12
dc2194af
DEMO MANUAL DC2194A
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
4.5V-20V
1.8V / 4 A
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603.
6.3V
ON
10V
1.2V / 4 A
TRACK1 SEL.
CCM
DCM
SOFT-START
EXT
OFF
R2
25SVPF100M
RUN1
CLKOUT PHASE
120
90
60
o
o
o
2
PRODUCTION
GL
01/28/16
CLKIN
ON
OFF
RUN2
1%
LT
GL
m
2
25V
4.5V<VIN<20V
4.5V<VIN<5.3V
2.375V<VIN<4.5V
CPWR=VIN
DRVCC, CPWR=VIN
CPWR= EXT. 5V
R13 = 0 OHM R15 = OPT
R15 = 0 OHM R13 = OPT R15 = OPT
R13 = 0 OHM
VIN
VO1+
VO1-
INTVCC
VOUT1
INTVCC
VO1+
INTVCC
VFB1
VFB1
INTVCC
INTVCC
INTVCC
CPWR
CPWR
VOUT1
VOUT2
VIN
VIN
VO2+
VO2-
VOUT2
VOUT1
VFB2
RUN1
RUN2
VOUT2
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
__
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
Thursday, January 28, 2016
12
HIGH DENSITY, DUAL 4A STEP-DOWN
N/A
LTM4642IY
DEMO CIRCUIT 2194A
MODULE REGULATOR
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
Thursday, January 28, 2016
12
HIGH DENSITY, DUAL 4A STEP-DOWN
N/A
LTM4642IY
DEMO CIRCUIT 2194A
MODULE REGULATOR
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
Thursday, January 28, 2016
12
HIGH DENSITY, DUAL 4A STEP-DOWN
N/A
LTM4642IY
DEMO CIRCUIT 2194A
MODULE REGULATOR
R34 OPT
R7
60.4K
C8 4.7uF
E4
VIN+
C14 OPT
J6
VOUT1
J7
GND
R32 0
R19
60.4K
CIN3 22uF 25V 1206
E7
VO1-
R11 10K
R33
0
J4
VIN
COUT4 22uF
1206
COUT2 OPT 1206
R12 10K
R24 OPT
J5
GND
JP5
1
3
2
J8
VOUT2
U1
LTM4642IY
VOUT1
F1
VOUT1
G1
VOUT1
G2
VOUT1
H1
VIN1
G7
VIN1
G6
VIN1
G5
VOUTS-
F3
VOUTS1
F2
CLKOUT
D4
TRKSS1
F5
RUN1
G3
VRNG1
G4
COMP1
E3
PHASMD
B4
GND
C2
GND
D1
GND
D5
GND
E1
GND
H6
GND
E5
GND
E7
GND
F7
GND
H4
GND
H5
SGND
E2
SGND
D2
RUN2
B3
TRKSS2
C5
VFB2
C4
COMP2
D3
DRVCC
E6
INTVCC
D7
EXTVCC
D6
MODE_PLLIN
C3
FREQ
E4
SW1
H3
VFB1
F4
VOUT2
C1
VOUT2
B2
VOUT2
B1
VOUT2
A2
PGGOD1
F6
PGOOD2
C6
CPWR
C7
VIN2
B5
VIN2
B6
VIN2
B7
VOUT1
H2
VOUT2
A1
GND
H7
SW2
A3
GND
A4
GND
A5
GND
A6
GND
A7
R14 2.2
C15
0.01uF
COUT1 22uF 10V 1206
COUT5 OPT 1206
E12
CLKOUT
C2 OPT
VOUT1
TRACK2 SEL.
JP6
1
3
2
4
5
6
C12 220pF
C3
OPT
CPWR
E14
R10 OPT
R31 0
TRACK2
E13
JP1
1
3
2
4
R23 255K
R22 60.4K
JP3
SOFT-START
TRACK
1
3
2
E6
VO1+
C10
OPT
R1 0
CIN2 22uF 25V 1206
J3
GND
+
COUT6 150uF 4V
C7 4.7uF
JP4
1
3
2
C20 4.7uF
MODE/PLLIN
JP2
1
3
2
4
5
6
C4
OPT
R20
60.4K
C1
220pF
R15 OPT
R5
49.9k
R13 0
R6
OPT 0805
E11
VO2+
C5
0.01uF
E15
RUN1
R4
0
E2
RUN2
R17
60.4K
R9 255K
SW1
E10
CLKIN
+
CIN1 100uF
E9
VO2-
SW2
C13
OPT
C9
4.7uF
R8
30.1K
EXTVCC
E3
PGOOD2
E1
0
R16
OPT 0805
E5
VIN-
+
COUT3 150uF 4V
R18
0
PGOOD1
E16
C6
OPT
R21
60.4K
E8
TRACK1
C11
OPT
R3 30.1k
