DC965A - Schematic

A
C
D
E
R3
0
1
4
1
3
R4
100K
4
ON
OFF
DCM
CCM
BURST
400KHz
550KHz
250KHz
4
C1
0.1uF
JP4
VOUT
1
PLLIN/MODE
2
1
2
R2
(Opt.)
JP3
MODE
3
R1
0
3
3
E2
JP2
PLLPF
2
TRACK
JP1
TRACK/SS
TRACK
SS
4
2
NOTES:
B
UNLESS OTHERWISE SPECIFIED
E1
R5
10K
R7
9.53K
C4
1200pF
U1
LTC3835EGN-1
1
Plllpf
Pllin/Mode
16
2
Ith
Sense+
15
3
Track/SS
Sense-
14
4
VFB
RUN
13
C5
150pF
3
R10
68.1K
1%
R11
215K
1%
C9
39pF
SGND
Boost
12
SGND
6
PGND
TG
11
E5
7
BG
SW
10
VIN
9
C6
1000pF
VIN
4.5V-36V *
R12
0
Q1
Si4840DY
4
C10
0.1uF
1
D2
CMDSH-4E
2
C14
+ 4.7uF
16V
TAJ
R15
0
2
C8
+ 22uF
50V
Elec.
E3
3
GND
D1
(Opt.)
4
VOUT
R13
.012
0.5W
R14
(Opt.)
0805
[email protected]
C11
+ 150uF
10V
TPD
C13
(Opt.)
C17
4.7uF
10V
X5R
E6
GND
2
C12
0.1uF
50V
1
2
3
IntVcc
C16
3.3uF
50V
X7R
L1
3.2uH
CDEP105-3R2MC
1
8
C7
3.3uF
50V
X7R
E4
5
6
7
8
5
R6
0
R8
0
R9
0
5
6
7
8
C3
100pF
1
2
3
C2
1000pF
E7
Q2
Si4840DY
2
C15
1uF
AGND
DGND
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
Customer Notice
1
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.
* Vin Can Drop As Low As 4V
Without Affecting Output
Voltage
A
B
C
D
LINEAR TECHNOLOGY CORPORATION
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
Title
1
Single 5A High Frequency Step-Down DC/DC Converter
Size
Document Number
Date:
Thursday, June 15, 2006
Demo Circuit 965A
LTC3835EGN-1
1
Sheet
E
of
1
Rev
A
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