MAX907ESA

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The MAX907ESA is a single high-side capability, power Polarity-Protection comparator, and it is a part of the MAX900 series from Maxim Integrated. It ensures the safe operation of power management switches when supplied or protected with power. This device can detect the presence of low level voltages on the high-side circuit, and open the switch when the voltage falls below a specified threshold. The MAX907ESA is designed to protect against hot-plugging and reverse polarity on the high side of a switch.

MAX907ESA Application Field and Working Principle

The MAX907ESA is a linear comparator, which provides Polarity-Protection and high-side Power switch protection. It is designed for use in hot pluggable or high side connections, and performs power monitoring and over-current detection. Its primary application is protection and monitoring of power switches and high-side applications. It is available in 8-Lead MSOP and is specified over the -40°C to +125°C temperature range.

The MAX907ESA operates as a high-level comparator, meaning that it compares the absolute voltage value on a positive differential voltage input (B+-B-) with the voltage on a single-ended voltage input (A). The output response is immediate when the absolute voltage on the positive input exceeds the voltage on the single-ended input.

Basic Operating Principles

The MAX907ESA linear comparator has two inputs, A and B. The input terminal A is a single-ended voltage input and the other input B has differential voltage inputs. When the absolute value of the voltage on input B (B+) exceeds the voltage on input A (A), the output responds by going to a high logic level. When the voltage on input B falls below the voltage on input A, the output immediately drops to a low logic level. The MAX907ESA is designed to provide over-current protection by monitoring the voltage differential between B+ and B-, and by responding to sudden changes in the differential voltage by quickly switching the output.

Hardware Requirements

The MAX907ESA can be used with several types of power switches and devices that require power monitoring and over-current protection. Its operating voltage range is from 2.5V to 6V, and it is rated for continuous operation at up to 2A depending on the power switch device. A 12V supply voltage is recommended for the MAX907ESA when used with a power switch, and the maximum output load for the comparator is 10mA. The MAX907ESA requires a load resistance of 10KΩ or higher in order to activate the output transistor.

Conclusion

The MAX907ESA is a linear comparator that provides over-current protection and high-side power switch protection. It is designed for use in applications such as hot-pluggable connectors, high side voltage checks, and systems that require over-current protection. Its features and relatively small size make it an ideal choice for power management applications.

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