LTC4225CGN-1#TRPBF Linear Technology, LTC4225CGN-1#TRPBF Datasheet - Page 17

• Manufacturer Part Number: LTC4225CGN-1#TRPBF
• Manufacturer: Linear Technology

Specifications of LTC4225CGN-1#TRPBF

• Lead Free Status / RoHS Status: Compliant

applicaTions inForMaTion
Connect the IN and OUT pin traces as close as possible to
the MOSFETs’ terminals. Keep the traces to the MOSFETs
wide and short to minimize resistive losses. The PCB traces
associated with the power path through the MOSFETs
should have low resistance. The suggested trace width for
1oz copper foil is 0.03" for each ampere of DC current to
keep PCB trace resistance, voltage drop and temperature
rise to a minimum. Note that the sheet resistance of 1oz
copper foil is approximately 0.5mΩ/square, and voltage
IN1
IN2
VIAS TO GND PLANE
CURRENT FLOW
CURRENT FLOW
W
W
TO LOAD
TO LOAD
• • •
• • •
Z1
Z2
Figure 7. Recommended PCB Layout for Power MOSFETs and Sense Resistors
•
•
R
R
S1
S2
•
C1
1
2
3
4
5
6
7
S
S
S
G
S
S
S
G
PowerPAK SO-8
PowerPAK SO-8
24 23 22 21 20
8
M
M
LTC4225UFD
•
•
9
D2
D1
C
C
10 11 12
CP1
CP2
D
D
D
D
D
D
D
D
drops due to trace resistance add up quickly in high cur-
rent applications.
It is also important to place the bypass capacitor, C1, for
the INTV
GND. Also place C
C
suppressors, Z1 and Z2, when used, should be mounted
close to the LTC4225 using short lead lengths.
CP2
near the CPO2 and IN2 pins. The transient voltage
CC
D
D
D
D
D
D
D
D
19
18
17
16
15
14
13
PowerPAK SO-8
PowerPAK SO-8
pin, as close as possible between INTV
R
LTC4225-1/LTC4225-2
R
H2
M
H1
M
H1
H2
CP1
G
G
S
S
S
S
S
S
near the CPO1 and IN1 pins, and
0.03" PER AMPERE
TRACK WIDTH W:
CURRENT FLOW
CURRENT FLOW
ON 1oz Cu FOIL
TO LOAD
TO LOAD
W
W
OUT1
OUT2
422512 F07
17
CC
422512f
and