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CS5160 Datasheet(PDF) 15 Page - ON Semiconductor

Part No. CS5160
Description  CPU 5−Bit Synchronous Buck Controller
Download  18 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS5160 Datasheet(HTML) 15 Page - ON Semiconductor

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CS5160
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15
Layout Guidelines
1.
Place 12 V filter capacitor next to the IC and connect
capacitor ground to pin 11 (PGnd).
2.
Connect pin 11 (PGnd) with a separate trace to the
ground terminals of the 5.0 V input capacitors.
3.
Place fast feedback filter capacitor next to pin 8 (VFFB)
and connect it’s ground terminal with a separate, wide
trace directly to pin 14 (LGnd).
4.
Connect the ground terminals of the Compensation
capacitor directly to the ground of the fast feedback
filter capacitor to prevent common mode noise from
effecting the PWM comparator.
5.
Place the output filter capacitor(s) as close to the load
as possible and connect the ground terminal to pin 14
(LGnd).
6.
Connect the VFB pin directly to the load with a separate
trace (remote sense).
7.
Place 5.0 V input capacitors close to the switching
MOSFET and synchronous MOSFET.
Route gate drive signals VGATE(H) (pin 10) and
VGATE(L) (pin 12 when used) with traces that are a
minimum of 0.025 inches wide.
Figure 23. Layout Guidelines
To the negative terminal of the output capacitors
VCC
100 pF
0.1 μF
SOFT START
OFF TIME
VCOMP
To the negative terminal
of the input capacitors
15
11
5
8
VFFB
1.0 μF


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