Low Voltage Detector
The R3117x 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-88A, and DFN(PLP)1010-4 are available. |
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 Supply Current |
Typ. 0.29μA (VDD=6.0V)
Consumption current through SENSE pin is not included. |
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| Operating Voltage Range |
1.0V to 6.0V (-40°C <= Topt <= 105°C) |
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| Detector Threshold Range |
Stepwise setting with a step of 0.1V in the range
of 0.7V to 5.0V |
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| Accuracy Detector Threshold |
±1.0% (-VDET >= 1.6V), ±15mV (-VDET<1.6V) |
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| Temperature-Drift Coefficient of Detector Threshold |
Typ. ±30ppm/°C |
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| Output Types |
Nch Open Drain and CMOS |
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| Packages |
SOT-23-5, DFN(PLP)1010-4, SC-88A |
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| * Topt=25°C, unless otherwise noted. |
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CPU and Logic Circuit Reset
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Battery Checker
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Window Comparator
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Wave Shaping Circuit
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Battery Back-up Circuit
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Power Failure 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
