Low Voltage Detector
The R3117 series are CMOS-based voltage detector ICs with high detector threshold accuracy and ultra-low supply current, which can be operated at an extremely low voltage and is used for system reset as an example.
Each of these ICs consists of a voltage reference unit, a comparator, resistors for detector threshold setting, an output driver and a hysteresis circuit. The detector threshold is fixed with high accuracy internally and does not require any adjustment. The tolerance of the detector threshold is ±15mV(-VDET≤1.5V) or
±1.0%(1.5V<-VDET). Since the sense pin is separated from the VDD pin of the IC, therefore, even if the sense pin voltage becomes to 0V, the output voltage keeps its "L" level.
Two output types, Nch open drain type and CMOS type are available.
Three types of packages, SOT-23-5, SC-88(Under development), and DFN(PLP)1010-4 are available. |
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 Ultra-low Supply Current |
Typ. 0.29μA (at VDD=6.0V@Ta=25°C) |
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| Operating Voltage (VDD side) |
1.0V to 6.0V@Ta=25°C |
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| Operating Temperature Range. |
-40°C to 105°C |
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| Detector Threshold |
Stepwise setting with a step of 0.1V in the range
of 0.7V to 5.0V is possible. |
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| High Accuracy Detector Threshold |
±1.0% (at Topt=25°C) |
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| Detector Threshold Temperature Coefficient |
Typ. ±30ppm/°C |
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| Two Output Types |
Nch Open Drain and CMOS |
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| Three Types of Packages |
SOT-23-5, SC-88, DFN(PLP)1010-4 |
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CPU and Logic Circuit Reset
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Battery Checker
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Level switcher
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Backup switcher
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Blackout detector
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| * All PDF files are less than 1MB unless otherwise stated. |
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Technical Info.
Technical Information on Ricoh Power Management ICs.
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Product Catalog
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| Selection guide is available for download in PDF format. |
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Non-promotion / Discontinued Products
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R3117xSeries
