MAX4959ELB+

Power Supply Controllers, Monitors Overview

The MAX4959ELB+ is a high-voltage overvoltage protection controller manufactured by Analog Devices Inc./Maxim Integrated. It protects low-voltage systems from input voltage faults up to +28V by controlling an external pFET. The device features adjustable overvoltage lockout (OVLO) and undervoltage lockout (UVLO) thresholds via external resistors, with hysteresis of 1%. It operates on a supply voltage of 2.7V to 5.5V with a typical supply current of 100µA. The input range is 4V to 28V. It is housed in a 10-µDFN (2x2mm) package and functions within a temperature range of -40°C to +85°C.

Power Supply Controllers, Monitors Feature Summary

• Provides overvoltage protection for low-voltage systems against input faults up to +28V
• Controls external pFETs to disconnect power when voltage exceeds defined thresholds
• Features adjustable OVLO and UVLO thresholds using external resistor networks
• Includes input debounce timer and blanking time to filter transient signals

Power Supply Controllers, Monitors Applications

• Laptop computers
• Portable computers
• Cameras
• Ultra-mobile PCs

Power Supply Controllers, Monitors Procurement Notes

Verify component status as the MAX4959ELB+ is listed as obsolete or discontinued by major distributors. Confirm availability through authorized channels or alternative sourcing strategies. Ensure compatibility with existing designs before procurement due to potential end-of-life constraints.

Power Supply Controllers, Monitors Selection Notes

Select this component for applications requiring robust overvoltage protection in portable electronics. It is suitable where adjustable threshold control and low quiescent current are critical. Consider the 10-µDFN package size for space-constrained designs. Verify that the external pFET selection matches the current requirements of the protected load.

Power Supply Controllers, Monitors Part Context

The MAX4959ELB+ belongs to the MAX4959/MAX4960 family of overvoltage protection controllers. These devices are designed to safeguard sensitive circuitry in battery-powered and AC adapter-supplied systems. The family offers similar functionality with variations in specific pinouts or internal configurations, but the MAX4959 specifically focuses on high-voltage input protection with adjustable thresholds.

Power Supply Controllers, Monitors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the part is discontinued, engineers should evaluate newer generations of overvoltage protectors from Analog Devices or other manufacturers that offer compatible electrical characteristics and package footprints.