ISL6121LIB

Power Supply Controllers, Monitors Overview

The ISL6121LIB is a single-channel hot swap power controller designed for +5V control applications within the ISL61xx family. It operates with a supply voltage range of 9 V to 15 V and features an integrated charge pump to fully enhance external N-Channel MOSFETs. The device includes hard-wired undervoltage monitoring at approximately 80% of the rail voltage, programmable overcurrent detection, and current regulation with time delay latch-off. It is housed in an 8-pin SOIC package.

Power Supply Controllers, Monitors Feature Summary

• Integrated charge pump enables control of external N-Channel MOSFETs without requiring separate bias voltages.
• Hard-wired undervoltage monitoring provides reliable fault reporting at a fixed threshold percentage.
• Programmable overcurrent detection allows customization of protection levels via external components.
• Current regulation with time delay latch-off ensures robust load protection against sustained faults.

Power Supply Controllers, Monitors Applications

• +5V power distribution systems
• Hot swap server backplanes
• Peripheral card insertion systems

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'LIB' against official Intersil or Renesas documentation to confirm package type and temperature rating. Confirm RoHS compliance status as indicated in the datasheet. Check for end-of-life notifications or alternate manufacturing site changes prior to procurement.

Power Supply Controllers, Monitors Selection Notes

Select this component for +5V rails requiring precise current limiting and soft-start capabilities. Ensure the external MOSFET selected can handle the peak currents managed by the internal regulation circuitry. Verify that the system ground and bias requirements align with the single-channel architecture.

Power Supply Controllers, Monitors Part Context

Part of the ISL6115/6116/6117/6120 family of power distribution controllers. While similar devices target different voltage rails (e.g., ISL6115 for +12V), the ISL6121LIB is specifically optimized for +5V applications with comparable protection features.

Power Supply Controllers, Monitors Replacement Considerations

Consult official substitution guides for equivalent hot swap controllers from Renesas or other manufacturers. Verify pin compatibility and electrical specifications before replacing.

Power Supply Controllers, Monitors FAQ

How does the ISL6121LIB handle overcurrent conditions?

It features programmable overcurrent detection and current regulation with a time delay that triggers a latch-off to protect the load and source.

What is the function of the integrated charge pump?

The integrated charge pump allows the controller to fully enhance the gate of an external N-Channel MOSFET using only the main supply voltage.