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NCP565 Просмотр технического описания (PDF) - ON Semiconductor

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производитель
NCP565
ON-Semiconductor
ON Semiconductor ON-Semiconductor
NCP565 Datasheet PDF : 17 Pages
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NCP565/NCV565
PCB Layout Considerations
Good PCB layout plays an important role in achieving
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
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 20. The output
voltage is set to 3.3 V for this demonstration board according
to the feedback resistors in the Table 1.
Vin
GND
C1
150 m
C2
150 m
2
Vin
Vout 4
NCP565
1 NC
Adj 5
GND
3
C4
10 m
R2
15.8 k
R1
42.2 k
Vout
C3
150 m
C3
150 m
GND
C6
5.6 p
Figure 20. Schematic of NCP565 Typical Application Circuit
Figure 21. Top Layer
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