Dual-slot device controls 3.3- and 12-V channels

The industry¡¯s first single-chip dual-slot hot-swap manager for Advanced Mezzanine Cards (AdvancedMCs), the TPS2359 is aimed at wireless, telecom and computing systems, including custom, AdvancedTCA (ATCA), and MicroTCA systems. The I2C-programmable controller performs all necessary power interface functions for two AdvancedMCs. Enabling plug-and-play insertion and removal of AdvancedMCs during system operation, the device¡¯s two integrated 3.3-V channels provide inrush control, overcurrent protection and FET ORing control functionality.

Two 12-V channels provide the same functions using external FETs and sense resistors. The controller¡¯s 3.3-V current limits are set at the factory to AdvancedMC-compliant levels and the 12-V current limits can be programmed using external resistors.

The TPS2359¡¯s integrated ORing control capability supports power designs for MicroTCA power modules that manage redundant power in the AdvancedMC slot. When used with a low-RDS(on) n-channel MOSFET, the controller manages power distribution, while protecting the system from reverse-current or transient events by providing a turn-off response of 130 ns. The company also offers the TPS2358 controller, which has dedicated output pins and configuration capability using external components. (Ea/1,000: TPS2359, $5; TPS2358, $4.)