10
dc1811baf
DEMO MANUAL DC1811B-A
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
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
OPT
2010
2010
OPT
VOUT1
DYNAMIC LOAD CIRCUIT
DO NOT EXCEED 5% DUTY CYCLE!
BLEEDER LOADS
OPTIONAL JUMPER FOR DUAL PHASE SINGLE OUTPUT CONFIGURATION
2010
WITH POWER SYSTEM MANAGEMENT
VOUT0
VOUT1
VOUT0
VOUT1
COMP0a
COMP1a
GPIO0B
GPIO1B
RUN0
RUN1
SIZE
DATE:
IC NO.
REV.
SHEET
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 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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Friday, October 24, 2014
23
DUAL STEP-DOWN uMODULE REGULATOR
HZ
JIAN L.
N/A
LTM4676EY / LTM4676AEY
DEMO CIRCUIT 1811B
SIZE
DATE:
IC NO.
REV.
SHEET
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 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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Friday, October 24, 2014
23
DUAL STEP-DOWN uMODULE REGULATOR
HZ
JIAN L.
N/A
LTM4676EY / LTM4676AEY
DEMO CIRCUIT 1811B
SIZE
DATE:
IC NO.
REV.
SHEET
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 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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Friday, October 24, 2014
23
DUAL STEP-DOWN uMODULE REGULATOR
HZ
JIAN L.
N/A
LTM4676EY / LTM4676AEY
DEMO CIRCUIT 1811B
R52 10K
R52 10K
R38
OPT
R38
OPT
E22
GND
E22
GND
J3J3
1
2
3
4
5
R50R50
Q1 SUD50N04
Q1 SUD50N04
2
1
3
4
R49 2010
OPT
R49 2010
OPT
J4
IOSTEP
J4
IOSTEP
1
2
3
4
5
E23
SGND
E23
SGND
R48 2010
0.5W 0
R48 2010
0.5W 0
R35
OPT
R35
OPT
J2
VOUT0
J2
VOUT0
1
2
3
4
5
C24 1uF
C24 1uF
C22 1uF
C22 1uF
R41
OPT.
R41
OPT.
E20
IOSTEP_CLK
E20
IOSTEP_CLK
R51R51
E24
SGND
E24
SGND
C21 1uF
C21 1uF
R53 0.01
R53 0.01
C23 1uF
C23 1uF
