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R1516H030B-T1-FE Datasheet(PDF) 7 Page - RICOH electronics devices division |
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R1516H030B-T1-FE Datasheet(HTML) 7 Page - RICOH electronics devices division |
7 / 14 page R1516x NO.EA-258-140703 7 TYPICAL APPLICATION C1 R1516x Series VDD VOUT CE GND C2 C1=Ceramic 0.1 μF C2=Ceramic 0.1 μF VOUT 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. |
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