Texas Instruments LM5069 Positive Hot Swap Controller, 9V to 80V

The Texas Instruments LM5069 is a sophisticated positive hot swap controller designed to intelligently manage power supply connections. It is engineered to facilitate the safe insertion and removal of circuit cards from a live system backplane or other active power sources, protecting sensitive components from harmful electrical transients and ensuring system stability.

A core function of the LM5069 is in-rush current control, which effectively limits system voltage droop and transient spikes during the connection process. This helps maintain the integrity of the power bus and prevents damage to the connected card and the host system. The controller features programmable current limit and power dissipation settings for the external series-pass N-Channel MOSFET, guaranteeing that the operation remains securely within the device's Safe Operating Area (SOA) for reliable, long-term performance.

The integrated POWER GOOD output provides a clear indication when the output voltage is within 1.25V of the input voltage, offering a reliable status signal for system monitoring. The device offers extensive programmability, including adjustable input undervoltage and overvoltage lockout levels with hysteresis, as well as configurable initial insertion delay and fault detection times. This flexibility allows designers to tailor the protection scheme to the specific requirements of their application.

Housed in a compact, surface-mount MSOP package, the LM5069 is suitable for high-density board designs across a wide industrial temperature range. Its robust feature set makes it an essential component for enhancing the reliability and serviceability of systems requiring hot-swap capability.