MAX4373FEUA+TGC1

Overview

The MAX4373FEUA+TGC1 is a low-cost, micropower high-side current-sense supervisor featuring an integrated amplifier, comparator, and bandgap reference. It operates from a single +2.7V to +28V supply with a 50µA typical supply current. The device provides a voltage output proportional to the sense resistor voltage drop, eliminating external gain-setting resistors. It features a 0 to +28V input common-mode range independent of supply voltage. The specific 'F' suffix indicates a fixed gain of +50V/V. The comparator output is latching to prevent oscillation during overcurrent events.

Feature Summary

• Integrated high-side current-sense amplifier with internal bandgap reference
• Latching open-drain comparator output prevents oscillation during fault conditions
• Voltage output eliminates need for external gain-setting resistors
• Operates with 0V to +28V common-mode range independent of supply voltage

Applications

• Notebook computers
• Portable/battery-powered systems
• Smart battery packs and chargers
• Cell phones
• Power-management systems

Procurement Notes

Verify the exact ordering suffix against manufacturer documentation to confirm package type and reel specifications. Confirm RoHS compliance status as indicated by the '+' symbol in the part number. Ensure the selected variant matches the required gain configuration for the target application circuit design.

Selection Notes

Select this component when a fixed +50V/V gain is required for high-side current monitoring. Verify that the maximum load current produces a sense voltage within the full-scale limits for the +50V/V gain setting. Ensure the system supply voltage remains within the 2.7V to 28V operating range for proper functionality.

Part Context

This device belongs to the MAX4373/MAX4374/MAX4375 family of current-sense supervisors. The MAX4373 variant includes a single latching comparator, while the MAX4374 and MAX4375 include additional comparators for window detection functions. The family offers gains of +20V/V, +50V/V, and +100V/V to accommodate different battery pack sizes and sensitivity requirements.

Replacement Considerations

Compatible substitutes within the same family include MAX4373TEUA+ (Gain +20V/V) and MAX4373HEUA+ (Gain +100V/V). These parts share identical pinouts and functional blocks but differ in amplifier gain settings. Verify that the alternative gain meets the specific voltage scaling requirements of the host system.