NJM2855 New Japan Radio Co.,Ltd, NJM2855 Datasheet - Page 4

• Manufacturer Part Number: NJM2855
• Description: Njm2855 Low Dropout Voltage Regulator
• Manufacturer: New Japan Radio Co.,Ltd

4
Input Capacitance C
Output Capacitance Co
Input Capacitance C
with high power supply impedance or a long power supply line.
Use the C
C
This product is designed to work with any capacitor including a low ESR capacitor for the Co; however,
refer "Equivalent Series Resistance vs. Output Current" and choose suitable capacitor.
Output capacitor (Co) is required for a phase compensation of the internal error amplifier. The
capacitance and the equivalent series resistance (ESR) influence stability of the regulator.
If use a smaller Co, it 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 greater value and
connect between Vo terminal and GND terminal with minimal wiring.
The recommended capacitance depends on the output voltage. Low voltage regulator requires greater
value of the Co. Thus, check the recommended capacitance for each output voltage.
Use of a greater Co reduces output noise and ripple output, and also improves transient response of
the output voltage against rapid load change.
IN
should connect between GND and V
IN
value of 0.33µF greater to avoid the problem.
IN
IN
is required to prevent oscillation and reduce power supply ripple for applications
IN
as short as possible.
NJM2855
Ver.2008-06-16