LM5069MM-2

Hot Swap Controllers Overview

The LM5069MM-2/NOPB is a positive high-voltage hot swap controller designed for intelligent power supply connection management during circuit card insertion or removal from live backplanes. It operates within a wide voltage range of 9 V to 80 V and features an adjustable current limit with programmable maximum power dissipation in the external N-channel MOSFET, ensuring operation within the Safe Operating Area (SOA). The device includes an internal high-side charge pump and gate driver. Unlike the latched LM5069-1 variant, the LM5069-2 automatically restarts at a fixed duty cycle following a fault detection event.

Hot Swap Controllers Feature Summary

• Provides in-rush current control to limit system voltage droop and transients during board insertion into live power sources.
• Features programmable maximum power dissipation limits for the external pass device to ensure safe operating area compliance.
• Includes adjustable undervoltage lockout (UVLO) and overvoltage lockout (OVLO) with configurable hysteresis levels.
• Offers automatic restart functionality after fault detection, distinct from the latched-off behavior of other variants.

Hot Swap Controllers Applications

• Hot swapping circuit cards on live system backplanes
• Managing power connections in high-voltage industrial systems
• Surge current limiting for sensitive electronic loads

Hot Swap Controllers Procurement Notes

Verify the suffix 'NOPB' indicates lead-free and RoHS compliance as per Texas Instruments standards. Confirm the '-2' designation specifically requires automatic restart behavior rather than latching. Ensure the MSOP-10 package matches your PCB footprint requirements. Check for specific environmental certifications if deploying in regulated industries. Validate that the 9V to 80V input range aligns with your system's power architecture.

Hot Swap Controllers Selection Notes

Select this component when automatic recovery from fault conditions is required without manual intervention. Choose the LM5069MM-2 over the -1 variant if system continuity is prioritized over persistent fault isolation. Ensure the external N-channel MOSFET selected can handle the programmable power limits defined by the controller's settings. Verify that the 10-pin VSSOP package fits the available board space constraints.

Hot Swap Controllers Part Context

This part belongs to the LM5069 series of hot swap controllers from Texas Instruments. It is part of the broader PMIC category focused on power management and protection. The series includes variants like the LM5067 for negative voltage applications and the LM25069 for lower voltage ranges. The MM-2 suffix denotes the specific automatic restart version in the MSOP-10 package.

Hot Swap Controllers Replacement Considerations

• LM5069MM-1/NOPB: Identical hardware but latches off on fault instead of auto-restarting.
• LM5069MMX-2/NOPB: Tape and reel packaging variant of the same functional device.

Hot Swap Controllers FAQ

How does the LM5069MM-2 differ from the LM5069MM-1?

The LM5069MM-2 automatically restarts at a fixed duty cycle after a fault detection event, whereas the LM5069MM-1 latches off and requires a manual reset or power cycle to recover.

What is the function of the POWER GOOD output?

The active high open-drain POWER GOOD output indicates when the output voltage is within 1.25 V of the input voltage, signaling stable operation.