DC1956A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
VIN
VIN
2.7V - 12V
GND
E10
JP1
RUN SHDN
1
3
R1
100K
C1
1uF
25V
0805
R2
OPT
D
10
11
JP2
VIN
1
VIN
E1
2MHz
16
3
12
VIN
VIN
R4
100K
CTRL
E3
1
E4
13
LOS
VIN
R7
1M
C
APPROVED
PRODUCTION
JESUS R.
DATE
10-18-13
8
SW
C5
0.22uF
100V
1206
6
VOUT
D
MONIN
R12
634K
EN/UVLO
U1
LT3905EUD
FSEL
C6
OPT
15
FB
R6
OPT
14
J1
0
9
GND
LOS
R16
5
APD
ILIM
APD
Q1
ZXTN25100DFH
LOS_MON
0
BNC
17
GND
LOS_ADJ
R21
OPT
R15
LOS ADJ
E6
R13
15.0K
CTRL
R5
100K
ILIM
E5
DESCRIPTION
2
1MHz
R3
1M
7
VIN
EN
3
10uH
COPPER
BUSSMANN
SD3110-100-R
2
E2
REV
__
L1
ILIM_MON
2
R17
MON
3
1K
PWM
E11
4
C8
OPT
100V
0805
GND
LOS_MON
E14
C3
OPT
E8
C
50V / 2mA
E13
R10
1M
(12.5uA LOS)
LOAD STEP CIRCUIT
ILIM_MON
E7
R9
OPT
C2
OPT
R8
12.4K
(2mA Limit)
MON
MON
B
E9
C4
OPT
B
R11
4.99K
(1mV/uA)
VIN
0.5pF
C9
R14
MON
NOTE: UNLESS OTHERWISE SPECIFIED
R18
OPT
4.99K
R20
OPT
1. ALL RESISTORS ARE 0603.
ALL CAPACITORS ARE 0603.
V+
4
+
VIN
R19
4.99K
U3
GND
NC
GND
NC
CUSTOMER NOTICE
C10
0.1uF
6
C12
1uF
1
5
OUT
2
3
Iset
A
C11
1uF
TIA
E12
U2
LT6210CS6
V-
LT1790BIS6-2.048
FAST MONITOR RESPONSE CIRCUIT
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
APPROVALS
3
TECHNOLOGY
JW
JESUS R. TITLE: SCHEMATIC
SIZE
N/A
SCALE = NONE
DATE:
2
IC NO.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
BOOST DC/DC CONVERTER
WITH APD CURRENT MONITOR
LT3905EUD
DEMO CIRCUIT 1956A
Tuesday, October 22, 2013
SHEET 1
1
REV.
3
OF 1
A
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