TPS2458 Datasheet | Texas Instruments

.ti. SLUS916B - FEBRUARY 2009 - REVISED MAY 2010 12-V/3.3-V Hot Swap and ORing Controller with Load Current Monitor for Advanced MC™ Check for Samples: TPS2458 Features - 2 ATCA Advanced MC™ pliant - Full Power Control for an Advanced MC™ Module - Programmable 12-V Current Limit and Fast Trip - Optional 12-V ORing Control for Micro TCA™ - Internal 3.3-V Current Limit - Programmable Shunt Gain - Interlock Requires 3.3-V Output Prior to 12 V - 12-V and 3-V Power Good and Fault Outputs - Load Current Monitor - 32-Pin PQFN Package APPLICATIONS - ATCA Carrier Boards - Micro TCA™Power Modules - Advanced MC™ Slots - Systems Using 12 V and 3.3 V - Base Stations DESCRIPTION The TPS2458 Advanced MC™ slot controller is fully pliant with the Advanced MC™ Standard and provides the required accuracy to meet the demands of an Advanced MC™ (Advanced Mezzanine Card) module. The TPS2458 is an extremely flexible solution that protects both the power supply and the load by limiting the maximum current into the load and shutting off in case of a fault. If a severe fault occurs the current shuts off immediately. Optional ORing support is inherent in the architecture and can be used in Micro TCA™, or other applications requiring ORing support. The 3.3-V management channel is internal and requires only one external resistor for load monitoring and one external capacitor to set fault time. To ply with the Advanced MC™ requirements, the 12-V output is disabled unless the 3.3-V Power Good signal is asserted. Load current monitors are provided for both the 12 V and 3.3 V channels. Status outputs include Power Good and Fault indicators for each channel. The TPS2458 is in a 32-pin PQFN...