LM5068MMX-2/NOPB Datasheet PDF - TI

●DESCRIPTION

●The LM5068 hot-swap controller provides intelligent control of power supply connections during the insertion and removal of circuit cards powered by live system backplanes.

●The LM5068 provides both in-rush current control and short-circuit protection functions, and limits power supply transients in the backplane caused by the insertion of additional circuit cards. The LM5068 controls the external N-Channel MOSFET to provide programmable load current limiting and circuit breaker functions using a single external current sense resistor. The LM5068 issues a power good (PWRGD) signal at the conclusion of a successful power-on sequence. Input over-voltage or under - voltage fault conditions will cancel the PWRGD indication.

●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

●• -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 Avoids Nuisance Trips Caused by Short Duration Load Transients

●• Active Gate Clamping During Initial Power Application

●• Available in both Latched Fault and Automatic Re-Try Versions

●• Available with either Active HIGH or Active LOW Power Good Flag

●APPLICATIONS

●• - 48V Power Modules

●• Central Office Switching

●• Distributed Power Systems

●• Electronic Circuit Breaker

●• PBX Systems

●• Negative Power Supply Control