R1501 Datasheet, PDF (6/28 Pages) RICOH electronics devices division – Supply Current Typ. 70uA

R1501x
NO.EA-184-160801
TYPICAL APPLICATION
C1
VDD
VOUT
R1501x
Series
CE GND
VOUT
C2
C1=Ceramic 0.47µF
C2=Ceramic 10µF
(External Components)
C2: Ceramic 10µF MURATA: GRM32DB31E106K (size: 3225)
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).
If you use a tantalum type capacitor and ESR value of the capacitor is large, output might be unstable. Evaluate
your circuit with considering frequency characteristics.
Depending on the capacitor size, manufacturer, and part number, the bias characteristics and temperature
characteristics are different. Evaluate the circuit with actual using capacitors.
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 0.47µF 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.
No.2 pin, No.3 pin and No.5 pin of HSOP-6J package must be wired to the GND plane when it is mounted on
board. No.2 pin and No.3 pin of TO-252-5-P2 package must be wired to the GND plane when it is mounted on
board.
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