DC1864A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
DESCRIPTION
2
PRODUCTION
APPROVED
DATE
TOM G.
11-29-12
D
D
U1
LTC3621EDCB-2
2
VIN
E1
1
VIN
2.7V - 17V
C1
10uF
+
ON
SW
R1
100k
OPT
BM (Burst Mode)
RUN
3
3
PS (Pulse-Skip)
JP2
CFF
22pF
6
R2
100k
OPT
C2
22uF
GND
4
C
INTVCC
MODE/SYNC
R3
619k
R4
309k
R5
196k
JP3
JP4
JP5
1.2V
1.8V
2.5V
R6
137k
R7
84.5k
R8
OPT
JP6
JP7
JP8
3.3V
5.0V
USER SELECT
GND
7
GND
B
E3
E6
SYNC
1A
C3
22uF
E4
B
VOUT
RUN
C4
1uF
2
MODE/SYNC (Forced Continuous)
E2
2
5
E7
1
INTVCC
VOUT
2.2uH
Rset
619k
FB
C
L1
1
JP1
OFF
3
C1A
8.2uF
25V
VIN
GND
E5
CUSTOMER NOTICE
LINEAR
TOM G.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.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
APPROVALS
PCB DES.
TECHNOLOGY
HZ
APP ENG. TOM G.
TITLE: SCHEMATIC
17V VIN SYNCHRONOUS STEP-DOWN REGULATOR
WITH ULTRA-LOW QUIESCENT CURRENT
SIZE
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
REV.
LTC3621EDCB-2
DEMO CIRCUIT 1864A
2
Friday, November 22, 2013
DATE:
2
SHEET 1
1
OF 1
A
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