MAX4374TESD+

Overview

The MAX4374TESD+ is a low-cost, micropower high-side current-sense supervisor integrating a current-sense amplifier, bandgap reference, and comparator with latching output. It features a voltage output eliminating gain-setting resistors. The device operates from a single +2.7V to +28V supply with 50µA consumption. It offers a 0 to +28V common-mode input range independent of supply voltage. The 'T' suffix indicates a fixed gain of +20V/V. It includes an internal 600mV reference for the comparator and supports window detection via a second comparator.

Feature Summary

• Integrates high-side current-sense amplifier, bandgap reference, and latching comparator in a single solution
• Provides voltage output that eliminates the need for external gain-setting resistors
• Features a 0V to +28V common-mode input range independent of the supply voltage
• Includes a second comparator for window-detection functions

Applications

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

Procurement Notes

Verify the package type matches the required board layout, as this specific part uses a 14-pin SOIC footprint. Confirm the gain specification aligns with the system's full-scale sense voltage requirements. Ensure the operating temperature range meets the environmental conditions of the final assembly. Check for lead-free compliance if required by local regulations.

Selection Notes

Select this component when high-side monitoring is necessary to avoid interfering with battery charger ground paths. The +20V/V gain is suitable for applications requiring lower sensitivity or higher full-scale current ranges compared to the +50V/V or +100V/V variants. Consider the latching output feature if oscillation-free turn-off flags are critical for system protection.

Part Context

This device belongs to the MAX4373/MAX4374/MAX4375 family of current-sense supervisors. The MAX4374 specifically adds a second comparator for window detection capabilities not present in the MAX4373. The 'T' designator specifies the +20V/V gain version, while 'ESD+' denotes the 14-pin SOIC package and RoHS compliance.

Replacement Considerations

MAX4374FEUD+ (Gain +50V/V)

FAQ

How does the MAX4374 handle overcurrent conditions?

The comparator output latches into an open state when CIN1 exceeds the 600mV reference, providing a non-oscillating turn-off flag. The latch can be reset by pulsing the RESET pin low.

What is the function of the second comparator?

The second comparator allows for window-detection functions, enabling the monitoring of current within a specific upper and lower threshold range.