DC1948A - Schematic

5
4
3
2
ECO REV
2
-
E1
VIN
-1.5V to -36V
R13
(Opt)
GND
R14
0 Ohm
1
2
11
CIN2
4.7µF
50V
X7R
1206
*
CIN1
10µF
50V
+
E4
PRODUCTION
R1
R1
10.0k
1%
0805
3
SHDN
2
3
USER
SELECT
6
ON
4
1
4
5
OFF
IN
IN
IN
OUT
OUT
ILIM
SET
SHDN
Nov 13, 2013
VOUT
C1
4.7µF
50V
X7R
1206
R2
49.9k
1%
0805
D
7
E3
GND
8
R12
0 Ohm
JP4
E9
VOUT
-600mA
Max
C3
(Opt)
1206
C2
0.1µF
GND
E2
9
10
IMONP
IMONN
DATE
EDWIN LI
U1
LT3090EDD
VIN
D
1
REVISION HISTORY
DESCRIPTION
APPROVED
SHDN
E6
1
IMONP
C
3
VIN
R15
(Opt)
1
IMONP
3
R4
2.00k
1%
4
VIN
IMP
JP1
-1.25V
4
-2.5V
R5
R6
24.9k
1%
-5V
49.9k 1%
7
8
-12V
R8
9
R9
243k 1%
10 -15V
USER
SELECT
R10
301k 1%
12
11
C
R7
6
5
2
2
100k 1%
(Opt)
JP2
E7
IMONN
IMONN
E8
+3V
C4
1µF
10V
B
R11
1.00k
1%
4
5
6
+3V
IMN
B
CDC
CUSTOMER NOTICE
1. ALL RESISTORS 0603.
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
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
2. ALL CAPACITORS 0603.
*
2
3
JP3
NOTE: UNLESS OTHERWISE SPECIFIED.
A
1
R1 = 10k is chosen to activate internal current limit.
If lower current limit is required, modify R1 value.
EDWIN LI
C:\PADS PROJECTS\1948A(LT3090EDD)\SCH\1948A_REV2.DSN
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
TECHNOLOGY
RB
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
TITLE: SCHEMATIC
SIZE
N/A
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035 www.linear.com
Phone: (408)432-1900
Fax: (408)434-0507
-36V, 600mA Negative Linear Regulator
with Programmable Current Limit
IC NO.
REV.
LT3090EDD
2
Demo Circuit 1948A
MODIFY DATE: Nov 13, 2013
2
SHEET
1
1
OF
1
A
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