NJM2842

- 5 -

Ver.2011-02-18

b) In use of ON/OFF control:

NJM2842

V

BIAS

V

IN

CONTROL

GND

0.1

µF

R

V

OUT

(*4)

4.7

µF

0.1

µF

(*4) Vo

≤1.0V version: Co=2.2µF

State of control terminal:

“H”

→outputisenabled.

“L” or “open”

→outputisdisabled.

*

When Source impedance is high.

*Output Capacitance Co

Output capacitor (Co) will be required for a phase compensation of the internal error amplifier.

The capacitance and the equivalent series resistance (ESR) influence to stable operation of the regulator.

This product is designed to work with a low ESR capacitor (Co). However use of recommended

capacitance or larger value is effective for stable operation.

Use of a smaller Co may cause excess output noise or oscillation of the regulator due to lack of the

phase compensation.

Therefore use Co with the recommended capacitance or larger value and connect between Vo terminal and GND

terminal with shortest path. The recommended capacitance depends on the output voltage rank. Low voltage

regulator requires larger value Co. Thus, check the recommended capacitance for each output voltage rank.

Use of a larger Co reduces output noise and ripple output, and also improves output transient response a

gainst rapid load change.