MAX5903LCEUT+T

Hot Swap Controllers Overview

The MAX5903LCEUT+T is a hot-swap voltage controller designed for safe insertion of circuit cards into live backplanes. It operates within a supply voltage range of +9V to +72V and features an adjustable current limit function. The device provides power-fail detection and supports undervoltage lockout (UVLO). It is housed in a compact SOT-23-6 surface-mount package and functions without an internal switch, requiring an external P-channel MOSFET. The component ensures glitch-free hot-plugging by managing inrush current and offering overcurrent protection.

Hot Swap Controllers Feature Summary

• Eliminates external components except the external P-channel MOSFET for simplified hot-swap implementation
• Provides circuit-breaker functionality with adjustable current limiting to protect against overcurrent conditions
• Includes power-fail detection capabilities to monitor supply integrity during operation

Hot Swap Controllers Applications

• Hot-plugging circuit cards into live backplanes
• Power-supply rail sequencing in server systems
• General-purpose hot-swap controller applications

Hot Swap Controllers Procurement Notes

Verify that the specific suffix 'L' corresponds to the intended temperature or grade variant as defined in the official datasheet. Confirm the package type matches the required PCB footprint, as the MAX5903 series includes both SOT-23 and TDFN options. Ensure the external P-channel MOSFET selection aligns with the controller's drive capabilities and voltage ratings. Check RoHS compliance status if required by project specifications.

Hot Swap Controllers Selection Notes

Select this component when a simple, low-component-count solution is needed for high-voltage hot-swap applications up to 72V. It is suitable for designs where an external MOSFET is preferred for higher current handling or thermal management. Consider the adjustable current limit feature for precise load protection. Verify compatibility with the system's UVLO requirements and ensure the SOT-23-6 package fits the mechanical constraints.

Hot Swap Controllers Part Context

The MAX5903LCEUT+T belongs to the Simple Swapper family of hot-swap controllers from Analog Devices/Maxim Integrated. This series focuses on minimizing external component count while providing robust protection features. The MAX5903 variant specifically offers adjustable current limiting, distinguishing it from fixed-limit counterparts. It complements other PMIC solutions by addressing the critical need for safe board insertion in high-voltage environments.

Hot Swap Controllers FAQ

Does the MAX5903LCEUT+T include an internal switch?

No, the device does not contain an internal switch. It requires an external P-channel MOSFET to handle the load current.

What is the operating voltage range for this controller?

The MAX5903LCEUT+T operates from +9V to +72V.