RICOH R5104V series User Guide and Manual
Summary
Ensure robust microprocessor operation with the R5104V Series power management ICs. This semiconductor device integrates a voltage regulator, accurate voltage detector, and watchdog timer into one package. It monitors your power source stability and supervisor-controls your system by generating critical reset signals upon detecting malfunctions or droop events. Perfect for complex electronic systems that require reliable, high-tolerance power supply management. The manual details setup, adjustable timings, and various standby modes, making it ideal for engineers designing mission-critical microprocessor applications.
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R5104V SERIES
Microprocessor power management with Watchdog Timer
NO.EA-136-111104
OUTLINE The R5104V Series are high voltage tolerance CMOS-based microprocessor 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 R5104V 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 external driver transistor can supply Min.1A current to a system. 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). There are two kinds of power down function: "A" version turns off the supervisor of clock input for the watchdog timer, while the "B" version turns off all the circuits and realizes the standby mode.
FEATURES • Supply current ................................................ Typ. 60μA (IOUT=0m A) • Standby Current (B version)........................... Typ. 0.1μA • Output Voltage ............................................... 3.3V to 5.0V • Detector Threshold Voltage ........................... 2.8V to 4.0V • Maximum Operating Input Voltage................. Max. 36V • High Accuracy Output Voltage of Voltage Regulator and Detector Threshold ..... ±2.0% • 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 • Power-on Reset Delay Time can be set by an external capacitor • Package ......................................................... SSOP-10
APPLICATION • Power source for microprocessors
Page Summary Contents For RICOH R5104V series User Guide and Manual
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 18 |
| File Size | 905.40 KB |
| Published | June 04, 2026 |
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Frequently Asked Questions
How can I adjust the watchdog or reset timeout periods?
These timeout periods are individually set by connecting an external capacitor (CTW) to Pin 7.
Can I customize the voltage monitoring thresholds individually?
Yes, both the output voltage and the detector threshold voltage can be individually set using laser trimming.
What is the current limit mechanism for this IC?
The ISENSE pin monitors dropout voltage; if the drop exceeds 0.3V (Typ.), the current limit functions.
Which version should I use to achieve a standby state?
Use the 'B' version, which turns off all circuits and realizes the stand-by mode when connected via Pin 9 (CE).