R1122N

8

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

Resistance).

(Note: When the additional ceramic capacitors are connected to the output pin with the output capacitor for

phase compensation, the operation might be unstable. Because of this, test these ICs with the same external

components as the ones to be used on the PCB.)

Recommended Capacitors ; GRM40X5R225K6.3 (Murata)

GRM40-034X5R335K6.3 (Murata)

GRM40-034X5R475K6.3 (Murata)

PCB Layout

result. Connect a capacitor with a capacitance of 2.2

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

as possible.

TYPICAL APPLICATION

IN

GND

R1122Nxx1A

Series

CE

OUT

Cap.

+

Cap.

+

IN

GND

R1122Nxx1B

Series

CE

OUT

Cap.

+

Cap.

+

(External Components)

Output Capacitor ; Ceramic 2.2

μF (Set output voltage in the range from 2.5 to 5.0V)

Ceramic 4.7

μF (Set output voltage in the range from 1.5 to 2.5V)

Input Capacitor ;

Ceramic 2.2

μF