DC2229A-A - 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.
VID_EN
D
E1
VIN
CIN9
+180uF
16V
R2
OPT
2
C19
1
0.22uF 0.22uF
R29
R30
OPT
OPT
1
2
3
1
2
3
5
5
R9
10
+
COUT3
330uF
2.5V
+
COUT4
330uF
2.5V
+
R10
10
COUT5
330uF
2.5V
VOUT1+
C5 J3
10uF
0.6V
1.23V / 30A
6.3V
0805
VOUT1J4
R15
INTVCCA
C11
4.7uF
16V
0805
27
26
D1
CMDSH-3
D2
CMDSH-3
2.2
C8
0.1uF
R75
-A
VOUT1
VOUT2
VOUT_SLAVE
0.6V-1.23V/30A
1.5V/30A
NOT STUFFED
-B
OPT
0.6V-1.23V/120A 4 PHASE
0
24
TG2
C14
0.1uF
23
Q3
BSC050NE2LS
4
5
R20
Q11
OPT
1
2
3
4
CIN3
22uF
16V
1210
CIN4
22uF
16V
1210
EXTVCCA
C20
OPT
Q4
BG2
BSC010NE2LSI
4
5
SW2
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
FSW = 400kHz
R34
10
E9
1
90 DEG
2
INTVCCA
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
1.5V / 30A
VOUT2-
E8
PHASMD
VOUT2+
J6
R31
0
JP9 INTVCCA
PHASMD
120 DEG
C
0
R33
10
R32
OPT
VO1_SNS-
R14
28
25
CIN2
22uF
16V
1210
COUT2
220uF
4V
1206
1
2
3
29
COUT1
220uF
4V
1206
0.25uH
744301025
CIN1
22uF
16V
1210
1
2
3
1
2
3
34
CLKOUTA
RUN
PGOOD2
R27
PGOOD1
88.7K
PHASMD
MODE_PLLIN
4
5
30
E5
VOUT1
VIN-
VO1_SNS+
E3
R12
665
L1
Q10
OPT
32
CLKOUT
22
PGOOD2
SW2
BSC010NE2LSI
4
5
VID_EN
CHL_SEL
35
36
VID5
37
VID4
39
38
VID3
VID1
40
41
42
VFB2-
C18
E7
PLLIN
VID0
TG2
OPT
Q2
C6
0.1uF
33
31
R8
3.32K
4
1
2
3
BURST
FCM
BOOST2
VFB2+
VFB2-
3
43
TK/SS2
MODE_PLLIN
PULSE SKIP
SNSDC1+
BG2
PGOOD1
R25
10K
11
ITH2
21
R24
10K
EXTVCC
20
15K
ITH1
PHASMD
9
INTVCC
12
4
MODE
8
10
C16
VFB2+
7
VFB1
MODE_PLLIN
C15
0.1uF
6
VIN
19
R23
OPT
0
JP8
ITH2
R21
INTVCCA
B
ITH1
DIFFOUT
18
C9 100pF
R18
C10
3.3nF
4.75K
C12 47pF
R19
C13
2.2nF
10.7K
5
FREQ
E6
R17
10K
BG1
RUN
R22
20K
VOSNS1-
Q9
OPT
SW1
BG1
BOOST1
17
TK/SS2
4
U1
LTC3877EUK
OPTIONAL
VOSNS1+
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
TK/SS1
14
TKSS1
ITEMP1
44
SNS1-
C
VID0
C3
GND
45
C2
VID1
VID2
0.22uF 0.22uF
VID5
1
2
3
ITEMP1
5
5
R7
OPT
E2
R4
0
2
R6
OPT
R5
OPT
D
GND
J2
R3
OPT
1
2
RN1
OPT
1
RN2
OPT
VIN+
VIN
J1 6V - 14V
CIN10
+180uF
16V
ITEMP1
R1
OPT
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
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-A
SHEET 1
1
OF 3
5
4
3
2
1
FAULT_SLAVE
INTVCCB
INTVCCB
VIN
FAULT_SLAVE
TG3
1
ISENSE1+
BOOST1
SW1
CLKOUTA
R52
EXTVCCB
R54
OPT
E15
GND
C25
OPT
0805
17
R49
16
OPT
5
5
1
2
3
1
2
3
CIN5
OPT
1210
C24
OPT
D4
OPT
R77
COUT12
OPT
1206
CIN6
OPT
1210
VOUT_SLAVE
+
OPT
C28
OPT
29
TG4
Q15
OPT
CIN7
OPT
1210
4
CIN8
OPT
1210
SW4
R51
OPT
R56
OPT
BG4
EXTVCCB
OPT
4
COUT14
OPT
7343
+
COUT15
OPT
7343
VOUT_SLAVE+
J7
OPT
VOUT_SLAVEOPT
+
COUT18
OPT
7343
+
COUT19
OPT
7343
+
COUT20
OPT
7343
C
L4
Q16
OPT
5
Q8
+
OPT
Q7
OPT
4
COUT13
OPT
7343
J8
OPT
15
INTVCCB
INTVCCB
COUT11
OPT
1206
OPT
COUT16
OPT
1206
OPT
4
R53
OPT
1
2
3
9
ITH1
MODE1
EXTVCCB
D3
OPT
5
BG1
19
18
Q14
OPT
R46
INTVCCB
L3
1
2
3
ISENSE1-
20
5
23
SW0
24
EXTVCC
R50
OPT
EXTVCCB
TG0
26
25
FAULT1B
27
LOWDCR
RUN1
21
1
2
3
8
C
D
R45 OPT
22
5
7
INTVCC
C22
OPT
CIN11
+OPT
CAP-SVP-F8
R44
OPT
4
1
2
3
6
RUN0
OPT
4
TG1
C27
OPT
VIN
PHASMD
R48
OPT
4
14
5
BG0
ISENSE0-
13
OPT
ISENSE0+
SYNC
4
Q6
BG3
U2
LTC3874IUFD#PBF
OPTIONAL
BOOST0
12
3
MODE0
ILIM
C23
OPT
2
FAULT0B
28
ITH0
1
C26
OPT
R40
OPT
R43
OPT
SW3
C21
OPT
RUN_SLAVE
4
VIN
Q13
OPT
ITH_SLAVE
FREQ
OPT
Q23
Q5
OPT
1
2
3
3
D
11
2
R42
OPT
10
PGOOD1
R47
R41
OPT
5
R39
OPT
TKSS1
1
2
3
E25
5
FAULT_SLAVE
C29
OPT
COUT17
OPT
1206
R55
OPT
R57
OPT
JUMPERS TO TIE PHASES TOGETHER
B
B
INTVCCA
CHL_SEL
R58
OPT
ITH1
ITH2
R61 OPT
ITH_SLAVE
VOUT1
R62 OPT
VFB2R66
OPT
TKSS1
R65
0
VFB1
TKSS2
RUN
R68 OPT
VOUT2
VOUT_SLAVE
R59 OPT
R60 OPT
1225
1225
R63
OPT
1225
VFB2+
R64
OPT
1225
R67 OPT
RUN_SLAVE
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.
HZ
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
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-A
SHEET 2
1
OF 3
5
4
3
DYNAMIC LOAD CIRCUIT FOR VOUT1
OPTIONAL COUT
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
E16
D
VOUT2
+
COUT27
OPT
7343
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
J9
COUT1,2,6,7: Murata GRM31CR60G227M (220uF, 4V, X5R, 1206)
R70
10k
1%
ISTEP1+
R71 E17 LOAD STEP
0.002
2mV / Amp
1%
2010
ISTEP1E19
E18
Q22
SUM60N02-3m9P
TO-263AB
PULSE GEN2
+
L1,2: Wurth 744301025
(250nH, DCR=0.32mOhms +/- 7%, Isat = 65A typical,
footprint = 11.3mm X 11mm, H = 8.9mm)
VOUT1
COUT3-5,8-10: Panasonic EEFSX0E331ER (330uF, 9mOhms, 2.5V, 7343)
D
CIN1-4: 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
DYNAMIC LOAD CIRCUIT FOR VOUT2
VOUT_SLAVE
+
1
Notes to PCB designer:
VOUT1
VOUT1
+
2
COUT39
OPT
7343
COUT40
OPT
7343
+
+
COUT41
OPT
7343
+
COUT42
OPT
7343
+
COUT43
OPT
7343
+
COUT44
OPT
7343
GND
E20
R72
10k
1%
E22
VOUT2
VOUT2
J10
R73
0.002
1%
2010
ISTEP2+
LOAD STEP
2mV / Amp
E21
E23
ISTEP2-
C
C
OPTIONAL DUAL CHANNEL MOSFETS
VIN
6
2
7
1
8
SW2
BG1
TG2
VIN
R76
34.8k
SW2
4
5
3
6
2
7
1
8
1
3
Q18
BSG0811ND
OPT
JP10
ON
RUN
OFF
RUN
2
RUN
C32
OPT
BG2
SW3
5
3
6
2
7
1
8
CIN19
OPT
1210
SW4
BG3
TG4
9
CIN18
OPT
1210
10
TG3
4
SW3
R74
0
SW4
4
5
3
6
2
7
1
8
B
VIN
Q20
BSG0811ND
OPT
BG4
R79
OPT
0805
RUN
C33
OPT
1206
R80
OPT
U3 LT6703IDC-3
1
R81
OPT
10
CIN17
OPT
1210
9
CIN16
OPT
1210
R82
0
R78
10.0k
B
Q19
BSG0811ND
OPT
RUN_SLAVE
E24
3
5
CIN15
OPT
1210
10
TG1
SW1
4
CIN14
OPT
1210
10
SW1
Q17
BSG0811ND
OPT
9
CIN13
OPT
1210
9
CIN12
OPT
1210
OUT
2
VS
3
4
+INA GND
OPT
C34
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.
HZ
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
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-A
SHEET 3
1
OF 3
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