DC967B - Schematic

5
4
3
2
1
REVISION HISTORY
IntVcc
MODE
CLKOUT PHASE
3
CCM
BURST
D
o
4
o
3
2
120
1
180
90
PLLIN/MODE
DESCRIPTION
APPROVED
DATE
JOHAN S.
01-11-10
PRODUCTION
R24
200K
D
1
JP3
E3
VOUT
1
2
o
JP2
REV
__
PGOOD
R19
100K
IntVcc
4
DCM
ECO
E2
3
2
C6
3
SS
R3
68.1K
JP5
11
BG
14
R14
0
8
0
R2
215K
R10
optional
C9
39pF
C23
4.7uF
10V
B
VOUT
R11
(optional)
0805
Q2
Si4840DY
4
D2
CMDSH-4E
C5
1nF
R1
12mOhm 1% 0.5W
L1
3.2uH
C4
0.1uF
C
C10
(optional)
VOUT
E8
IntVcc
E6
GND
12
C24
opt
R9
TRACK
4V to 36V
E7
C22
22uF/50V
E10
5
6
7
8
PGOOD
Vin
18
20
Phasmd
19
PLLIN/MODE
15
LTC3835EFE
6
1
VFB
U1
1200pF
2
TRACK
C7
150pF
SGND
TRACK/SS
Ith
5
C13
10uF/50V
4
Sense+
9.53K 1%
C8
0.1uF
Boost
3
13
17
R4
TRACK/SS
TG
Q1
Si4840DY
21
0
4
Vin
C12
0.1uF/50V
SW
Sense-
R13
Plllpf
16
JP1
2
IntVcc
4
CLKOUT
EXTVCC
250kHz
1
9
3
R20
10K
10
2
550kHz
1000pF
C16
100pF
RUN
IntVcc
1
400kHz
R6
10K
PGND
FREQUENCY
C
E11
C15
SGND
JP4
VIN
R5
0
IntVcc
5
6
7
8
CLKOUT
1
2
3
1
7
OFF
D1
(OPT)
C14
(optional)
C2
4.7uF
16V
GND
R21
0
C3
4.7uF
10V
[email protected]
C1
150uF/10V
1
2
3
ON
E9
C17
1uF
B
R17
0
R18
0
R23
SGND
(optional)
E4
EXTVCC
EXTVCC
E5
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.
A
NOTES: UNLESS OTHERWISE SPECIFIED,
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
A.K.
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
JOHAN S.
SINGLE 5A HIGH FREQUENCY STEP-DOWN DC/DC CONVERTER
SIZE
N/A
SCALE = NONE
DATE:
2
IC NO.
LTC3835EFE
REV.
1
DEMO CIRCUIT 967B
Friday, January 08, 2010
SHEET 1
1
OF 1
A
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