MAX4374HESD+

Overview

The MAX4374HESD+ 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 50µA consumption. The device features a 0 to +28V common-mode input range independent of supply voltage. It offers a fixed gain of +100V/V, 1mV max input offset voltage, and 2% full-scale accuracy. The package is a 14-pin SOIC.

Feature Summary

• Integrates a high-side current-sense amplifier, internal bandgap reference, and a latching comparator for simplified monitoring.
• Features a 0V to +28V common-mode input range that remains functional even during deep battery discharge.
• Provides a voltage output proportional to the sense voltage, eliminating the need for external gain-setting resistors.
• Includes a second comparator in the MAX4374 variant to support window-detection functions.

Applications

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

Procurement Notes

Verify the specific suffix 'H' confirms the +100V/V gain configuration required for the design. Ensure the 'SD' suffix matches the 14-pin SOIC footprint. Confirm RoHS compliance status as indicated by the '+' designation. Cross-reference the operating temperature range against system requirements.

Selection Notes

Select this component when a fixed high gain is needed for precise current monitoring without external resistor networks. The integrated latching comparator prevents oscillation during overcurrent events. Consider the MAX4373 or MAX4375 if different gain values or single/dual comparator configurations are preferred.

Part Context

This part belongs to the MAX4373/MAX4374/MAX4375 family of low-cost, micropower supervisors. These devices combine current sensing with protection logic. The MAX4374 specifically includes two comparators for advanced detection capabilities compared to the single-comparator MAX4373.

Replacement Considerations

MAX4374TESD+ (Gain +20V/V), MAX4374FESD+ (Gain +50V/V). Verify pinout compatibility and gain requirements before substitution.

FAQ

How does the MAX4374 handle overcurrent conditions?

The device uses a latching comparator output that provides a turn-off flag without oscillating, ensuring stable shutdown during overload events.

What is the function of the CIN2 pin on the MAX4374?

CIN2 serves as the input for the second internal comparator, enabling window-detection functions by comparing the sense voltage against the internal reference.