Microprocessor power management with Watchdog Timer for Automotive Applications
The R5104V is a high voltage tolerance CMOS-based microprocessor power management IC with high accuracy output voltage and detector threshold and with ultra low supply current. The IC consists of a voltage regulator, a voltage detector and a watchdog timer. Thus, the R5104V has 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 external driver transistor can supply Min.1A current to a system. Therefore the IC is very suitable for various power supply systems for microprocessors. The built-in voltage detector monitors the output voltage, and 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).
There are two types of power down function: R5104VxxxA and R5104VxxxB. R5104VxxxA can turn off the monitoring of clock input for the watchdog timer, and R5104VxxxB can turn off all the circuits and realize the standby mode.
|Input Voltage Range (Maximum Rating)||MAX. 36.0V (50.0V)|
|Operating Temperature Range||−40°C to 125°C|
|Supply current||Typ. 60µA (IOUT=0mA)|
|Standby Current||Typ. 0.1µA (R5110VxxxB)|
|Output Voltage||3.3V to 5.0V|
|Detector Threshold Voltage||2.8V to 4.0V|
|High Accuracy Output Voltage of Voltage Regulator and Detector Threshold||±2.0%|
|Output Voltage Temperature Coefficient||Typ. ±50 ppm/°C (−40°C to 125°C)|
|Built-in Watchdog Timer|
|Adjustable Timeout Period for Watchdog and Reset by External Capacitor|
|Individual Control for Watchdog Timer by CE Pin|
|Adjustable Power-on Reset Delay Time by External Capacitor|
- ・Power source for control units including EV inverter and charge control.
|Data Sheet||Package||Quality Assurance Data||Suffix||Composition & Content*1|
|SSOP-10||Contact us*1||-KG||Sn-Ag (Ag: 2.5%)|
- *1The composition of the product cannot be specified.
- *2The reliability information is not listed for devices above rank2. Please contact Ricoh sales representatives for further informations.
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