DC2235A - Schematic

REVISION HISTORY
ECO
C2
10uF
25V
1206
(1210)
C1
10uF
25V
1206
(1210)
C4
1uF
25V
0805
2
1
VOUT+
CBST+
CBST-
LDO +
SW1
BYP+
VOUT+
VIN_N
VIN_P
11
C12
10uF
50V
1210
VIN_P
WURTH
450301014042
EN+
ON
OFF
1
2
3
R1
1.0M
5%
13
E3
VIN_P
C5
OPT
25V
0603
JP1
EN+
R5
4.7k
5%
EN ON
OFF
1
2
3
EN -
R7
4
4.7k
5%
MODE
BURST
CONST
FREQ JP3
E5
17
15
C8
0.1uF
16V
VIN_N
( 2 · VIN_P ) *
E8
GND
JP5
** LDO+
CINV-
CINV+
R2
1.0M
EN+
ADJ+
C6
10uF
50V
1210
R3
604k
R4
165k
R14
MODE
C15
10pF
50V
E9
VIN_P
E10
R8
1.0M
14
C9
OPT
25V
0603
4.7k
5%
LDO -
E6
GND
FREQ
1
50kHz
2
3
4
200kHz
500kHz
JP4
R15
909k
R9
604k
R10
165k
C16
10pF
50V
LDO 50mA
E12
GND
MODE
BYP-
12
E11
6
R13
1.0M
5%
1
2
3
GND
R12
52.3k
ENADJ-
LDO +
50mA
16
R11
52.3k
C7
OPT
25V
0603
DATE
VOUT+
C3
10uF
50V
1210
R6
1.0M
5%
JP2
E4
9
C13
1uF
50V
1206 10
APPROVED
M. MERCHANT 05 - 28 - 15
18
RT
GND
19
VOUT-
5
C11
0.1uF
16V
C10
10uF
50V
1210
-24V
-15V
-5V
E2
PRODUCTION FAB
E7
VIN_P
24V
15V
5V
3
VIN_P
GND
DESCRIPTION
3
U1
LTC3265
E1
4.5V - 16V
REV
JP6
** LDO-
7
E13
8
VOUT( - VIN_N ) *
C14
10uF
50V
1210
E14
GND
R16
200k
* SEE DEMO MANUAL FOR VOUT ± CURRENT CAPABILITY
** WARNING: IF LDO± OUTPUT JUMPER (JP5, JP6) IS REMOVED
WHILE CONVERTER IS ENABLED, THE LDO OUPUT WILL
INCREASE TO THE RESPECTIVE VOUT INPUT.
CUSTOMER NOTICE
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0402, 1%, 1/16W
ALL CAPACITORS ARE 0402, 10%
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
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
TECHNOLOGY
NC
MARTY M.
2. INSTALL SHUNTS AS SHOWN.
TITLE: SCHEMATIC
LOW NOISE DUAL SUPPLY WITH
BOOST AND INVERTING CHARGE PUMPS
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
N/A
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
DATE:
IC NO.
REV.
LTC3265EDHC
DEMO CIRCUIT 2235A
05 - 28 - 15
3
SHEET
1
OF
1
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