DC1520A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
-
1
2
APPROVED
DESCRIPTION
PRODUCTION
ADD "C11"
DATE
MOLLY Z
YING C.
01-13-11
02- 08-11
D
D
E1
VIN
4.5V - 36V
60V TRANSIENT
E2
R2
GND
S
12
UVLO
17
EN
BOOST
22
SW
SW
SW
SW
SW
SW
SW
SW
SW
1
2
3
4
23
24
25
26
27
PG
18
(OPT)
C
ENABLE
1
EN
U1
2
DIS
C11
2.2uF
10V
C3
47uF
6.3V
1210
L1
3.3uH
19
R1
0 Ohm
BIAS
E4
C1
22uF
63V
(OPT)
VIN
VIN
VIN
+
C2
10uF
50V
1210
13
14
15
VIN
E3
GND
C4
0.68uF
10V
0603
C
R3
100K
E5
PG
LT3690EUFE
3
JP1
C7
680pF
FB
9
8
RT
7
R5
VC
SYNC
5
45.3K
1%
450kHz
C8
0.47uF
10V
0603
VCCINT
SYNC
R6
102K
1%
S
1
MODE
S
GND
20
C10
(OPT)
28
B
E6
SS
GND
GND
GND
GND
C6
(OPT)
R7
21.5K
1%
R4
316K
1%
C9
(OPT)
11
6
10
16
21
C5
1000pF
VOUT
3.3V @ 4A
2
FIXED FREQ
3
BURST MODE
B
JP2
S
S
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
MOLLY Z
5
4
3
36V / 4A mPOWER SYNCHRONOUS BUCK REGULATOR
N/A
SCALE = NONE
A
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
TITLE: SCHEMATIC
SIZE
C:\PADS PROJECTS\1520A\SCH\1520A_REV2.DSN
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
TECHNOLOGY
RB
1630 McCarthy Blvd.
Milpitas, CA 95035 www.linear.com
Phone: (408)432-1900
Fax: (408)434-0507
DATE:
2
IC NO.
REV.
LT3690EUFE
DEMO CIRCUIT 1520A
Monday, March 28, 2011
2
SHEET
1
1
OF
1
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