DC1221B - Schematic

REVISION HISTORY
ECO
REV
__
DATE
PRODUCTION
MOLLY Z.
04-05-10
C1
22uF
6.3V
0805
E1
GND
E2
U1
LT3502EDC
VIN
VIN
4.5V - 40V
APPROVED
L1
15uH
CDRH4D22/HP-150
VOUT
VOUT
3.3V / 500mA
1
DESCRIPTION
1
VIN
SW
8
E3
VOUT
+ C4
10uF
50V
opt.
C3
1uF
50V
0805
2
3
C5
opt.
R1
31.6K
4
BD
EXPOSED
BOOST
PAD
FB
SHDN
GND
GND
DA
GND
C2
0.1uF
16V
7
D1
MBR0540T1
6
5
9
E4
R2
10.0K
VIN
R3
1
JP1
RUN/SS
ON
2
3
OFF
CUSTOMER NOTICE
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN 0402.
ALL CAPACITORS ARE IN 0402.
22K 0603
E5
C6
opt.
0603
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.
MOLLY Z.
2. INSTALL SHUNTS AS SHOWN.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
TECHNOLOGY
JW
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
40V, 500mA, 1.1MHz BUCK REGULATOR IN 2x2 DFN
SIZE
IC NO.
REV.
LT3502EDC
N/A
1
DEMO CIRCUIT 1221B
DATE:
04-05-10
SHEET 1
OF 1
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