RP114x
No.EA-236-190130
TECHNICAL NOTES ON EXTERNAL COMPONENTS
When using these ICs, consider the following points:
Phase Compensation
In this IC, phase compensation is made for securing stable operation even if the load current is varied. For this
purpose, use a capacitor C2 with 1.0µF or more and good ESR (Equivalent Series Resistance).
(Note: If additional ceramic capacitors are connected with parallel to the output pin with an output capacitor for
phase compensation, the operation might be unstable. Because of this, test this IC with as same external
components as ones to be used on the PCB.)
PCB Layout
Make VDD and GND lines sufficient. If their impedance is high, noise pickup or unstable operation may result.
Connect a capacitor C1 with a capacitance value as much as 1.0µF or more between VDD and GND pins, and
as close as possible to the pins.
Set external components, especially the output capacitor C2, as close as possible to the IC, and make wiring
as short as possible.
Typical Application Circuit
VOUT
VDD
VOUT
RP114x
Series
C1
1.0 µF
C2
1.0 µF
CE GND
CE Control
10
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