DC2229A-B - Schematic

5
4
3
2
1
REVISION HISTORY
INTVCCA
ECO
REV
__
VID3
VID2
2
VID4
VID3
H
L
2
VID5
VID4
JP6
H
L
2
1
JP5
1
JP4
H
L
VID_EN
JP7
H
L
VID5
APPROVED
PRODUCTION
MIKE S.
DATE
3-5-15
C1
0.1uF
2
3
VID1
2
1
JP3
H
L
3
VID2
3
3
VID0
2
1
JP2
H
L
3
VID1
3
2
1
1
1
JP1
H
L
3
VID0
DESCRIPTION
2
VID_EN
D
E1
VIN
CIN9
+180uF
16V
R2
OPT
C19
RUN
1
0.22uF 0.22uF
R29
R30
OPT
OPT
1
2
3
1
2
3
5
5
CIN1
22uF
16V
1210
1
2
3
1
2
3
4
+
COUT3
330uF
2.5V
+
COUT4
330uF
2.5V
+
R10
10
COUT5
330uF
2.5V
R15
C11
4.7uF
16V
0805
27
26
R20
0
24
D1
CMDSH-3
2.2
C8
0.1uF
R75
-A
23
Q3
BSC050NE2LS
4
Q11
OPT
1
2
3
4
CIN3
22uF
16V
1210
C20
OPT
BSC010NE2LSI
4
5
Q4
BG2
VOUT_SLAVE
0.6V-1.23V/30A
1.5V/30A
NOT STUFFED
0.6V-1.23V/120A 4 PHASE
CIN4
22uF
16V
1210
SW2
EXTVCCA
VOUT2
-B
D2
CMDSH-3
TG2
C14
0.1uF
VOUT1
4
Q12
OPT
R26
3.32K
B
VOUT2
L2
COUT6
220uF
4V
1206
0.25uH
744301025
R28
665
COUT7
220uF
4V
1206
+
COUT8
330uF
2.5V
+
COUT9
330uF
2.5V
+
C17
10uF J5
6.3V
0805
COUT10
330uF
2.5V
VOUT2-
FSW = 400kHz
R34
10
E8
E9
1
90 DEG
2
INTVCCA
PHASMD
R35
100K
3
A
60 DEG
4
PGOOD1
SGND
R38
100K
PGOOD2
5
R37
10K
E13
PGOOD2
NOTES: UNLESS OTHERWISE SPECIFIED
EXTVCCA
EXTVCCA
E14
4
GND
VO2_SNS+
VO2_SNS-
A
CUSTOMER NOTICE
E10
E11
E12
R36
30.1K
INTVCCA
CLKOUTA
CLKOUTA
INTVCCA
PGOOD1
VOUT2+
J6
R31
0
JP9 INTVCCA
PHASMD
120 DEG
C
OPT
5
INTVCCA
R33
10
R32
OPT
VOUT1+
C5 J3
10uF
0.6V
1.23V / 120A
6.3V
0805
VOUT1J4
0
28
25
CIN2
22uF
16V
1210
COUT2
220uF
4V
1206
1
2
3
29
R9
10
VO1_SNS-
R14
5
30
COUT1
220uF
4V
1206
0.25uH
744301025
Q10
OPT
32
31
E5
VOUT1
VIN-
VO1_SNS+
E3
R12
665
L1
34
22
CLKOUTA
PGOOD2
PGOOD1
PHASMD
MODE_PLLIN
R27
88.7K
4
C6
0.1uF
33
BSC010NE2LSI
1
2
3
C18
Q2
CLKOUT
SW2
PGOOD2
VFB2-
PGOOD1
TG2
2
R8
3.32K
4
5
VID_EN
CHL_SEL
35
36
VID5
37
VID4
38
VID3
39
VID2
VID1
40
41
42
BOOST2
VFB2+
OPT
E7
PLLIN
VID0
TK/SS2
VFB2-
3
BURST
FCM
43
BG2
MODE_PLLIN
PULSE SKIP
SNSDC1+
EXTVCC
ITH2
21
R25
10K
11
ITH1
20
R24
OPT
INTVCC
PHASMD
OPT
VFB1
MODE_PLLIN
9
VIN
12
4
MODE
8
10
C16
VFB2+
7
DIFFOUT
19
C15
OPT
6
BG1
18
R23
OPT
0
JP8
ITH2
C13
OPT
R21
INTVCCA
B
ITH1
C10
3.3nF
5
VOSNS1-
FREQ
E6
C9 100pF
R18
4.02K
C12 OPT
R19
OPT
R17
10K
Q9
OPT
SW1
BG1
BOOST1
RUN
R22
20K
U1
LTC3877EUK
VOSNS1+
17
TK/SS2
4
Q1
BSC050NE2LS
4
CHL_SEL
VID_EN
16
TKSS2
VFB1
C7 OPT
VID4
SW1
ILIM
R16
3
SNS2-
C4
0.1uF
VID3
TG1
13
R11
OPT
VID2
TG1
TK/SS1
SNSA2+
E4
SNSA1+
15
2
SNSD2+
1
R13 0
14
TKSS1
ITEMP1
44
SNS1-
C
VID0
C3
GND
45
C2
VID1
VID5
1
2
3
ITEMP1
5
5
R7
OPT
E2
R4
0
2
R6
OPT
R5
OPT
0.22uF 0.22uF
TK/SS1
GND
J2
R3
OPT
1
2
RN1
OPT
1
RN2
OPT
D
VIN
J1 6V - 14V
CIN10
+180uF
16V
ITEMP1
R1
OPT
VIN+
E26
1. ALL RESISTORS ARE 0603.
2. ALL CAPACITORS ARE 0603.
3. INSTALL SHUNTS ON JUMPERS AS SHOWN.
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
HZ
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG. M. SHRIVER
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
TECHNOLOGY
HIGH CURRENT STEP-DOWN CONVERTER WITH VID
PROGRAMMING AND LOW DCR INDUCTORS
2
IC NO.
N/A
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3
APPROVALS
DATE: MARCH 11, 2014
LTC3877EUK
REV.
2
DC2229A-B
SHEET 1
1
OF 3
5
4
3
2
1
FAULT_SLAVE
INTVCCB
INTVCCB
VIN
FAULT_SLAVE
TG3
1
3
4
Q23
2N7002
BOOST1
SW1
R50
CLKOUTA
INTVCCB
78.7K
R52
EXTVCCB
EXTVCCB
R54
0
E15
19
18
EXTVCCB
17
C25
4.7uF
0805
OPT
1
2
3
1
2
3
CIN5
22uF
1210
16V
15
TG4
C28
0.1uF
29
+
2.2
Q7
BSC050NE2LSI
Q15
OPT
CIN7
22uF
1210
16V
4
1
2
3
R56
0
COUT13
330uF
7343
2.5V
+
COUT14
330uF
7343
2.5V
+
COUT15
330uF
7343
2.5V
VOUT
J7
GND
J8
CIN8
22uF
1210
16V
SW4
R51
OPT
VOUT_SLAVE
OPT
4
BG4
EXTVCCB
BSC010NE2LSI
4
+
COUT18
330uF
7343
2.5V
+
COUT19
330uF
7343
2.5V
+
COUT20
330uF
7343
2.5V
C
L4
Q16
OPT
5
Q8
5
INTVCCB
CIN6
22uF
1210
16V
C24
0.1uF
R77
R49 0
16
COUT12
220uF
1206
D4
CMDSH-3
TG1
GND
R46
D3
CMDSH-3
INTVCCB
COUT16
220uF
1206
4V
0.25uH
744301025
4
1
2
3
9
ITH1
MODE1
21
5
BG1
ISENSE1+
C22
0.1uF
COUT11
220uF
1206
0.25uF
744301025
4
R45 0
22
20
Q14
OPT
L3
1
2
3
ISENSE1-
BSC010NE2LSI
Q6
5
5
EXTVCC
4
5
23
SW0
24
TG0
26
25
FAULT1B
27
LOWDCR
RUN1
PHASMD
8
C
INTVCC
BG3
14
7
RUN0
13
C27
0.22uF
6
VIN
SYNC
R48
OPT
BG0
ISENSE0-
12
5
ISENSE0+
ILIM
0
BOOST0
FREQ
4
FAULT0B
28
ITH0
3
MODE0
11
C23
0.22uF
RUN_SLAVE
2
10
1
C26
47nF
D
SW3
U2
LTC3874IUFD#PBF
CIN11
+OPT
CAP-SVP-F8
R44
0
R43
665
ITH_SLAVE
C21
47pF
R47
R40
OPT
Q13
OPT
4
1
2
3
2
R42
OPT
Q5
BSC050NE2LSI
VIN
R53
665
1
2
3
PGOOD1
D
R41
10K
5
R39
0
TKSS1
1
2
3
E25
5
FAULT_SLAVE
C29
OPT
COUT17
220uF
1206
4V
R55
0
R57
OPT
JUMPERS TO TIE PHASES TOGETHER
B
B
INTVCCA
CHL_SEL
R58
0
ITH1
ITH2
R61 0
ITH_SLAVE
VOUT1
R59 0
1225
R62 0
VFB2R66
0
TKSS1
R68 0
R65
OPT
VFB1
TKSS2
RUN
VOUT2
VOUT_SLAVE
R60 0
1225
R63
0
1225
VFB2+
R64
0
1225
R67 0
RUN_SLAVE
RUN AND RUN _SLAVE DRIVEN WITH DIVIDER ON SHEET3.
R69 OPT
A
A
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
HZ
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG. M. SHRIVER
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
TECHNOLOGY
TITLE: SCHEMATIC
HIGH CURRENT STEP-DOWN CONVERTER WITH VID
PROGRAMMING AND LOW DCR INDUCTORS
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
2
IC NO.
N/A
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE: MARCH 11, 2014
LTC3877EUK
REV.
2
DC2229A-B
SHEET 2
1
OF 3
5
4
3
VOUT1
VOUT1
COUT21
OPT
7343
COUT22
OPT
7343
+
+
COUT23
OPT
7343
+
COUT24
OPT
7343
+
COUT25
OPT
7343
+
Q21
SUM60N02-3m9P
TO-263AB
COUT26
OPT
7343
PULSE GEN1
COUT28
OPT
7343
+
+
COUT29
OPT
7343
+
COUT30
OPT
7343
+
COUT31
OPT
7343
+
GND
COUT32
OPT
7343
COUT33
OPT
7343
COUT34
OPT
7343
+
+
COUT35
OPT
7343
+
COUT36
OPT
7343
+
COUT37
OPT
7343
+
COUT38
OPT
7343
E18
Q22
D
CIN1-8: Murata GRM32ER61C226KE20L (22uF, 16V, X5R, 1210)
CIN9,10: Sanyo 16SVP180MX (180uF, 16V, 30mOhm, 3.0 A RMS)
Use Tepro RN5326 for 0 Ohm, 1225 resistor
COUT39
OPT
7343
COUT40
OPT
7343
+
+
COUT41
OPT
7343
+
COUT42
OPT
7343
+
COUT43
OPT
7343
+
VOUT2
VOUT2
J10
SUM60N02-3m9P
TO-263AB
PULSE GEN2
+
COUT3-5,8-10,13-15,18-20: Panasonic EEFSX0E331ER (330uF, 9mOhms, 2.5V, 7343)
ISTEP1+
R71 E17 LOAD STEP
0.005
5mV / Amp
1%
2010
ISTEP1E19
DYNAMIC LOAD CIRCUIT FOR VOUT2
VOUT_SLAVE
+
J9
R70
10k
1%
VOUT2
COUT27
OPT
7343
L1- 4: Wurth 744301025
(250nH, DCR=0.32mOhms +/- 7%, Isat = 65A typical,
footprint = 11.3mm X 11mm, H = 8.9mm)
VOUT1
COUT1,2,6,7,11,12,16,17: Murata GRM31CR60G227M (220uF, 4V, X5R, 1206)
E16
D
+
1
Notes to PCB designer:
DYNAMIC LOAD CIRCUIT FOR VOUT1
OPTIONAL COUT
+
2
COUT44
OPT
7343
GND
E20
R72
10k
1%
E22
R73
0.005
1%
2010
E21
ISTEP2+
LOAD STEP
5mV / Amp
E23
ISTEP2-
C
C
OPTIONAL DUAL CHANNEL MOSFETS
VIN
Q17
BSG0811ND
OPT
CIN15
OPT
1210
VIN
Q18
BSG0811ND
OPT
SW2
1
SW1
CIN14
OPT
1210
9
CIN13
OPT
1210
9
CIN12
OPT
1210
5
3
6
3
6
2
7
2
7
1
8
1
8
SW2
BG1
TG2
JP10
ON
RUN
OFF
SW3
CIN19
OPT
1210
9
CIN18
OPT
1210
SW4
5
4
5
6
3
6
2
7
2
7
1
8
1
8
BG3
TG4
B
VIN
Q20
BSG0811ND
OPT
3
SW4
R74
0
R78
10.0k
4
10
TG3
Q19
BSG0811ND
OPT
R82
4.22k
R79
OPT
0805
RUN
C33
OPT
1206
R80
OPT
U3 LT6703IDC-3
1
OUT
2
VS
3
4
+INA GND
OPT
BG4
R81
OPT
C34
OPT
10
SW3
9
CIN17
OPT
1210
RUN
C32
OPT
BG2
B
CIN16
OPT
1210
2
RUN_SLAVE
E24
3
4
10
TG1
5
R76
30.1k
10
SW1
4
RUN
A
A
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
HZ
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG. M. SHRIVER
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
TECHNOLOGY
TITLE: SCHEMATIC
HIGH CURRENT STEP-DOWN CONVERTER WITH VID
PROGRAMMING AND LOW DCR INDUCTORS
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
2
IC NO.
N/A
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE: MARCH 11, 2014
LTC3877EUK
REV.
2
DC2229A-B
SHEET 3
1
OF 3
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