Voltage supervisors are integrated circuits (ICs) that monitor or supervise a voltage within an electronic circuit. They are sometimes referred to as voltage monitors or detectors. Voltage supervisors are found in most electronic applications and are used to prevent system failure and ensure correct system power up.
Voltage supervisors have an output signal which is given if the voltage falls outside of the chose parameters. This signal can be used to enable, disable or reset another device. Supervisors are commonly paired with a microprocessor (MPU) or microcontroller (MCU) device, as they often require a specific voltage range. Voltage supervisors can also be used as a fault detector for a sensor.
Types of Voltage Supervisors:
CMOS voltage detector
Open drain voltage detector
Watchdog timer
Window detector
Back-up battery supervisor
Battery monitoring
Things to consider when choosing a voltage supervisor?
Reset voltage
Supply voltage
Number of channels
Package type
What are processor supervisors?
Processor Supervisors monitor voltage for microprocessors and microcontrollers (MCUs). It is essential that processor parameters are monitored by supervisors to ensure that these parameter boundaries are not exceeded. Exceeding some parameters can result in failure or even a dangerous result.
One of the primary things that a processor supervisor will monitor is voltage. For example, a supervisory circuit monitor may monitor voltages with a threshold of 1.6V to 5V. If the CPU’s circuit voltage falls outside of these limits, the supervisor would create an output signal, for example, a reset output.
Description:
Power supply voltage monitoring and supervisory circuits for
use in desktop, laptop and notebook computers, test and measurement instruments, portable battery-powered equipment and multiple-output power supplies.The Linear Technology series also offers front end protection with their Overcurrent/Overvoltage ...
Description:
The MAX14571/MAX14572/MAX14573 adjustable overvoltage and overcurrent protection devices
are ideal to protect systems against positive and negative input voltage faults up to ±40V and feature low 100mΩ (typ) RON FETs. The overvoltage protector (OVP) feature protects voltages between 6V and ...
Description:
The MIC2774 is a dual power supply supervisor
that provides under-voltage monitoring, manual reset capability, and power-on reset generation in a compact 5-pin SOT package. Monitors two independent power supplies for under-voltage conditionsOne fixed and one user adjustable inputChoice of ...
Description:
The MIC2776 is a power supply supervisor which
provides under-voltage monitoring and power-on reset generation in a compact 5-pin SOT package. Features include an adjustable under-voltage detector, a delay-generator, a manual reset input, and a choice of active-high, active-low, or ...