DC2243A - Schematic

5
4
3
2
1
VIN1
D
VIN1
7V TO 40V
TRANSIENT TO 60V
E1
D
+
E3
GND
C1
10uF
63V
E8
1
EN
15
E7
3
2
VOUT1
3
DIS
JP1
2
IN1
BOOST
EN
SW
U1
LT3668EMSE
R5
150k
14
R8
VOUT1
R19
C
EN2
DIS
R20
200k
200k
1
4
174k
1%
DA
1
PG
16
12
R10
3
1.50k
1%
JP3
VOUT2
EN3/ILIM3
ADJ2
2
R12
EN
GND
ADJ3
OUT3
IN3/BD
17
7
6
5
1.50k
1%
JP4
ADJ3
C14
VOUT1_5V
B
47nF
R17
C7
10µF
10V
1206
9
C17
(Opt)
0603
VOUT3
R13
E11
GND
0 Ohm
R18
E15
E2
IN3/BD
C10
1µF
(Opt)
VOUT3
C19
1206
(OPT)
MMZ1608S601AT
0603
(OPT)
VIN1_EMI
C12
OPT
E14
VIN1
GND
4.7uH
C20 CDRH2D18/LDNP‐4R7NC
Sumida
1206
(OPT)
(OPT)
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.
A
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0603
ALL CAPACITORS ARE 0603
TECHNOLOGY
4
3
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
40V STEP‐DOWN REGULATOR WITH DUAL TRACKING LDOs
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
E13
VOUT3
5V / 200mA
C11
10µF
10V
1206
EMI Filter
L2
B
+ C16
C18
(Opt)
0603
FB1
VOUT2
5V / 200mA
C8
OPT
0 Ohm
0 Ohm
E18
E10
10
1
C
(Opt)
0 Ohm
E17
47nF
3
IN2
+ C15
ADJ2
EN3
E6
GND
EN2/ILIM2
OUT2
13
*
C6
0.1uF
R6
11
E12
DIS
R1
243k
1%
VOUT1_5V
VOUT1
6V / C5
22µF
25V
1210
E16
C9
1µF
EN3 / ILIM3
C13
C4
22pF
E4
931k
1%
R9
294k
1%
RT
IN2
VOUT1
R7
8
E9
2
EN
FB1
fs=600KHz
EN2 / ILIM2
L1
27µH
CDRH5D28RHPNP‐270M
D1
DFLS160‐7
E5
PG
* SEE DEMO MANUAL FOR CURRENT CAPABILITY
0.22µF
EN
VIN1
ENABLE
C3
C2
2.2µF
100V
1206
GND
N/A
DATE:
IC NO.
REV.
LT3668EMSE
DC2243A
3
SHEET
Wednesday, January 21, 2015
1
1
OF
1
A
Similar pages