LM5068

LM5068 www.ti.com SNVS254C – JANUARY 2004 – REVISED MARCH 2013 LM5068 Negative Voltage Hot Swap Controller Check for Samples: LM5068 FEATURES 1 2 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 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 extern...