DC1428A - Schematic

A
B
C
D
E
REVISION HISTORY
ECO
REV
__
2
DESCRIPTION
APPROVED
DATE
PRODUCTION
JESUS R.
02-23-11
4
4
C1
0.1uF
VIN
JP2
LDO
2
SW
6
5
7
11
VCC2
EN2
OUT2
R6
100K
FB2
C4
10uF
6.3V
0805
C13
OPT
0402
R2
31.6K
1%
4
2
VOUT1
3.3V / 300mA
C11
0.1uF
10V
E3
GND
R3
8
10K
2.5V
3
9
R4
10K
3.3V
NPG
FB
GND
OFF
EN/UVLO
R1
10K
1
2
3
ON
3
E2
D1
PD3S140
DA
13
OFF
1
BOOST
1
2
3
ON
VIN
JP1
3.3V
10V
C3
1uF
50V
1206
R8
OPT
GND
E4
C2
10uF
63V
3
GND
+
NPG
TRANSIENT TO 55V
3.3V
1
E1
12
VIN
5V - 36V
L1
10uH
NRH3012T100MN
10
U1
LT3645EMSE
E5
R5
21.5K
1%
C5
2.2uF
6.3V
VOUT2
2.5V / 200mA
C12
0.1uF
10V
R7
10K
1%
E6
GND
E7
2
2
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0402.
ALL CAPACITORS ARE 0603.
2. INSTALL SHUNTS AS SHOWN.
CUSTOMER NOTICE
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.
1
TECHNOLOGY
JW
JESUS R.
TITLE: SCHEMATIC
A
B
C
IC NO.
REV.
LT3645EMSE
N/A
SCALE = NONE
1
STEP-DOWN REGULATOR WITH LDO
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
2
DEMO CIRCUIT 1428A
DATE:
02-23-11
D
SHEET 1
E
OF 1
Similar pages