R1510S Datasheet, PDF (15/41 Pages) RICOH electronics devices division – Input Voltage Range (Maximum Rating) Max. 36.0V (50V)

TYPICAL APPLICATIONS
R1510SxxxA
VOUT
COUT
VOUT
NC
VDD
GND
CIN
VIN
R1510SxxxA
TP ^SERIES TP
DOUT
CE
Rpull-up
VCE
Vpull-up
R1510SxxxC/D
VOUT
COUT
VOUT
VDD
NC
GND
R1510SxxxC/D
TP ^SERIES TP
CIN
VIN
DOUT
Rpull-up
Vpull-up
CD
CD
R1510S
NO.EA-185-140724
R1510SxxxB
VOUT
COUT
VOUT
VDD
CIN
VIN
NC
GND
R1510SxxxB
TP ^SERIES TP
DOUT
Rpull-up
SENSE
Vpull-up
VSENSE
CIN=0.1μF, COUT=6.8μF (Ceramic)
Rpull-up=100kΩ
TECHNICAL NOTES
Phase Compensation
This IC is using the capacitance of output capacitor (COUT) and the ESR as phase compensation for the stable
operation of the IC even if the output load varies. Therefore, please make sure to use a capacitor (COUT) with
6.8µF or more.
If the ESR value is large, the output may result in unstable, therefore, please make full evaluation on the
temperature characteristics and the frequency characteristics.
PCB Layout and GND Wiring
The high impedances of VDD and GND could be a reason for the noise pickup and unstable operation. Therefore,
make the impedances of VDD and GND as low as possible. A capacitor (CIN) with 0.1µF or more has to be
connected between VDD pin and GND pin, and the wirings between them have to be short as possible. The
capacitor (COUT) for phase compensation has to be connected between VOUT pin and GND pin, and the wirings
between them have to be short as possible.
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