7
dc2681aaf
DEMO MANUAL DC2681A-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
35V
6V - 15V
*
DYNAMIC LOAD CIRCUIT
DO NOT EXCEED 5% DUTY CYCLE!
1.0V
OFF
ON
2V
2TPF330M6
VOUT
GND
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL CAPACITORS AND RESISTORS ARE 0603.
MODULE REGULATOR
m
LTM4647EY
*
LTM4645EY
25
LTM4647EY
30
-A
-B
*
ASSY
AMP
IC
AMP
VIN
VOUT
VOUT
VIN
INTVCC
INTVCC
INTVCC
INTVCC
VIN
INTVCC
INTVCC
VIN
SVIN
SVIN
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
YL
PRODUCTION
1
02-27-17
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
YL
PRODUCTION
1
02-27-17
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
YL
PRODUCTION
1
02-27-17
__
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
Monday, February 27, 2017
11
SINGLE-OUTPUT, HIGH EFFICIENCY STEP-DOWN
LT
YL
B
LTM4645EY / LTM4647EY
DEMO CIRCUIT 2681A(A,B)
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
Monday, February 27, 2017
11
SINGLE-OUTPUT, HIGH EFFICIENCY STEP-DOWN
LT
YL
B
LTM4645EY / LTM4647EY
DEMO CIRCUIT 2681A(A,B)
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
Monday, February 27, 2017
11
SINGLE-OUTPUT, HIGH EFFICIENCY STEP-DOWN
LT
YL
B
LTM4645EY / LTM4647EY
DEMO CIRCUIT 2681A(A,B)
E10
VIN
E15
GND
J2
C5 120pF
COUT3 OPT 1210
E4
INTVCC
JP2
RUN
1
3
2
+
COUT12
R25 2.2
E3
DRVCC
C11 1uF
R24 OPT
R1
0
CIN2 OPT 1206
E13
GND_SNS
COUT2 100uF 1210
R4 100k
E7
PGOOD
R8 OPT
E16
SVIN
R27
0
J1
VIN
E6
HIZB
R28 OPT
C7 OPT
E8
COMP
P1
R6 0
COUT4 100uF 1210
J5 VOUT
1
2
3
4
5
E14
IOSTEP_CLK
COUT10 OPT 1210
C6 OPT
R14
10
E9
MODE/PLLIN
R16
10
R22 OPT
R18
0
E2
CLKOUT
R3 10k
Q1
SUD50N04-8M8P
2
1
3
4
E12
VOUT_SNS
R15 90.9k
C4 OPT
E17
TEMP-
J3
GND
E5
TRK/SS
C9 OPT
R13
0
J4
R26 49.9k
E18
TEMP+
COUT9 OPT 1210
E1
RUN
+
CIN1 150uF
JP1
EXT_CLK
PS
CCM
MODE
BM
1
3
2
4
6
5
7
8
R20 0.01 2010
R9 47.5K
COUT5 OPT 1210
R11
OPT
COUT6 OPT 1210
CIN4 22uF 1210
+
COUT7 330uF
COUT1 100uF 1210
CIN5 OPT 1210
R19 10K
R21 0
R17 OPT
CIN3 22uF 1210
C3 0.1uF
C2 4.7uF 10V
+
COUT11 OPT
C8 1uF
0805
U1
LTM4645EY
VOUT
J1
GND
A5
GND
A7
PWM
B4
TE
ST1
B6
GND
D1
TE
ST2
D5
RUN
A6
HIZ
B
E5
CLK
OU
T
B5
FB
E6
PHASMD
C7
COMPb
H7
COMPa
H6
VOSNS-
G5
VOSNS+
G6
INTV
CC
C6
DR
VC
C
C5
SW
F3
VIN
B1
VIN
A3
VIN
A2
VIN
A1
GND
C3
VIN
C2
VIN
C1
GND
B3
VIN
B2
SGND
E7
TEST3
F7
GND
D2
GND
D3
GND
D4
GND
A4
SVIN
D6
TEMP
-
E1
GND
E2
GND
E3
TEMP
+
F1
GND
F2
GND
F4
GND
F6
GND
G1
GND
G2
GND
G3
GND
G4
GND
H1
GND
H2
GND
H3
GND
H4
GND
H5
GND
J5
GND
J7
GND
J6
GND
K5
GND
K7
GND
K6
GND
C4
GND
E4
VOUT
J3
VOUT
J2
VOUT
J4
VOUT
K1
VOUT
K2
VOUT
K3
VOUT
K4
VOUT
L1
VOUT
L2
VOUT
L3
VOUT
L4
VOUT
L5
VOUT
L6
VOUT
L7
MO
DE
/P
LLI
N
B7
FR
EQ
D7
PGOOD
G7
TR
ACK/SS
F5
R10
OPT
+
COUT8
J6 IOSTEP
1
2
3
4
5
P2
R23 OPT
E11
GND
VOSNS+
RUN
VOSNS-
TEMP-
TEMP+
