRIPTION
PolyPhase® Synchronous Step-Down Controller
Single Phase Synchronous Step-Down Controller with VID 0.6V ≤ V
COMMENTS
Up to 12-Phase Operation, Up to 200A Power Supply
≤ 1.75V, I
≤ 1.75V, I
≤ 25A
≤ 40A
OUT
OUT
OUT
LTC3716
2-Phase Synchronous Step-Down Controller with VID
3-Phase, 60A Synchronous Step-Down Controller
0.6V ≤ V
OUT
LTC3731
Single IC 60A Solution with Onboard MOSFET Drivers, ±5% Output
Current Matching for Optimum Thermal Performance and Reliability
On-Board VID and MOSFET Drivers, 0.8V ≤ V ≤ 1.55V, I ≤ 60A
LTC3733
LTC3778
LTC3819
3-Phase, 60A Synchronous Step-Down Controller for
AMD Opteron Processors
OUT
OUT
Optional R
DC/DC Synchronous Controller
Current Mode Operation with R
or MOSFET R
Sensing,
DC(0N)
SENSE
SENSE
4.5V ≤ V ≤ 36V
IN
2-Phase Synchronous Step-Down Controller
1.025V ≤ V
≤ 1.4125V; 40A
OUT
PolyPhase is a registered trademark of Linear Technology Corporation.
170663f
LT 1005 • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
8
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2005
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