MAX4375TESD+T

Overview

The MAX4375TESD+T is a low-cost, micropower high-side current-sense supervisor integrating a current-sense amplifier, bandgap reference, and comparator with latching output. It operates from a single +2.7V to +28V supply with a typical supply current of 50µA. The device features a +20V/V gain version, a 0V to +28V common-mode input range independent of supply voltage, and an internal 600mV comparator threshold. It is specified for operation between -40°C and +85°C in a 14-pin SO package.

Feature Summary

• Integrates a high-side current-sense amplifier, bandgap reference, and comparator with latching output to eliminate oscillation during turn-off events.
• Features a 0V to +28V common-mode input range that remains functional even when connected to a battery pack in deep discharge.
• Includes a second comparator specifically designed for window-detection functions to monitor current within defined upper and lower limits.

Applications

• Notebook Computers
• Portable/Battery-Powered Systems
• Smart Battery Packs/Chargers
• Cell Phones
• Power-Management Systems

Procurement Notes

Verify the specific suffix 'SD' corresponds to the 14-pin SO package configuration required for your PCB layout. Confirm the 'T' indicates tape-and-reel packaging if automated assembly is utilized. Ensure the '+T' designation aligns with RoHS compliance requirements for your manufacturing process. Cross-reference the exact part number against the manufacturer's latest ordering guide to confirm availability status.

Selection Notes

Select this component when high-side monitoring is necessary to avoid interfering with the ground path of battery chargers. The integrated latching comparator simplifies overcurrent protection circuits by preventing oscillation. Choose the +20V/V gain variant when designing for larger sense resistors or lower full-scale voltage requirements compared to higher gain options.

Part Context

This device belongs to the MAX4373/MAX4374/MAX4375 family of micropower current-sense supervisors. While the MAX4373 offers a single comparator, the MAX4375 adds a second comparator for window detection. All variants share the same core amplifier architecture and power specifications but differ in pin count and comparator functionality based on the package type.

Replacement Considerations

MAX4374TESD+T

FAQ

How does the MAX4375 handle overcurrent conditions without oscillating?

The device utilizes a latching comparator output. Once the CIN1 input exceeds the 600mV threshold, the output latches into the open state, providing a stable turn-off flag until the RESET pin is pulsed low.

What is the function of the second comparator in the MAX4375?

The second comparator, accessible via the CIN2 and COUT2 pins, enables window-detection functions. It allows the system to monitor if the load current falls within a specific upper and lower limit range.