Special Contents for Automotive Applications
The reason RICOH power management IC has been chosen for more than 20 years
Special Contents for IoT Devices
Ultra-low supply current / Low noise / Low electromotive force / Battery monitoring
Special Contents for Industrial Applications
Long term supply / Flexible quantity purchase / High quality and reliability
Application Note : Reset ICs (Voltage Detectors)
When connecting a resistor (R1) to an input of this device, the input voltage decreases by [Device’s Consumption Current] x [Resistance Value] only.
And, the cross conduction current*1, which occurs when changing from the detecting state to the release state, is decreased the input voltage by [Cross Conduction Current] x [Resistance Value] only.
And then, this device will enter the re-detecting state if the input voltage reduction is larger than the difference between the detector voltage and the released voltage.
When the input resistance value is large and the VDD is gone up at mildly in the vicinity of the released voltage, repeating the above operation may result in the occurrence of output.
As shown in Figure A/B, set R1 to become 100 kΩ or less as a guide, and connect CIN of 0.1 µF and more to between the input pin and GND.
Besides, make evaluations including temperature properties under the actual usage condition, with using the evaluation board like this way.
As result, make sure that the cross conduction current has no problem.