LM5069

• Wide operating range: 9 V to 80 V
• In-rush current limit for safe board insertion into live power sources
• Programmable maximum power dissipation in the external pass device
• Adjustable current limit
• Circuit breaker function for severe overcurrent events
• Internal high side charge pump and gate driver for external N-channel MOSFET
• Adjustable undervoltage lockout (UVLO) and hysteresis
• Adjustable overvoltage lockout (OVLO) and hysteresis
• Initial insertion timer allows ringing and transients to subside after system connection
• Programmable fault timer avoids nuisance trips
• Active high open drain POWER GOOD output
• Available in latched fault and automatic restart versions
• 10-Pin VSSOP package

The LM5069 positive hot swap controller provides intelligent control of the power supply connections during insertion and removal of circuit cards from a live system backplane or other hot power sources. The LM5069 provides in-rush current control to limit system voltage droop and transients. The current limit and power dissipation in the external series pass N-Channel MOSFET are programmable, ensuring operation within the Safe Operating Area (SOA). The POWER GOOD output indicates when the output voltage is within 1.25 V of the input voltage. The input undervoltage and overvoltage lockout levels and hysteresis are programmable, as well as the initial insertion delay time and fault detection time. The LM5069-1 latches off after a fault detection, while the LM5069-2 automatically restarts at a fixed duty cycle. LM5069 is available in a 10-pin VSSOP package.