DC1526A - Schematic

5
4
3
2
1
REVISION HISTORY
L1
10uH
ECO
REV
1
2
DESCRIPTION
APPROVED
DATE
M. ZHU
11-05-09
PRODUCTION
SUMIDA
CDR7D43MN-100
D
D
U1
LT3991EMSE
0603
3
E1
2
4
+
E2
C
1
C2
22uF,100V
C3
2.2uF,100V
1210
SANYO
100CE22BS
GND
JP1
ON
OFF
R6
OPT
0603
1
2
3
5
BD
SYNC
BOOST
PG
SW
RT
VIN
SS
EN
FB
10
9
8
R1
7
118k
(400kHz)
6
R2
562k
C5
10pF
11
VIN
4.5V - 55V
C1
0.47uF,16V
GND
D1
DFLS260
2
1
R3
1M
E5
R4
200K
R7
OPT
0603
C4
47uF,10V
E6
1210
GND
E8
E7
EN
PGOOD
E4
E3
EXTSS
SYNC
R5
100k
0603
B
1
2
3
JP2
C6
OPT
0603
CUSTOMER NOTICE
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
A
C
VOUT
[email protected]
2. INSTALL SHUNTS AS SHOWN.
CONTRACT NO.
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A APPROVALS
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. K. TRAN
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
ENG.
M. ZHU
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.
5
4
3
TECHNOLOGY
B
SYNC
RT FREQ
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
A
55V, 1.2A, MICROPOWER BUCK REGULATOR
SIZE
IC NO.
A
DATE:
REV
LT3991EMSE
2
DEMO CIRCUIT 1526A
Thursday, November 05, 2009
2
SHEET
1
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