DC1489A - Schematic

1
2
* FOR DEMO BOARD USE ONLY
R2
200K
ON
2
3
1000K
VOUT2
COUT1
(OPT)
L2 1.5uH
COUT2
4.7uF
6.3V
COUT3
2200uF
6.3V
10 Vfb2
E9
3
VOUT2
SW1 5
C1
(OPT)
R5
COUT7 1000K
1%
(OPT)
COUT4
2200uF
6.3V
7 SW2
R7
215K
1%
DYNAMIC LOAD CIRCUIT
Rlim
E7
Q1
SUD50N03-10CP-E3
R10 10K
1
2
R11 51
R12
0.01
R13
(OPT)
A
1000K
RUN1
E4
PGOOD1
E6
L1
3.3uH
E8
C2
10pF
R6
1000K
1%
Vfb1 1
COUT6
(OPT)
COUT5
4.7uF
6.3V
R8
221K
1%
R9
110K
1%
IOSTEP CLK
E11
R4
PGOOD1 4
3
GND
8 PGOOD2
E5
ON
Run1 2
11 GND
VOUT2
3.4V / 2A
Pulsed
Load
E3
R1
200K
OFF
9 Run2
VOUT1
3.3V / 400mA
E10
GND
C3
2200pF
J1
10mV / A
1
**
2
3
4
5
RUN2
PGOOD2
JP1
RUN1
2
U1* *
OFF
R3
A
JP2
RUN2
1
E2
3
CIN2
10uF
6.3V
1
GND
CIN1*
68uF
6.3V
Vin 6
VIN
E1
4.5V - 5.5V
Up to 500mA
E12
GND
ASSY
U1
-A
LTC3619EDD
-B
LTC3619BEDD
B
B
CUSTOMER NOTICE
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
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.
1
CONTRACT NO.
APPROVALS
DRAWN
HELEN
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
DATE
7/13/09
CHECKED
TECHNOLOGY
LTC3619EDD / LTC3619BEDD
SYNCHRONOUS BUCK DUAL REGULATOR WITH ADJUSTABLE
INPUT CURRENT LIMIT FOR PULSED LOADS
TITLE
APPROVED
ENGINEER Johan S.
7/13/09
DESIGNER
SIZE
CAGE CODE
DWG NO
REV
2
DC1489A - A / B
Tuesday, September 08, 2009
SCALE:
FILENAME:
2
SHEET
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OF
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