MIC2591B Datasheet, PDF (31/34 Pages) Micrel Semiconductor – Dual-Slot PCI Express Hot-Plug Controller

MIC2591B
or plane, for the two inputs (e.g., 12VINA, 12VINB). Finally,
the use of plated-through vias will be necessary to make
circuit connection to the power, ground, and signal planes
on multi-layer PCBs.
PCB Track Width:
0.03" per Ampere
using 1oz Cu
Power Trace
From V_IN
R_SENSE metalized
contact pads
R_SENSE
Power Trace
To MOSFET Drain
Signal Trace
to MIC2591B VIN Pin
Signal Trace
to MIC2591B SENSE Pin
Note: Each SENSE lead trace shall be
balanced for best performance & equal
length/equal aspect ratio.
Figure 13. 4-Wire Kelvin Sense Connections for
R_SENSE
To the input
power supply
High-current
power traces
R_SENSE
Micrel
To the external
MOSFET and load
100pF
1kΩ
VIN
SENSE
MIC2591B
Controller
Figure 14. Current Limit Sense Filter for Noisy
Systems
March 2005
31
M9999-033105