DC2194A - Schematic

5
4
3
2
1
REVISION HISTORY
E4
VIN+
VIN
ECO
REV
DESCRIPTION
__
2
PRODUCTION
APPROVED
GL
DATE
01/28/16
J4
VIN
CIN2
22uF
25V
1206
+ CIN1
4.5V-20V
100uF
25V
25SVPF100M
J5
GND
D
CIN3
22uF
25V
1206
E16
E5
VIN-
R13
0
PGOOD1 PGOOD2 CPWR
E14
E1
INTVCC
R11
10K
D
CPWR
INTVCC
C7
4.7uF
R12
10K
VO2+
VOUT1
VO1+
VOUT2
E11
GND
F1
G1
VO1VO1-
G2
R2
0
E7
H1
H2
VO1+
C
COUT4
22uF
10V
1206
B6
VOUT1
VOUT2
VOUT1
VOUT2
VOUT1
VOUT2
VOUT1
VOUT2
VOUT1
VOUT2
o
R4
C2
OPT
2
o
F2
60
B4
D4
4
JP1
C3
E12
CLKOUT
U1
VOUTSVOUTS1
R5
E4
EXTVCC
INTVCC
LTM4642IY
0
3
o
F3
DRVCC
B1
C20
4.7uF
D6
C4
MODE/PLLIN
CLKIN 1
2
OPT
0805
DCM 3
CCM 5
INTVCC
OPT
4
D3
F4
OPT VFB1
R8
60.4K
G3
INTVCC
30.1K
G4
R33
TRACK1 SEL.
3
0
TRKSS2
VFB1
RUN2
C5
RUN1
SGND
VRNG1
SGND
3
VOUT1
1
2
3
4
SOFT-START 5
6
EXT
E2
GND
GND
GND
GND
GND
GND
H7
H6
H5
H4
F7
GND
R9 VIN
255K
RUN1
E7
E5
GND
GND
GND
GND
GND
GND
GND
E1
D5
D1
C2
A7
A6
A4
0.01uF
B
TRACK2 SEL.
D2
60.4K
R21
60.4K
C15
0.01uF
R23
255K
RUN2
VOUT1
60.4K
R20
JP6
B3
TRKSS1
R34
OPT
C5
1
C12
220pF
VFB2
0
JP3
ON
60.4K
VOUT2
C4
VIN
2
SOFT-START
COMP1
GND
TRACK
R18
R19
F5
R7
VFB2
OPT
R17
OPT
OPT
0805
E3
B
E8
SW1
C13
4.7uF
6.3V
C3
6
JP2
TRACK1
C10
OPT
H3
C
E3
C9
R16
A3
C11
A5
CLKIN
R6
VO2-
R15 CPWR
OPT
E6
SW1
E10
C8
4.7uF
R14
2.2
D7
FREQ
COMP2
E9
EXTVCC
MODE_PLLIN
49.9k
VO2-
C1
SW2
SW2
J3
B2
PHASMD
CLKOUT
VOUT2
1.2V / 4 A
J8
150uF
4V
R32
0
INTVCC
220pF
R3
30.1k
1%
+ COUT6
GND
A2
VFB1
1
120
COUT5
OPT
1206
A1
C1
CLKOUT
PHASE INTVCC
VOUT2
B7
VIN2
B5
VIN2
CPWR
VIN2
C7
F6
G7
G6
C6
PGOOD2
150uF
4V
J7
COUT1
22uF
10V
1206
PGGOD1
COUT2
OPT
1206
+ COUT3
VIN1
G5
R1
0
VIN1
VOUT1
1.8V / 4 A
R31
0
VIN1
VOUT1
J6
90
VO2+
E6
VO1+
R22
60.4K
3
ON
E2
2
RUN2
C14
OPT
1
OFF
TRACK2
E13
R24
OPT
RUN2
JP5
2
1
OFF
C6
OPT
JP4
R10
OPT
E15
RUN1
RUN1
CUSTOMER NOTICE
A
4.5V<VIN<20V
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
5
4.5V<VIN<5.3V
CPWR=VIN
DRVCC, CPWR=VIN
2.375V<VIN<4.5V CPWR= EXT. 5V
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
R13 = 0 OHM
R15 = OPT
R13 = 0 OHM
R15 = 0 OHM
R13 = OPT
R15 = OPT
TITLE: SCHEMATIC
HIGH DENSITY, DUAL 4A STEP-DOWN
m MODULE REGULATOR
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
4
TECHNOLOGY
LT
GL
3
2
N/A
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
IC NO.
LTM4642IY
REV.
DEMO CIRCUIT 2194A
Thursday, January 28, 2016
2
SHEET 1
1
OF 2
A
5
4
3
2
1
D
D
Load Transient Circuit
VOUT1
VOUT1
VOUT2
VOUT1
R27
R28
0 Ohm
2010
OPT
2010
VOUT2
VOUT2
J1
C16
1uF
J2
C17
1uF
OPTIONAL JUMPER FOR DUAL PHASE SINGLE OUTPUT CONFIGURATION
C19
1uF
0805
R25
RUN1
OPT
RUN2
C
5
C
Q1
RJK0305DPB
DUTY CYCLE 5% MAX
4
INTVCC
IOSTEP CLK
R26
E17
3
2
1
VFB2
R29
10K
OPT
VOUT1
R35
IOSTEP
10mV / A
VOUT2
J9
OPT
2512
GND
R30
0.010
1W
2512
C18
OPT
E18
B
B
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
TECHNOLOGY
LT
TITLE: SCHEMATIC
GL
HIGH DENSITY, DUAL 4A STEP-DOWN
m MODULE REGULATOR
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
N/A
SCALE = NONE
DATE:
2
IC NO.
LTM4642IY
REV.
2
DEMO CIRCUIT 2194A
Thursday, January 28, 2016
SHEET 2
1
OF 2
A
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