R1524 Datasheet, PDF (7/32 Pages) RICOH electronics devices division – Input Voltage Range (Maximum Rating) 3.5 V to 36 V (50 V)

TYPICAL APPLICATIONS
R1524x
NO.EA-332-160720
VDD
VOUT
VOUT
C1
R1524x
C2
CE GND
C1 = Ceramic 0.1 µF
C2 = Ceramic 0.1 µF
R1524x Typical Applications
TECHNICAL NOTES
Phase Compensation
In the R1524x, phase compensation is provided to secure stable operation even when the load current is varied.
For this purpose, make sure to use 0.1 μF or more of a capacitor (C2).
In case of using a tantalum type capacitor and the ESR (Equivalent Series Resistance) value of the capacitor
is large, the output might be unstable. Evaluate the circuit including consideration of frequency characteristics.
Connect 0.1 μF or more of a capacitor (C1) between VDD and GND, and as close as possible to the pins.
PCB Layout
For SOT-23-5 package type, wire the following GND pins together: No. 1 and No. 2
For SOT-89-5 package type, wire the following GND pins together: No. 2 and No. 4.
For HSOP-6J package type, wire the following GND pins together: No. 2, No. 4, and No. 5.
Thermal Shutdown
R1524x has a built-in thermal shutdown circuit, which stops the regulator operation if the junction temperature
of this device increases to 160°C (Typ.) or higher. If the temperature drops to 135°C (Typ.) or lower, the regulator
restarts the operation. Unless eliminating the overheating problem, the regulator turns on and off repeatedly and
as a result, a pulse shaped output voltage is generated.
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