Rev. 1.10

- 5 -

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, be

sure to use a 2.2

(Note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase compensation,

the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the

PCB.)

PCB Layout

Make VDD and GND line sufficient. When the impedance of these is high, it would be a cause of picking up the noise or

unstable operation. Connect a capacitor with as much as 1.0

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

C2 = Ceramic 2.2

µF

*

C1 = Ceramic 1.0

µF

C1

V

OUT

C2

GND

CE

3

4

R1141Q

SERIES

I

OUT

1

2

V

Fig.1 Standard test Circuit

C2 = Ceramic 2.2

µF

*

C1 = Ceramic1.0

µF

A

I

SS

C1

C2

GND

CE

3

4

R1141Q

SERIES

1

2

Fig.2 Supply Current Test Circuit