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Ricoh launches 42V input window voltage detector to monitor overvoltage and undervoltage

Ricoh Europe, Amstelveen, the Netherlands, 13 April, 2017 - Ricoh Europe (Netherlands) B.V. Semiconductor Support Centre has launched the R3152, a high-accuracy window voltage detector operating at a supply voltage up to 42V, intended for use in a wide variety of applications, such as automotive and industrial, as well as consumer equipment. The device consists of two voltage detectors each with built-in, highly accurate hysteresis that makes the device less sensitive to supply voltage noise and ensures stable operation. This allows a single package to perform window, overvoltage and undervoltage detection, providing a reset signal when the supply voltage exceeds an overvoltage or undervoltage threshold.

Conventional voltage detectors are mostly supervising low-voltage power supplies, the power source for the voltage detector and a processor is shared. In case of a failure or slow start-up of this power source, the voltage detector will fail to operate or become unstable.

The R3152 has the significant advantage of use in a higher supply voltage environment powered directly from automotive batteries and industrial equipment, and functioning independent from the power source for the processor. This provides a more secure supervision and guarantees a proper reset signal. The separated power supply pin from the sense pin, make the voltage detector more flexible to monitor a voltage within the circuit.

A built-in voltage regulator stabilizes fluctuation of a car battery, even during a cranking condition. The R3152 monitors for any excessive increase or decrease of the processor supply voltage with high accuracy, thus detecting an operation failure of the system at an early stage. This is especially important for safety critical automotive applications as it improves safety considerably, and useful for ASIL-B/C systems including ECU, ADAS, and control units including EV inverters and charge controllers.

The robust SOT-23-6 package and high withstand voltage of pins are especially designed to prevent any damage to the chip in case short circuit occurs between adjacent pins.

Key features and benefits of the R3152N series
  • Overvoltage and undervoltage detector in one package
  • High Overvoltage and Undervoltage Detection Accuracy and High Hysteresis Accuracy
  • Terminals with high withstand voltage and robust package helps for high reliability
  • Wide Operating Voltage range with maximum of 42V (Absolute Max. Rating 50V)
  • Independent supply voltage and sense terminal

R3152 Features:

Operating Voltage Range (Absolute Max.)3.0V to 42V (50V)
Supply CurrentTyp. 1.5μA
Overvoltage (OV) Detection2.0V to 5.9V (0.01V steps)
Undervoltage (UV) Detection1.6V to 4.8V (0.01V steps)
Detection Release HysteresisTyp.1.0%, Max.1.5% (-40°C to 125°C)
Detection Voltage Accuracy± 0.5% (25°C); -1.25% to 0.75% (-40°C to 125°C)
Release Time DelayTyp. 4ms (CD = 0.01μF)
Output TypeN-channel Open Drain
Operating Temperature Range-40°C to 105°C, -50°C to 105°C, -40°C to 125°C

resp. consumer, industrial, automotive applications
R3152 automotive versionsAEC-Q100 compliant soon
PackageSOT-23-6 (2.9 x 2.8 x 1.1mm)

For further information, please visit or contact:
Ricoh Europe (Netherlands) B.V.
Semiconductor Support Centre
Hans Adams, Manager
Tel: +31 (0) 20 5474 309

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For further information, please contact: 
Ricoh Europe PLC
Jack Gibson
Tel: +44 (0) 203 033 3766
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