NCP565 ON, NCP565 Datasheet - Page 7

• Manufacturer Part Number: NCP565
• Description: 1.5 A Low Dropout Linear Regulator
• Manufacturer: ON

PCB Layout Considerations
good load transient performance. Because it is very sensitive
to its PCB layout, particular care has to be taken when
tackling Printed Circuit Board (PCB) layout. The figures
below give an example of a layout where parasitic elements
are minimized. For microprocessor applications it is
customary to use an output capacitor network consisting of
Good PCB layout plays an important role in achieving
GND
V
in
Figure 16. Schematic of NCP565 Typical Application Circuit
C
150 m
1
C
150 m
2
Figure 17. Top Layer
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2
1
NC
V
NCP565
in
NCP565
GND
3
7
15.8 k
R
V
several capacitors in parallel. This reduces the overall ESR
and reduces the instantaneous output voltage drop under
transient load conditions. The output capacitor network
should be as close as possible to the load for the best results.
The schematic of NCP565 typical application circuit, which
this PCB layout is base on, is shown in Figure 16. The output
voltage is set to 3.3 V for this demonstration board according
to the feedback resistors in the Table 1.
Adj
out
2
4
5
5.6 p
42.2 k
C
R
6
C
10 m
1
4
C
150 m
3
GND
C
150 m
V
out
3