Current loops must be kept as
short and narrow as possible.
The IC ground and power ground
must meet at the return for the input bulk capacitor. Ensure that high frequency
and high current from the power stage does not go through the signal ground
paths.
A high-frequency bypass capacitor
(C3) must be placed across VCC and GND pins as close as possible
to the pins.
Resistor R8 and
capacitor C7 form a low-pass filter for the current sense signal.
C7 must be as close to CS and GND pins as possible.
Capacitor C5 must be
as close to VREF and GND pins as possible.