LM5069MM-1

Hot Swap Controllers Overview

The LM5069MM-1 is a positive high voltage hot swap controller manufactured by Texas Instruments, formerly National Semiconductor. It provides intelligent control for power supply connections during insertion and removal from live backplanes. The device operates within a wide input voltage range of 9 V to 80 V and features adjustable current limiting and programmable maximum power dissipation in the external N-channel MOSFET to ensure safe operation. It includes an internal high-side charge pump and gate driver. The -1 suffix indicates a latched fault response mode, requiring manual reset after a fault event.

Hot Swap Controllers Feature Summary

• Provides in-rush current control to limit system voltage droop during board insertion into live power sources
• Features programmable maximum power dissipation limits to keep the external pass device within its Safe Operating Area
• Includes an internal high-side charge pump and gate driver specifically designed for external N-channel MOSFETs
• Offers adjustable undervoltage lockout (UVLO) and overvoltage lockout (OVLO) with configurable hysteresis

Hot Swap Controllers Applications

• Control of power supply connections during insertion and removal of circuit cards from live system backplanes
• Hot swapping applications requiring intelligent management of power source transients
• Systems necessitating precise in-rush current limiting to prevent voltage sag on shared power rails

Hot Swap Controllers Procurement Notes

Verify that the specific suffix '-1' corresponds to the latched fault detection behavior, as the '-2' variant offers automatic restart. Confirm the package designation matches the required MSOP-10 footprint. Ensure the manufacturer source is identified correctly as Texas Instruments, which acquired National Semiconductor, to guarantee component authenticity and datasheet accuracy.

Hot Swap Controllers Selection Notes

Select this component when a latched shutdown is preferred following a fault condition to prevent repeated stress on the system. Choose the LM5069MM-1 over the LM5069MM-2 if the application design requires explicit intervention before resuming operation after an overcurrent or overtemperature event. Ensure the external MOSFET selection aligns with the programmable power limit settings defined by the external resistors.

Hot Swap Controllers Part Context

The LM5069 belongs to a family of positive hot swap controllers designed for high-voltage applications. While the core functionality regarding in-rush control and power limiting remains consistent across the series, the suffix determines the fault handling strategy. The MM package denotes a compact MSOP-10 surface-mount option suitable for space-constrained designs requiring robust protection for downstream circuitry.

Hot Swap Controllers Replacement Considerations

• LM5069MM-2/NOPB: Identical hardware but features automatic restart instead of latched fault shutdown.
• LM5069MMX-1/NOPB: Tape and reel version of the same latched fault controller.

Hot Swap Controllers FAQ

What is the difference between the LM5069MM-1 and LM5069MM-2 variants?

The primary difference is the fault response mechanism. The LM5069MM-1 latches off after a fault detection and requires a manual reset, whereas the LM5069MM-2 automatically restarts at a fixed duty cycle after a fault.

Does the LM5069MM-1 support negative voltage hot swapping?

No, the LM5069 is a positive hot swap controller. For negative voltage applications, the LM5067 series should be considered.