MAX4838EXT

Power Management - Specialized Overview

The MAX4838EXT is an overvoltage protection controller manufactured by Analog Devices Inc./Maxim Integrated. It provides precise voltage monitoring and control for power sequencing applications. The device operates within a supply voltage range of 1.2V to 28V, with a typical supply current of 140µA. It features preset threshold options including 7.4V, 5.8V, and 4.7V to accommodate various system requirements. The component is designed for high reliability in portable electronics, ensuring protection against transient overvoltage events that could damage sensitive circuitry.

Power Management - Specialized Feature Summary

• Integrated overvoltage protection mechanism capable of handling input voltages up to +28V
• Fixed preset threshold voltages available for simplified design implementation
• Low quiescent current consumption suitable for battery-powered devices
• Status flag output for system monitoring and fault indication

Power Management - Specialized Applications

• Overvoltage protection controllers in portable electronic systems
• Power management units for cell phones and mobile devices
• Protection circuits for digital still cameras and media players
• Voltage monitoring in PDAs and palmtop computers

Power Management - Specialized Procurement Notes

Verify the specific suffix (e.g., EXT, E+TG104) to ensure correct package type and temperature rating. Confirm RoHS compliance status through official manufacturer documentation. Check for active or obsolete part status before procurement planning. Ensure compatibility with existing board layout and thermal requirements. Validate supply voltage ranges against target application specifications.

Power Management - Specialized Selection Notes

Choose this component when fixed threshold protection is preferred over adjustable variants. Consider the 140µA supply current for low-power budget constraints. Evaluate the 28V maximum input capability against peak line conditions. Select based on required operating temperature range of -40°C to +85°C. Match preset thresholds (7.4V, 5.8V, 4.7V) to system nominal voltage levels.

Power Management - Specialized Part Context

The MAX4838 series belongs to Maxim Integrated's portfolio of power management ICs focused on protection and sequencing. These components are widely used in consumer electronics where space and power efficiency are critical. The family supports various packaging options to fit different form factors. They serve as key elements in safeguarding batteries and loads from electrical faults.

Power Management - Specialized Replacement Considerations

MAX4838EXT+TG104 is a documented variant with specific tape-and-reel packaging. Cross-reference pinouts and threshold tolerances when substituting. Verify if adjacent models offer adjustable thresholds if flexibility is needed. Check for updated revisions in the same product family.