DC901A - Schematic

5
4
D
3
2
L1
2.2uH
D1
D
D2
SD12-2R2
Cooper Bussmann
PMEG2010EA
(Opt)
D3
(Opt)
1
PMEG2010EA
(Opt)
U1
LTC3444EDD
E3
VIN
3.1V-5V
C
GND
E5
C4
+
47uF
10V
C5
4.7uF
6.3V
2
SW1
SW2
4
6
VIN
VOUT
5
1
SHDN
FB
8
GND
VC
7
3
GND
9
R1
(Opt)
C3
(Opt)
C2
4.7uF
6.3V
10%
R2
340K
1%
R3
205K
1%
C6
(Opt)
C7
R5
TBD
C1
1uF
6.3V
E1
VOUT
[email protected]
E2
GND
E4
VCONTROL
C
R4
267K
1%
TBD
R6
0 Ohm
JP1
VOUT
ON
1
2
OFF
3
B
R7
100K
B
APPROVALS
This circuit is proprietary to Linear Technology and supplied
for use with Linear Technology parts.
Customer Notice: Linear Technology has made a best effort to
design a circuit that meets customer-supplied specifications;
however, it remains the customers 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
Applications Engineering for assistance.
A
5
4
DRAWN: Rudy Bautista
ENGINEER: David Canny
APPROVED:
Size
CHECKED:
DCxxxA_00.PCB
3
1630 McCARTHY BLVD
www.linear.com
MILPITAS, CA. 95035
LTC Confidential (408)432-1900
(408)434-0507 (FAX) For Customer Use Only
Title
Micropower Synchronous Buck-Boost Converter
for CDMA and HSDPA
xxxA_x.DSN
Document Number
Date:
Rev
1
Sheet
2
1
1
of
1
A
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