15
dc1989acf
DEMO MANUAL DC1989A-C
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
DYNAMIC LOAD CIRCUIT
BLEEDER LOADS
µModule REGULATOR WITH DIGITAL POWER MANAGEMENT
ON
OFF
70Hz, 3% Duty Cycle
INT
EXT
1%
1%
0805
IOUT TST
VOUT0
PULSE
BIAS
VOUT0
VOUT1
VIN
VOUT0
+5V
+5V
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
2
Friday, March 15, 2013
66
HIGH EFFICIENCY, POLY-PHASE, DC/DC STEP-DOWN
HZ
JIAN L.
B
LTM4676EY
DEMO CIRCUIT 1989A-C
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
2
Friday, March 15, 2013
66
HIGH EFFICIENCY, POLY-PHASE, DC/DC STEP-DOWN
HZ
JIAN L.
B
LTM4676EY
DEMO CIRCUIT 1989A-C
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
2
Friday, March 15, 2013
66
HIGH EFFICIENCY, POLY-PHASE, DC/DC STEP-DOWN
HZ
JIAN L.
B
LTM4676EY
DEMO CIRCUIT 1989A-C
U7
LTC6992-1
U7
LTC6992-1
MOD
1
GND
2
SET
3
DIV
4
V+
5
OUT
6
R107
82.5
R107
82.5
R109 100K
R109 100K
R104
0
R104
0
JP1JP1
1
2
3
C68 1uF
C68 1uF
R115 20K
R115 20K
C70 1uF
C70 1uF
R106
3.3
R106
3.3
U6
LT1129CS8-5
U6
LT1129CS8-5
OUTPUT
1
SENSE/ADJ
2
GND
3
NC
4
SHDN
5
GND
6
GND
7
VIN
8
R118 0.01
R118 0.01
U8
LT1803IS5
U8
LT1803IS5
VOUT
1
V-
2
+IN
3
-IN
4
V+
5
Q11
SUD50N03-10CP-E3
Q11
SUD50N03-10CP-E3
1
2
3
J10J10
1
2
3
4
5
R113 1.4K
R113 1.4K
R110
5K
R110
5K
R111 20K
R111 20K
Q12
SUD50N03-10CP-E3
Q12
SUD50N03-10CP-E3
1
2
3
R116 10K
R116 10K
R102R102
C64 4.7uF
C64 4.7uF
J11J11
1
2
3
4
5
C69 150pF
C69 150pF
R123
1000K
R123
1000K
R105 681K
R105 681K
C65 1uF
C65 1uF
R114
0
R114
0
JP2JP2
1
2
3
R108 0.01
R108 0.01
C67 0.1uF
C67 0.1uF
R112 100
R112 100
E23
EXT PULSE
E23
EXT PULSE
C66 0.22uF
C66 0.22uF
R103R103
E24
GND
E24
GND
R117 2
R117 2
