1 What are Wide V_IN Supervisors?

To increase the potential fault coverage of a system, voltage supervisors can be used to monitor a power rail and assert a reset signal when the monitored voltage rises above or falls below a desired threshold. Voltage supervisors are normally used to control protection circuitry for sensitive components and provide consistent behavior in the event of power faults. Wide V_IN supervisors are supervisors which are designed to support a wide input voltage range, typically greater than 18 V, on both the VDD supply pin and independent sense input pin. This allows for a wide range of possible configurations such as monitoring a high sense voltage with a high supply voltage, a high sense voltage with a low supply voltage, a low sense voltage with a high supply voltage, and a low sense voltage with a low supply voltage. An undervoltage (UV) supervisor detects only a voltage falling below the input threshold. An overvoltage (OV) supervisor detects only a voltage rising above the input threshold. A window supervisor provides both overvoltage and undervoltage monitoring, and is single device solution for cases where both types of monitoring are required. Wide V_IN supervisors are typically used to directly monitor a battery that can experience large voltage transients or monitor other common high voltage system rails without the need for extra components to perform level shifting.