LT4256-3 Linear Technology Corporation, LT4256-3 Datasheet - Page 18

• Manufacturer Part Number: LT4256-3
• Description: Positive High Voltage Hot Swap Controller With Open-circuit Detect
• Manufacturer: Linear Technology Corporation

APPLICATIO S I FOR ATIO
LT4256-3
Layout Considerations
To achieve accurate current sensing, a Kelvin connection
to the current sense resistor (R5 in typical application
circuit) is recommended. Note that 1oz copper exhibits a
sheet resistance of about 530µΩ/
cause large errors in high current applications. Noise
18
U
D2
U
R2
GND
❏
V
IN
. Small resistances can
R3
W
R1
Figure 18. Recommended Component Placement
LT4256-3
U
R9
R5
R7
R8
immunity will be improved significantly by locating resis-
tor dividers close to the pins with short V
traces. The minimum trace width for 1oz copper foil is
0.02" per amp to make sure the trace stays at a reasonable
temperature. 0.03" per amp or wider is recommended.
Figure 18 shows a layout that meets these requirements.
Q1
C1
R6
V
OUT
D1
42563 F18
CC
and GND
42563fa