MAX34451ETNA2+T

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The MAX34451ETNA2+T is a combination circuit which offers a single supply solution that combines a Voltage Supervisor and Comparator combination, to offer a robust solution for monitoring an IIL and OPL voltage range as well as other potential interfacing applications. It combines a low quiescent current comparator, a low quiescent current voltage supervisor, and a current sense amplifier into a single easy-to-use device.

The MAX34451ETNA2+T belongs in the PMIC (Power Supply Controllers, Monitors) category of components. This device is designed for the purpose of providing supervisor and status reporting with robust, fast and reliable overvoltage/undervoltage fault detection. The device provides two comparator outputs and a voltage supervisor output, which is useful for applications that require two or more different power sources such as battery, cell phone charger or AC/DCs. It is suitable for IIL and OPL voltage range, as well as for other potential interfacing applications.

The device features a 10-bit analog-to-digital (A/D) converter. This A/D converter pad reads in a 10-bit value representing the external voltage input. The output is an on-chip comparator, which can set an alarm signal, which a user can program to an appropriate voltage level. This signal can, in turn, initiate the necessary action to protect the circuit from any unwanted overvoltage or undervoltage condition. The device also features programmable reset hysteresis for the purpose of draping stability in the power supply. Additionally, the device features an on-chip voltage reference for resistive voltage dividers to set the desired voltage level.

The device has several functional blocks all of which are integrated, providing efficiency and cost savings to the user. The comparator includes a low quiescent current comparator that is suitable for a wide range of transducers. The comparator output can be synchronized and configured to operate across a wide range of temperatures. The input of the comparator is coupled to the voltage reference block, while the output is coupled to the voltage supervisor block. This allows a single chip voltage supervisor that is programmable and gives robust protection.

The device also includes a low quiescent current voltage supervisor that can be configured to immediately power down/shut off the system, reducing energy usage and maximizing efficiency. The supervisor features a Level 1 alarm that can be set to match the input characteristics of the transducers and the desired operating operating temperature range. It also features a temperature hysteresis for robust control that enables the system to resist shock or sudden changes during power up.

The device features a current sense amplifier suitable for low current measurement and status reporting. This is useful to configure the device to accurately detect current threshold conditions, allowing for proper control and supervision of the current in the system. The device includes a power-on reset that can be enabled/disabled through a user-programmed pin. This feature allows the device to be configured to reset after a given amount of time or to remain in reset until a specific voltage is reached.

The combination of the above-mentioned features makes the MAX34451ETNA2+T suitable for wide range of applications. It is especially useful for battery management systems, medical equipment, and portable communications systems. This device is also a cost-effective solution that can easily accommodate rapid system changes while maintaining a low input voltage range. Additionally, if a system needs a single-supply solution to monitor multiple power sources, the MAX34451ETNA2+T is ideal for that purpose.

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