Applications Information: continued
80mV
IMAX
RTRACE
=
This causes the output voltage to be +40mV with no load,
and -40mV with a full load, improving regulator transient
response. This trace must be wide enough to carry the full
output current. (Typical trace is 1.0 inch long, 0.17 inch
wide). Care should be taken to minimize any additional
losses after the feedback connection point to maximize reg-
ulation.
7. If DC regulation is to be optimized (at the expense of
degraded transient regulation), adaptive voltage position-
ing can be disabled by connecting to VFB pin directly to the
load with a separate trace (remote sense).
8. Place 5V input capacitors close to the switching MOS-
FET.
Route gate drive signal VGATE (pin 10) with a trace that is a
minimum of 0.025 inches wide.
VCC
To the negative terminal of the
0.1µF
input capacitors
15
11
1.0µF
V
COMP
100pF
V
FFB
8
5
SOFTSTART
OFF TIME
To the negative terminal of the output capacitors
Figure 18: Layout Guidelines
12
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
