DC1700A - Schematic

5
4
3
2
1
REVISION HISTORY
D
58
56
55
54
53
2
3
4
5
6
7
8
9
57
16
17
19
28
29
PVIN
PVIN
PVIN
PVIN
PVIN
SW
SW
SW
SW
SW
SW
SW
SW
NC
PVIN
PVIN
PVIN
PVIN
PVIN
PVIN
PVIN
PVIN
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
SGND
SGND
SGND
SGND
SGND
SGND
ECO
59
51
50
49
48
47
46
45
52
R4
10
INTVCC
U1A
LTC3613EWKH
S+
14
1000pF
C2 15
S-
18
PGOOD
BOOST
SNS+
11
10
SW 35
SW
36
PGND
SNS-
R10
90.9K
R11
60.4K
R12
0
22
C7
0.01uF
C6
C9
47pF
R15
21K
270pF
OFF
21
INTVCC
24
R16
OPT
25
R17
0
INTVCC
INTVCC
VOSNS+
PVIN
TRACK/SS
ITH
SVIN
MODE/PLLIN
VRNG
RT
R18
115K
SW
S+
R7
OPT
0.47uH
R9
OPT
FP1109-R47
C5
4.7uF
16V
0805
2010
COUT1
100uF
6.3V
1206
COUT2
100uF
6.3V
1206
C
33
VIN
PLLIN
VIN+
E3
1
32
31
EXTVCC
30
EXTVCC 27
C10
NC
26 1uF
RUN
C8
0.1uF
50V
CIN1
10uF
25V
1210
R13
2.2
CIN2
10uF
25V
1210
CIN3
1210
OPT
VIN
E4
+CIN4
4.5V - 24V
82uF
25V
SANYO
25SVPD82M
GND
E5
VIN-
E6
LOAD STEP CIRCUIT
VOUT
COUT6
OPT
1206
COUT5
OPT
1206
INTVCC
J3
C3
4.7uF
16V
0805
B
1
Q5
R23
10k
PULSE
GEN
E7
SUD50N03-12P
3
JP2
J2
VOUT
B
MODE
1
2
3
DCM
1.5V / 15A
GND
S-
INTVCC
R21
OPT
CCM
330uF
2.5V
7343
RS1
0.0015
FSW = 350kHz
R19
OPT
1
2
3
23
VOSNS-
L1
330uF
2.5V
7343
J1
+COUT4
12
C4
OPT
34
R3
OPT
C1
0.1uF
16V
INTVCC
VOUT
SGND
20
D1
CMDSH-3 INTVCC
1
2
R2
0
C
JP1
RUN
R5
10
+COUT3
13
ON
D
VO_SNS-
VOUT
R6 100
VIN
VO_SNS+
VOUT
R1
100K
R14
OPT
DATE
CHARLIE Z. 08-23-11
E2
44
43
42
41
40
39
38
37
36
E11
E12
APPROVED
PRODUCTION
E1
R8 100
TRACK
DESCRIPTION
3
SW
U1B
LTC3613EWKH
PGOOD
REV
__
2
VIN
R20
10K
GND
E8
R22
0.01
2010
LOAD STEP
CIRCUIT
5% DUTY CYCLE MAX
J4
E10
EXTVCC
EXTVCC
E9
NOTES: UNLESS OTHERWISE SPECIFIED
A
1. WHEN DCR SENSING IS IMPLEMENTED, SHORT RS1
AND R9; DO NOT POPULATE R6 AND R8.
2. ALL RESISTORS ARE IN 0603
ALL CAPACITORS ARE IN 0603
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
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.
5
4
3
APPROVALS
PCB DES.
TECHNOLOGY
AK
APP ENG. CHARLIE Z.
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
FAST, HIGH EFFICIENCY STEP-DOWN REGULATOR
SIZE
N/A
SCALE = NONE
2
DATE:
IC NO.
LTC3613EWKH
REV.
3
DEMO CIRCUIT 1700A
Tuesday, August 23, 2011
SHEET 1
1
OF 1
A
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