DC1922A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
-
2
DESCRIPTION
PRODUCTION FAB
L1
EPL3015-103
GND
RUN
RUN
5
MPPC
VCC 3
C9
2.2uF
13
14
SW2
16
1
MPPC
VCC
6
U1
LTC3129EUD
OPT
VOUT 12
R1
2M
1%
R3
2.21K
PWM 10
NC 8
B
OFF
JP1
R8
OPT
RUN
C10
10pF
MPPC
E4
MPPC
PWM
NOTE: UNLESS OTHERWISE
SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402
ALL CAPACITORS ARE IN MICROFARADS, 0603.
R9
OPT
VCC PWM
C11
OPT
6.3V
JP3
PGOOD
3
NC
APP ENG.
J.NOON
SCALE = NONE
VSUPPLY
NC
GND
PGOOD
KEY
VBAT
RSVD
EHORBAT
I/O 2
I/O 1
+5V
V+
2
4
6
8
10
12
B
Q1
ZXMN2F30FH
APPROVALS
PCB DES.
PGOOD
SMH-106-02-L-D-05
1
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.
4
1
3
5
7
9
11
BURST MODE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
CAUTION: ONLY
CONNECT IF VOUT IS
CONFIGURED FOR 3.3V
FIXED FREQ
CUSTOMER NOTICE
A
VOUT
J1
2
VCC
C
JP4
R7
OPT
JP2
GND
NC
OFF
E5
R2
619k
1%
VOUT
R6
2M
ON
C4
1uF
25V
PWM
3
RUN
ON
R4
2M
D
VOUT
5.0V / 200mA
VIN > VOUT
PGOOD
NC 9
VIN
R5
2M
C3
22uF
10V
1210
E3
PGOOD
DUST PWR
VIN
01 - 02 - 13
PGOOD 11
D1
VOUT
C7
33pF
FB 7
GND
C
C6
22nF
50V
BST2
4
PGND
E2
C2
1uF
25V
J.NOON
15
OPT
7343
C1
22uF
25V
1210
VIN
GND
+ C8
2
17
2.4V - 15V
SW1
E1
VIN
BST1
VIN
DATE
VOUT
D
C5
22nF
50V
APPROVED
TECHNOLOGY
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
15V, 200mA SYNCHRONOUS BUCK - BOOST DC / DC
CONVERTER WITH 1.3uA QUIESCENT CURRENT
SIZE
IC NO.
REV.
LTC3129EUD
N/A
2
DEMO CIRCUIT 1922A
DATE: 01 - 02 - 13
2
SHEET 1
1
OF
1
A
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