DC970A - Schematic

A
B
C
D
E
* VERSION TABLE
VLDO
ENABLE
ASSEMBLY TYPE
1
ON
4
2
VOUT1
SELECT
3
OFF
1
3
4
R9
124K 1%
R10
73.2K 1%
DC970A-A
LTC3541EDD
DC970A-B
LTC3541EDD-1
JP8
2
3
JP6
U1
VIN
3V-5.5V
Vin
E1
CIN
10uF
6.3V
1
CIN1
0.1uF
6.3V
GND E2
* See table
VIN
SW
2
ENBUCK
ENVLDO
9
3
BUCKFB
MODE
8
4
LFB
GND
7
5
LVOUT
LVIN
6
BUCK
ENABLE
L1
1.5uH
10
C2
22pF
25V
R8
1%
Vout1
VOUT1
E5
C1
22uF
6.3V
GND
1
LVIN_EXT
3
JP9
2
LVIN_EXT
R5
576K
3
OFF
VOUT1
2
1
ON
3
Io1max=500mA - Io2
E6
CLVIN
1uF
6.3V
11
(optional)
LTC3541EDD
PGND
BURST
3
2
2.5V
MODE
PULSE
SKIP
1
1.8V
JP7
U1
E7
JP5
JP1
0.8V
2
JP2
1.2V
JP3
1.5V
JP4
1.8V
Vout2
E3
C3
22pF
R1
576K
1%
R2
287K
1%
R3
210K
1%
R4
165K
1%
CUSTOMER NOTICE
A
B
COUT
2.2uF
6.3V
Io2=300mA
GND
E4
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
CIRUIT 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.
1
COUT1
2.2uF
6.3V
(Opt)
2
VOUT2
C
CONTRACT NO.
APPROVALS
DRAWN
A. Karpova
DATE
10/28/05
CHECKED
TECHNOLOGY
TITLE
LTC3541EDD/LTC3541EDD-1
1
High Efficiency, Low Noise, Step-Down DC/DC Regulator
APPROVED
ENGINEER
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
George Yu
DESIGNER
Friday, April 20, 2007
10/28/05
SIZE CAGE CODE
FILENAME:
SCALE:
D
DWG NO
REV
DC970A
SHEET
1
E
3
OF
1
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