SMH4046 Datasheet | Summit Microelectronics

Features & APPLICATIONS - Full voltage Control for hot-swap applications - Add-in Card insertion detection - Platform voltage detection - Universal FPGA configuration I/O pins - High Voltage and logic level enable outputs - Active control (ADOCTM) for three downstream DC/DC converters with ±0.5% accuracy - Margining of three DC/DC converters - Power-up sequencing of all supply voltages - Power-down sequencing in Forward or Reverse - UV and OV sensors per channel with programmable reset and interrupt - Programmable glitch filter for all channels - Configuration may be locked - Auto monitoring of all channels and Ext Temp - I2CTM serial bus interface - Programmable slew rate control - Integrated 2K EEPROM Applications - Monitor/Control Distributed and POL Supplies - Multi-voltage Processors, DSPs, ASICs used in Tele or server systems INTRODUCTION The SMH4046 is an all-inclusive power management controller that integrates hot swap protection of three positive-voltage supplies (+12V or less). In addition to hot swapping three bus voltages, it provides sequencing and Active DC Output Control (ADOCTM) of three on-card DC-DC converters as used in blade servers and Tele systems. It can also upload configuration code from the host to on-card FPGAs. All six channels can cascade-sequence during powerup in any order as set by either hardware or firmware; and sequence down in forward or reverse order. ADOCTM control of the three DC/DC converters maintains their accuracy to within ±0.5% of the set point using an internal voltage reference. ADOCTM is also included during “margining” to allow card-by-card performance evaluation during production with arbitrary setting within ±10% in any bination. A full set of monitoring and control Features are included, with user programmability that can be locked. The SMH4046 uses the I2C bus interface for programming and FPGA configuration. Ejector Switch FS TYPICAL APPLICATIONS DRAWING BD_SEL1# FPGA 5 FPGA_CFGDNE FPGA_NSTS PND1# FS VMA...