DESCRIPTION

· The LM5068 hot-swap controller manages power supply connections during circuit card insertion and removal from live backplanes.

· It provides in-rush current control and short-circuit protection, limiting power supply transients.

· Controls an external N-Channel MOSFET for programmable load current limiting and circuit breaker functions.

· Issues a power good (PWRGD) signal after a successful power-on sequence.

· Different versions indicate power-good status either as active HIGH or LOW, with options for latched fault or automatic re-try after fault detection.

FEATURES

· Safe module insertion and removal from live backplanes.

· In-rush current limiting for safe board insertion into live backplanes.

· Fast response to over-current fault conditions with active current limiting.

· Operates within a -10V to -90V input range.

· Programmable under-voltage/over-voltage shutdown protection with adjustable hysteresis.

· Programmable multi-function timer for board insertion de-bounce delay.

· Fault timer to avoid nuisance trips caused by short duration load transients.

· Active gate clamping during initial power application.

· Available in latched fault and automatic re-try versions.

· Available with either active HIGH or LOW power good flag.

APPLICATIONS

· -48V power modules.

· Central office switching.

· Distributed power systems.

· Electronic circuit breaker.

· PBX systems.

· Negative power supply control.