DC2359A - Schematic

5
4
3
2
1
U1
LTC3624HMSE (1MHz)
E1
D
VIN
2.7V - 17V
3
+ CIN [1]
47uF
20V
C2
22uF
25V
1206
R7
0
RUN
E2
C3
22uF
25V
1206
4
VIN
SW
VIN
SW
L1
3.3uH
2
E7
5
2
Coilcraft XAL4030-332ME
RSET
619k
1%
RUN
3
OFF
R8
OPT
JP1
FB
C7
OPT
FCM / SYNC
[2]
3
MODE/SYNC
R10
OPT
4
PS
[2]
JP2
2A
E9
R2
309k
1%
R3
196k
1%
R4
137k
1%
R5
84.5K
1%
R6
OPT
JP7
5.0V
JP8
USER SELECT
E10
GND
JP3
1.2V
6
JP4
1.8V
JP5
2.5V
JP6
3.3V
C
10
GND
2
PGOOD
GND
1
D
NC
7
12
BM
[2]
CFF
15pF
C6
OPT
1210
VOUT
INTVCC
11
C
C8
2.2uF
10V
0603
R9
OPT
MODE
C5
OPT
1206
VOUT
ADJ
GND
R1
619k
1%
9
INTVCC
C4
47uF
6.3V
1206
8
RUN
INTVCC
R12
0
1
ON
GND
E3
E8
1
E4
SYNC
INTVCC
E5
GND
R11
1Meg
E6
B
PGOOD
B
NOTES:
[1]
CIN IS AN OPTIONAL CAPACITOR. IT IS INSERTED
ON THE DC2359A TO DAMPEN THE (POSSIBLE)
RINGING VOLTAGE DUE TO THE LONG INPUT LEADS.
ON A NORMAL, TYPICAL PCB, WITH SHORT TRACES,
THE CAPACITOR IS NOT NEEDED.
[2]
FOR FCM OPERATION, STUFF R9 AND
R10 WITH 1MEG OHM RESISTOR.
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
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
TECHNOLOGY
`\
Z_
TITLE: SCHEMATIC
5
4
3
IC NO.
N/A
SCALE = NONE
A
MONOLITHIC SYNCHRONOUS BUCK REGULATOR
WITH ULTRA-LOW QUIESCENT CURRENT
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
LTC3624HMSE
DEMO CIRCUIT 2359A
DATE: Wednesday, August 12, 2015
2
SHEET 1
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REV.
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