R1183Z Datasheet, PDF (7/26 Pages) RICOH electronics devices division – 150mA LDO REGULATOR

TYPICAL APPLICATION
IN
C1
1 VDD
VOUT 4
R1183Z
Series
2 CE/NC GND 3
OUT
C2
R1183Z
(External Components)
Output Capacitor
Ceramic Capacitor
0.1µF
murata GRM155B31C104KA87B
kyocera CM05X5R104K16AB
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
this purpose, use a capacitor C2 with good frequency characteristics and ESR (Equivalent Series Resistance).
(Note: If additional ceramic capacitors are connected with parallel to the output pin with an 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 lines sufficient. If their impedance is high, noise pickup or unstable operation may result.
Connect a capacitor C1 with a capacitance value as much as 1.0µF or more between VDD and GND pin, and as
close as possible to the pins.
Set external components, especially the output capacitor C2, as close as possible to the ICs, and make wiring
as short as possible.
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