MAX5921EESA+

Hot Swap Controllers Overview

The MAX5921EESA+ is a hot-swap voltage controller designed for safe insertion of circuit cards into live backplanes. It operates within an input voltage range of -20V to -80V, making it suitable for -48V power systems. The device features a controlled turn-on mechanism to prevent damage to board connectors and components during insertion. It utilizes an external sense resistor (RSENSE) for current limiting and includes a high gate pulldown current capability. The component is housed in an 8-pin SOIC package.

Hot Swap Controllers Feature Summary

• Enables safe hot-plugging of circuit cards into active backplanes without causing system disruption or hardware damage.
• Provides precise current limiting via an external sense resistor to protect against short circuits and overcurrent conditions.
• Features a controlled ramp-up time to manage inrush currents during power-up sequences.

Hot Swap Controllers Applications

• -48V telecommunications power distribution systems
• Industrial control backplane interfaces
• Telecom equipment card insertion modules

Hot Swap Controllers Procurement Notes

Verify the specific suffix 'E' indicates the industrial temperature grade (-40°C to +85°C) compared to other variants. Confirm RoHS compliance status through official manufacturer documentation as '+ ' denotes lead-free packaging. Check current supply chain availability as this component may be subject to limited stock or obsolescence notices from Analog Devices.

Hot Swap Controllers Selection Notes

Select this part when designing for -48V systems requiring robust protection during live insertion. Ensure the external sense resistor value matches the desired current limit threshold. Verify that the SOIC-8 package footprint aligns with the PCB layout constraints. Compare against pin-compatible alternatives like LT1640 if legacy support is required.

Hot Swap Controllers Part Context

This component belongs to the MAX5921/MAX5939 family of hot-swap controllers manufactured by Maxim Integrated, now part of Analog Devices. These devices are engineered to replace older solutions like the LT1640 and LT4250, offering improved feature sets for managing power delivery in high-reliability environments.

Hot Swap Controllers Replacement Considerations

Publicly confirmed pin-compatible substitutes include the LT1640 and LT4250. Verify functional equivalence regarding current limit settings and thermal performance before substitution.