UG067 Rev.2.00
Page 6 of 22
Aug 23, 2017
ISL68200DEMO1Z
PROG1-4
No
Resistor divider must be referenced to the VCC
pin and the system ground; they can be placed
anywhere. DO NOT use decoupling capacitors
on these pins.
GND
Yes
Directly connect to low noise area of the
system ground. The GND PAD should use at
least four vias. Separate analog ground and
power ground with a 0
Ω
resistor is highly NOT
recommended.
LGATE
No
Low-side driver output and short and wide
trace in between this pin and the MOSFET gate
pin as possible. High dV/dt signals should not
be close to any sensitive signals.
UGATE
No
High-side driver output and short and wide
trace in between this pin and the MOSFET gate
pin as possible. High dV/dt signals should not
be close to any sensitive signals.
BOOT,
PHASE
Yes
Place X7R 0.1µF or 0.22µF in proximity to the
BOOT and PHASE pins. High dV/dt signals
should not be close to any sensitive signals.
PVCC
Yes
Place X7R 4.7µF in proximity to the PVCC pin
and the system ground plane.
TABLE 2. DESIGN AND LAYOUT CHECKLIST (Continued)
PIN
NAME
NOISE
SENSITIVITY
DESCRIPTION
TABLE 3. TOP LAYOUT TIPS
NUMBER
DESCRIPTION
1
The layer next to controller (top or bottom) should be a ground
layer. Separate analog ground and power ground with a 0
Ω
resistor is highly NOT recommended. Directly connect GND
PAD to low noise area of the system ground with at least four
vias.
2
Never place controller and its external components above or
under the VIN plane or any switching nodes.
3
Never share CSRTN and VSEN on the same trace.
4
Place the input rail decoupling ceramic capacitors closely to
the high-side FET. Never use only one via and a trace to
connect the input rail decoupling ceramics capacitors; must
connect to the VIN and GND planes.
5
Place all decoupling capacitors in close proximity to the
controller and the system ground plane.
6
Connect remote sense (VSEN and RGND) to the load and
ceramic decoupling capacitors nodes; never run this pair
below or above switching noise plane.
7
Always double check critical component pinout and their
respective footprints.
