Microprocessor power management with Watchdog Timer
The R5101G Series are CMOS-based μ con power management ICs with high accuracy output voltage and detector threshold and with ultra low supply current. Each of these ICs consists of a voltage regulator, a voltage detector and a watchdog timer. Thus, the R5101G Series have the function of a power management for microprocessor, a monitor of the voltage of a power source and a microprocessor supervisor.
The built-in voltage regulator with an internal driver transistor can supply typically 50mA current to a system when the voltage difference between input and output is 2V. Therefore these ICs are very suitable for various power supply systems for microprocessors. The output voltage is monitored by the voltage detector which is built-in these ICs.
The built-in voltage detector has an output delay function and the delay time can be set by an external capacitor (CD).
The output voltage and the detector threshold voltage can be set individually for each IC by laser trimming.
Furthermore, when a microprocessor works incorrectly, the watchdog timer which checks over microprocessor generates reset signals intermittently to prevent a whole system from being malfunction.
The timeout periods for watchdog and reset can also be set individually by an external capacitor (CTW).
|Built-in a watchdog timer|
|Timeout period for watchdog and generating a reset signal can be set by an external capacitor|
|Watchdog timer can be stopped individually by CE Pin|
|Supply Current||Typ. 5µA|
|Output Voltage Range||1.8V to 5.0V (0.1V step)|
|Output Voltage Accuracy||±2.5%|
|Detector Threshold Range||1.7V to 4.5V (0.1V step)|
|Detector Threshold Accuracy||±2.5%|
|Power-on Reset Delay Time can be set by an external capacitor|
|Output Current||Typ. 50mA (at VIN−VOUT=2V)|
- ・Power source for microprocessors
|Data Sheet||Flyer||Package Info.||Mark Info.||Quality Assurance Data|
|to be prepared|
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