DC803A - Schematic

A
B
C
D
E
Vin
VIN
4
3
C19
10uF
10V
Disable
JP1
Spread Spectrum
C3
1uF
10V
R1
10
C1
22uF
10V
R2
1M
2.75V - 8V
C2
22uF
10V
(Opt.)
C20
10uF
10V
Gnd
2
Q2B
Si7540DP
Q2A
Si7540DP
D1
B320A
(Opt.)
4
3
Q5
Si3460DV
(Opt.)
RUN/SS
C15
0.01uF
R12
10K
TG2
15
22
SW1
SW2
10
19
BG1
BG2
13
PGND
16
18
SSDIS
14
RUN/SS
6
PGOOD
9
TRACK
FREQ
3
23
IPRG1
IPRG2
2
24
VFB1
VFB2
7
ITH2
8
ITH1
1
1.8V ( 5A at 5Vin )
D2
B320A
(Opt.)
3
C5
47uF
6.3V
C8
10uF
6.3V
C9
+ 150uF
4V
(Opt.)
C11
470pF
C17
(Opt.)
R6
5.9K
1%
R7
59K
1%
C12
100pF
R8
15K
Gnd
E5
PGOOD
E7
C21
220pF
C13
100pF
3
E3
Q6
Si3460DV
(Opt.)
FREQ
E9
C10
2200pF
R4
187K
1%
C16
(Opt.)
SGnd
Vout2
L2
1.5uH
IHLP-2525CZ-01
1
2
5
6
TG1
U1
LTC3736EUF-1
R3
11.8K
1%
VIN
Q4
Si3447BDV
(Opt.)
1
2
5
6
17
IPRG1
E10
2
3
1
2
11
4
C4
47uF
6.3V
E4
E8
SENSE2+
3
6
5
2
1
Gnd
C7
10uF
6.3V
12
4
Q3
Si3447BDV
(Opt.)
6
5
2
1
C6
+ 150uF
4V
(Opt.)
SENSE1+
SGND
L1
1.5uH
IHLP-2525CZ-01
2.5V ( 5A at 5Vin )
E2
21
PGND2
4
1
Vout1
PGND1
4
2
20
7
8
8
7
5
6
PGND
25
4
6
5
VIN
5
4
Q1A
Si7540DP
3
E12
3
1
3
Enable
Q1B
Si7540DP
4
E1
R5
118K
1%
C14
470pF
R9
15K
R10
59K
1%
2
IPRG2
E11
R13
10K
VIN
C18
(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
LTC3736EUF-1 2-Phase Dual Synchronous Step-Down Converter
with Spread Spectrum and Output Tracking
Size
Document Number
Date:
Thursday, September 30, 2004
DEMO 803A
Rev
LTC3736EUF-1
1
Sheet
E
of
1
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