DC1728A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
_
1
DESCRIPTION
PRODUCTION
APPROVED
DATE
EDWIN L.
04-20-11
D
D
C
JP1
3
USER
SELECT
2
1 ON
4 OFF
3
R9
100k
IN
OUT
SHDN
4
E4
IN
SHDN
-1.22V
-2.5V
-5.0V
-12.0V
-15.0V
USER
SELECT
RSD
0
7
6
ADJ
COUT
10uF
25V
1206
C2
OPT
7343
E3
VOUT
-1.5A MAX
GND
2
4
6
8
10
12
SUNCON
50CE10BSS
R8
OPT
E1
VOUT
JP2
HD2X6-079
C
1
3
5
7
9
11
CIN
10uF
50V
1210
8
OUT
GND
10uF
50V
GND
*C1
2
IN
5
1
+
E2
VIN
VIN
-1.9V TO -30V
E5
GND
+
9
U1
LT3015EDD
R2
0
R3
3.65k
R4
11.0k
R5
30.9k
R6
39.2k
R7
OPT
R1
3.48k
B
B
*
CAPACITOR C1 IS AN OPTIONAL PART. IT WAS INSERTED ON THE DC1728A TO
DAMPEN THE (POSSIBLE) RINGING VOLTAGE DUE TO THE USE OF LONG INPUT
LEADS. ON A NORMAL, TYPICAL PCB, WITH SHORT TRACES, THE CAPACITOR
IS NOT NEEDED. SEE APPLICATION NOTE AN88 FOR MORE DETAILS.
CUSTOMER NOTICE
NOTES: UNLESS OTHERWISE SPECIFIED
A
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS.
2. INSTALL SHUNTS AS SHOWN.
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
TECHNOLOGY
KT
EDWIN L.
TITLE: SCHEMATIC
A
1.5A, LOW NOISE, NEGATIVE REGULATOR
WITH PRECISION CURRENT LIMIT
SIZE
IC NO.
DATE:
REV.
LT3015EDD
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
1
DEMO CIRCUIT 1728A
Wednesday, April 20, 2011
SHEET 1
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OF 1
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