R1516 Datasheet, PDF (7/14 Pages) RICOH electronics devices division – Input Voltage Range 4V to 36V

TYPICAL APPLICATION
R1516x
NO.EA-258-140703
VDD
VOUT
VOUT
C1
R1516x
Series
C2
CE GND
C1=Ceramic 0.1μF
C2=Ceramic 0.1μF
TECHNICAL NOTES
When using the R1516x Series, please consider the following points.
Phase Compensation
The R1516x Series provide the constant-voltage without using C1 and C2 capacitors. However, if the input line
is too long, C1 should be connected. To minimize the input voltage fluctuation and the transient output voltage
fluctuation that is caused by the load fluctuation, C2 size should be increased. Please refer to the Basic Test
Circuit below when connecting a 0.1µF to 20µF C1 capacitor from VDD to GND, and also connecting a 0.1µF to
20µF C2 capacitor from VOUT to GND. The C1 and C2 capacitors, VDD, GND and VOUT should be connected as
close as possible to each other.
GND Wiring on Boards
For SOT-89-5 package, please connect the No.2 pin and the No.4 pin to the ground plane on the board.
For HSOP-6J package, please connect the No.2 pin, the No.4 pin and the No.5 pin to the ground plane on the
board.
Thermal Shutdown
The thermal shutdown is included, which limits the junction temperature to a maximum 160ºC (Typ.). Under
extreme conditions when the junction temperature begins to rise above 160ºC, the output is turned off, reducing
the output current to zero. When the junction temperature drops below +125ºC (Typ.), the output is turned on
again and the output current is restored to its nominal value. The output repeats turning on and off to form a pulse
shaped output unless the causes of the temperature rise are removed.
Chip Enable (CE) Circuit
The electrical potential level of chip enable (CE) pin should not be set in between VCEH and VCEL. Using the
electrical potentials in between VCEH and VCEL may cause the increase of supply current and may result in unstable
output.
7