r1115z RICOH Co.,Ltd., r1115z Datasheet - Page 7

• Manufacturer Part Number: r1115z
• Description: Low Noise 150ma Ldo Regulator
• Manufacturer: RICOH Co.,Ltd.

TYPICAL APPLICATIONS
(External Components)
Output Capacitor; Ceramic 0.47 µ F (Set Output Voltage in the range from 2.5 to 4.0V)
Input Capacitor;
TECHNICAL NOTES
Phase Compensation
this purpose, use a capacitor C2. Recommendation value is as follows:
Evaluate your circuit with considering frequency characteristics.
PCB Layout
Connect a capacitor C1 with a capacitance value as much as 1 µ F or more between V
close as possible to the pins.
as short as possible.
If you use a tantalum type capacitor and ESR value of the capacitor is large, output might be unstable.
When using these ICs, consider the following points:
In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For
Make V
Set external components, especially the output capacitor C2, as close as possible to the ICs, and make wiring
C1
DD
Output Voltage
and GND lines sufficient. If their impedance is high, noise pickup or unstable operation may result.
V
2.5
OUT
< =
Ceramic 1.0 µ F (Set Output Voltage in the range from 1.5 to 2.4V)
Ceramic 1.0 µ F
< =
R1115Zxx1A
V
V
CE
2.4V
DD
OUT
Series
GND
V
OUT
C2 recommendation value
C2
0.47 µ F or more
1.0 µ F or more
V
OUT
C1
R1115Zxx1B/D
V
CE
DD
Series
GND
V
OUT
DD
and GND pin, and as
C2
R1115Z
V
OUT
7