RP116Z

NO.EA-281-131031

6

TYPICAL APPLICATION

C1

RP116Z

Series

CE

GND

C2

(External Components)

C1, C2

Ceramic 1.0

μF

MURATA: GRM155B31A105KE15

TECHNICAL NOTES

When using these ICs, consider the following points:

Phase Compensation

In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For

this purpose, use a capacitor C2 with 1.0

μF or more.

If a tantalum capacitor is used, and its ESR (Equivalent Series Resistance) of C2 is large, the loop oscillation

may result. Because of this, select C2 carefully considering its frequency characteristics.

PCB Layout

Connect a capacitor C1 with a capacitance value as much as 1.0

close as possible to the pins.

Set external components, especially the output capacitor C2, as close as possible to the ICs, and make wiring

as short as possible.

Impedance of Input pin

CE pull-down constant current circuit is built in the RP116Z.

However, if the CE pin is floating and the wiring is long, the malfunction may occur by noise. Therefore, fully

evaluation on the actual PCB is necessary.