DC922A - Schematic

A
B
C
D
E
Vin
VIN
C1
10uF
10V
C2
10uF
10V
3
4
JP1
Mode
Pulse Skipping
C7
1uF
10V
R1
10
C3
22uF
10V
R2
100K
C4
22uF
10V
(Opt.)
2.75V - 8V
C5
10uF
10V
C6
10uF
10V
Gnd
2
1
2
3
E12
1
3
2
1
Continuous
Q2
Si9433BDY
Q3
Si4346DY
SENSE2+
11
5
6
7
8
SENSE1+
12
4
21
PGND2
3
R3
118K
1%
E4
SYNC/FCB
E6
SW1
19
BG1
RUN/SS
15
SW2
10
BG2
13
PGND
16
Q6
FDC638P
L2
0.68uH
IHLP-2525CZ-01-0.68uH
C11
47uF
6.3V
C12
47uF
6.3V
C13
10uF
6.3V
E3
SYNC/FCB
14
RUN/SS
PGOOD
9
6
TRACK
PLLLPF
3
23
IPRG1
IPRG2
2
24
VFB1
VFB2
7
PGOOD
ITH2
8
E7
ITH1
3
1.8V @ 6A
18
U1
LTC3736EUF-2
C14
(Opt.)
TG2
1
2
5
6
22
1
E8
Vout2
1
2
3
Gnd
TG1
bottom exposed pad
C10
47uF
6.3V
17
SGND
C9
47uF
6.3V
Q5
FDC638P
Gnd
E5
PLLLPF
4
6
5
2
1
2.5V @ 6A
C8
10uF
6.3V
Q4
Si4346DY
4
3
2
1
L1
0.68uH
IHLP-2525CZ-01-0.68uH
E2
2
PGND1
3
Vout1
3
4
20
4
8
7
6
5
5
6
7
8
PGND
25
4
8
7
6
5
VIN
5
4
Q1
Si9433BDY
4
E1
C15
0.01uF
E9
IPRG1
2
IPRG2
E10
R5
187K
1%
R4
10K
VIN
C20
120pF
SGnd
C16
1200pF
C22
( Opt. )
R8
59K
1%
R9
59K
1%
C17
(Opt.)
C18
(Opt.)
R10
5.1K
R6
118K
1%
C19
1500pF
R11
10K
R12
59K
1%
R13
10K
E11
VIN
R7
10K
C21
( Opt. )
E13
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
Customer Notice
1
NOTES:
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.
UNLESS OTHERWISE SPECIFIED
A
B
C
D
LINEAR TECHNOLOGY CORPORATION
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
Title
1
2-Phase Dual Synchronous Step-Down Converter with Output Tracking
Size
Document Number
Date:
Thursday, September 22, 2005
Demo Circuit 922A
LTC3736EUF-2
1
Sheet
E
of
1
Rev
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