DC1580A - Schematic

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REVISION HISTORY
ECO
REV
DESCRIPTION
DATE
2
PRODUCTION
02/22/10
APPROVED
Jian L.
E20
A
A
CLKOUT
CLKOUT
E1
R77
E5
0
VIN
PLLIN
PLLIN
VIN+
VIN
J1
R26
OPT
RUN
3
AVP
4
R64
20.0K
OPT
SHT 2 ITEMP
PHASMD
INTVCC 120
2
3
90
DEG
DEG
1
ITEMP
PHASMD
60
DEG
R65
30.1K
4
9
10
R79
JP2
0
C51
OPT
SHT 2 EXTVCC
R48
OPT
SW1
BM
2
R46
100K
3
PS
1
MODE
22
1
2
3
5
6
7
8
5
6
7
8
J3
+ COUT5
330uF
2.5V
1
+ COUT11
OPT
C32
4.7uF
16V
VOUT
1.5V / 50A
TG2
GND
VIN
Q3
RJK0305DPB
BG2
R25
16
SW2
19
BG2
7
SENSE2+
INTVCC
CIN4
CIN6
22uF
22uF
D2
0
4
CMDSH-3
S2+
8
SENSE2-
Q7
RJK0305DPB
TG2
18
BOOST2
B
J4
BG1
4.7uF
4
L2-
C21
0.1uF
L2
C15
BG1
BG1
BG2
BG2
TG1
TG1
TG2
TG2
SW1
SW1
SW2
SW2
S1+
S1+
S1-
S1-
S2+
S2+
S2-
S2-
RS2
1nF
S24
R39
200
R44
OPT
MODE
COUT1
100uF
6.3V
0
4
1
2
3
INTVCC
0.001
VOUT
4
21
17
SW2
14
R42
OPT
D1
R9
0.22uH
Q6
RJK0330DPB
CMDSH-3
23
INTVCC
EXTVCC
INTVCC
Q2
RJK0330DPB
C20
0.1uF
INTVCC
4
INTVCC
C11
ISET
ILIM
GND
TG1
24
BG1
DIFFOUT
20
C
S1+
26
BOOST1
DIFFN
13
C50
1uF
31
DIFFP
EXTVCC
E2
VIN
SW1
E3
EXTVCC
27
28
VFB
PHASMD
12
49.9k
R78
0
TG1
1nF
25
ITEMP
11
R66
TRK/SS
AVP
6
DIFFN
SENSE1+
ITH
5
DIFFP
RS1
32
SENSE1-
1
2
3
2
ITH
GND
E6
L1
5
6
7
8
VFB
R63
J2
VIN-
R40
200
1
2
3
OPT
VIN
4.5V - 14V
L1-
5
6
7
8
C58
RUN
1
22uF
1
2
3
R31
8.45K
B
C42
47pF
30
22uF
C14
1
2
3
TRK/SS
CIN5
CIN2
+ 180uF
16V
4
S1-
PGND
RUN
3.3nF
CIN3
0.22uH
0.001
33
C41
PGOOD
C2
0.1uF
R2
OPT
CLKOUT
TRK/SS
PLLIN
FREQ
R3 0
15
E9
4
0.1uF
29
U1
LTC3856EUH
5
6
7
8
JP1
R28
OPT
5
6
7
8
C17
C38
OPT
CIN1
+ 180uF
16V
2
FREQ
5
6
7
8
3
Q5
RJK0305DPB
1
2
3
OFF
Q1
RJK0305DPB
R7 100K 1%
5
6
7
8
1
2
VIN
R30
200
1
2
3
ON
R29
200
2
R18
2.2
1
VIN
Q8
RJK0330DPB
Q4
RJK0330DPB
CCM
4
SHT 2
C
JP3
MODE
R67
10
E4
R68
10
PGOOD
PGOOD
E14
VO_SNSE13
VO_SNS+
VOUT
D
CUSTOMER NOTICE
COUT2
100uF
6.3V
COUT3
100uF
6.3V
COUT4
100uF
6.3V
+ COUT6
330uF
2.5V
+ COUT7
330uF
2.5V
+ COUT8
330uF
2.5V
+ COUT9
330uF
2.5V
+ COUT10
330uF
2.5V
+ COUT12
OPT
+ COUT13
OPT
+ COUT14
OPT
CONTRACT NO.
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
APPROVALS
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. MI
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
ENG. JIAN L.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
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TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
HIGH EFFICIENCY POLYPHASE
STEP-DOWN POWER SUPPY
SIZE
DATE:
LTC3856EUH
DEMO CIRCUIT 1580A
IC NO.
Wednesday, June 16, 2010
7
REV
SHEET
8
1
2
OF
2
D
OPTIONAL DCR SENSING
TEMPERATURE COMPENSATION NETWORK FOR DCR SENSING
R45
SW1
SHT 1 SW1
S1+ SHT 1
SHT 1
ITEMP1
ITEMP
OPT
R47
OPT
R69
OPT
R61
C52
S1-
L1OPT
RNTC
OPT
2
SHT 1 S1R51
R70
SW2
SHT 1 SW2
S2+ SHT 1
OPT
OPT
1
OPT
R53
OPT
R62
S2-
SHT 1 S2-
L2OPT
NOTE:
WHEN DCR SENSING IS IMPLEMENTED, SHORT RSENSE1
AND RSENSE2. DO NOT STUFF R29,R30,R39 AND R40
LOAD STEP CKT
OPTIONAL BIAS SUPPY
VOUT
VIN
J5
1
C54
100uF
6.3V
C55
BOOST
1uF
16V
5
1
R76
C56
VIN
0
BIAS
ON
G
IOSTEP
CLK
IOSTEP
JP5
OFF
4
SHDN
D4
B0530W
FB
3
A914BYW-150
C57
10uF
10V
R71
2
S
2
L3 15uH
6
3
E7
SW
JP4
GND
Q9
SUD50N03-09P
1
0.022uF
D
EXTVCC SHT 1
D3
CMDSH-3
VOUT
2
3
4
5
C53
100uF
6.3V
U2
LT1616ES6
R72
0.005
R73
0.005
R74
10K
20K
R75
6.65K
CUSTOMER NOTICE
X4
X7
1
1
X5
X6
1
1
USED TO MANUFACTURE THE PCB
REPRESENTS STAND OFFS
1
X9
1
X10
1
X8
Represents
Tooling Holes
on PCB
CONTRACT NO.
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
APPROVALS
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
PCB DES. MI
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
ENG. JIAN L.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
HIGH EFFICIENCY POLYPHASE
STEP-DOWN POWER SUPPLY
SIZE
IC NO.
LTC3856EUH
REV
DEMO CIRCUIT 1580A
DATE:
Thursday, March 25, 2010
SHEET
2
2 OF 2
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