Linear Technology LTC3129, Demo Manual, Page: 7 / 8

7
dc1922af
DEMO MANUAL DC1922A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
schematic Diagram
5 5
4 4
3 3
2 2
1 1
D
D
C
C
B
B
A
A
1%
ON
OFF
RUN
MPPC
ON
OFF
PWM
BURST MODE
FIXED FREQ
1%
2.4V - 15V
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402 ALL CAPACITORS ARE IN MICROFARADS, 0603.
CAUTION: ONLY CONNECT IF VOUT IS CONFIGURED FOR 3.3V
VIN > VOUT
NC
DUST PWR
VOUT
VCC
VIN
VIN
VIN
VCC
VOUT
PWM
VCC
MPPC
MPPC
PWM
RUN
RUN
VOUT
PGOOD
PGOOD
PGOOD
VOUT
SIZE DATE:
.V
ER
.O
N
CI
SHEE
T
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507 Milpitas, CA 95035 Phone: (408)432-1900 1630 McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPEC
IFICATIONS;
HOWEVER
, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VER
IFY PROPER AND RELIABLE OPER
ATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PER
FORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEER
ING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 1922A
1
1
CONVERTER WITH 1.3uA QUIESCENT CURRENT
N/A
LTC3129EUD
NC
J.NOON
01 - 02 - 13
15V, 200mA, SYNCHRONOUS BUCK - BOOST DC / DC
SIZE DATE:
.V
ER
.O
N
CI
SHEE
T
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507 Milpitas, CA 95035 Phone: (408)432-1900 1630 McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPEC
IFICATIONS;
HOWEVER
, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VER
IFY PROPER AND RELIABLE OPER
ATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PER
FORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEER
ING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 1922A
1
1
CONVERTER WITH 1.3uA QUIESCENT CURRENT
N/A
LTC3129EUD
NC
J.NOON
01 - 02 - 13
15V, 200mA, SYNCHRONOUS BUCK - BOOST DC / DC
SIZE DATE:
.V
ER
.O
N
CI
SHEE
T
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507 Milpitas, CA 95035 Phone: (408)432-1900 1630 McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPEC
IFICATIONS;
HOWEVER
, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VER
IFY PROPER AND RELIABLE OPER
ATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PER
FORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEER
ING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
DEMO CIRCUIT 1922A
1
1
CONVERTER WITH 1.3uA QUIESCENT CURRENT
N/A
LTC3129EUD
NC
J.NOON
01 - 02 - 13
15V, 200mA, SYNCHRONOUS BUCK - BOOST DC / DC
REVISION HISTORY
DESCRIPTIO
N
DATE
APPROVED
EC
O
REV
J.NOON
PRODUCTION FAB
-
2
01 - 02 - 13
REVISION HISTORY
DESCRIPTIO
N
DATE
APPROVED
EC
O
REV
J.NOON
PRODUCTION FAB
-
2
01 - 02 - 13
REVISION HISTORY
DESCRIPTIO
N
DATE
APPROVED
EC
O
REV
J.NOON
PRODUCTION FAB
-
2
01 - 02 - 13
JP2JP2
C2 1uF 25V C2 1uF 25V
E5
PGOOD
E5
PGOOD
R2 619k R2 619k
JP3JP3
E3
VOUT
5.0V / 200mA
E3
VOUT
5.0V / 200mA
C3 22uF 10V 1210 C3 22uF 10V 1210
U1 LTC3129EUD U1 LTC3129EUD
GND
6
VIN
2
SW1
16
BST2
13
FB
7
RUN
4
VCC
3
PWM
10
PGND
15
GND
17
MPPC
5
PGOOD
11
SW2
14
BST1
1
VOUT
12
NC
8
NC
9
R7 OPT R7 OPT
C4 1uF 25V C4 1uF 25V
C11 OPT 6.3V C11 OPT 6.3V
C5 22nF 50V C5 22nF 50V
R8
OPT
R8
OPT
E4
GND
E4
GND
R9 OPT R9 OPT
R3 2.21K R3 2.21K
C6 22nF 50V C6 22nF 50V
Q1 ZXMN2F30FH Q1 ZXMN2F30FH
3
1
2
D1
OPT
D1
OPT
E1
VIN
E1
VIN
L1
EPL3015-103
L1
EPL3015-103
R6 2M R6 2M
JP4JP4
C7 33pF C7 33pF
C1 22uF 25V 1210 C1 22uF 25V 1210
R4 2M R4 2M
+
C8 OPT 7343
+
C8 OPT 7343
C10 10pF C10 10pF
C9
2.2uF
C9
2.2uF
J1
SMH-106-02-L-D-05
J1
SMH-106-02-L-D-05
VSUPPLY
1
NC
2
GND
3
PGOOD
4
KEY
5
VBAT
6
RSVD
7
EHORBAT
8
I/O 2
9
I/O 1
10
+5V
11
V+
12
R5 2M R5 2M
E2
GND
E2
GND
JP1JP1
R1 2M R1 2M
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