DC1087A - Schematic

D
E
CCM
C
DCM
B
BURST
A
JP1
1
2
3
4
MODE
VIN
4
R1
200K
SYNC/MODE
R2
200K
4
R3
10.0K
1%
JP2
3
2
1
C1
0.1uF
16V
R8
200K
R9
(Opt)
PGOOD2
C5
(Opt.)
VIN
RUN2
7
VIN2
14
13
3
23
PGOOD1
25
26
24
FREQ
TRACK/SS1
21
VFB1
20
ITH1
19
PHASE
18
RUN1
17
PGND2
16
PGND1
15
R18
0
VOUT1
C6
470pF
C8
10pF
R20
200K
VIN
VIN
2
U1
LTC3546EUFD
JP6
VOUT1
PHASE
00
180
0
L1
1.5uH
IHLP1616ABER-11
JP5
VOUT1
C19
(Opt.)
C20
(Opt.)
C18
(Opt.)
C16
(Opt.)
E11
E10
C14
22uF
6.3V
E12
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
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.
B
C
VOUT1
2.5V/1A
GND
LINEAR TECHNOLOGY CORPORATION
Customer Notice
1
A
E6
R17
316K
1%
ON
C17
22uF
6.3V
L2
0.47uH
IHLP1616ABER-01
C4
10pF
R21
5.1K
OFF
VOUT2
C15
22uF
6.3V
VCCA
VIN1
SGND
R25
49.9K
1%
R28
0
R14
49.9K
1%
22
exposed pad
solder side
VOUT2
C13
22uF
6.3V
GNDA
27
SYNC/MODE
28
PGOOD2
VCCD
6
12
JP4
ON
GND
5
11
C12
10uF
10V
E8
E9
ITH2
8
OFF
VOUT2
1.2V/3A
4
10
+ C11
22uF
6.3V
VFB2
VIN1D
E7
E5
BMC1
PGND1D
VIN
2
GND
R19
200K
TRACK/SS2
3
1
2
3
VIN
2.5V - 5.5V
C10
0.1uF
16V
2
SW1D
R23
2.2
BMC2
SW1
C9
10pF
1
SW2B
R22
5.1K
9
C7
1000pF
R12
49.9K
1%
E3
R6
10.0K
1%
PGOOD1
R11
(Opt.)
GNDD
R16
100K
1%
R15
0
C2
0.1uF
16V
R26
0
R7
(Opt.)
R27
0
SW2A
R24
49.9K
1%
29
3
VOUT2
R10
200K
R13
143K
1%
E4
C3
47pF
TRACK1
1
2
3
R5
10.0K
1%
R4
3.01K
1%
TRACK/SS1
1
2
3
E2
TRACK1
JP3
VCCA
TRACK/SS2
1
2
3
TRACK2
SS1
SS2
TRACK2
E1
1
www.linear.com
LTC3546EUFD
Title
Dual Synchronous, Configurable, High Switching Frequency Buck Regulator
D
Size
Document Number
Date:
Monday, January 12, 2009
Rev
Demo Circuit 1087A
Sheet
1
E
A
of
1
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