LTC4282IUH#PBF

LTC4282 is a hot swap controller allows a board to be safely inserted and removed from a live backplane. Using one or more external N-channel pass transistors, board supply voltage and inrush current are ramped up at an adjustable rate. An I²C interface and onboard ADC allows for monitoring of board current, voltage, power, energy and fault status. Dual 12V gate drive allows high power applications to either share safe operating area across parallel MOSFETs or support a 2-stage start-up that first charges the load capacitance followed by enabling a low on-resistance path to the load. It is well suited to high power applications because the precise monitoring capability and accurate current limiting reduce the extremes in which both loads and power supplies must safely operate. It is used in applications such as enterprise servers and data storage systems, network routers and switches, base stations, platform management etc.

• Monitors current, voltage, power and energy
• Controls two parallel N-channel MOSFETs for SOA sharing in high current applications
• Internal EEPROM for non-volatile configuration, resolution is 12/16bits
• Wide operating voltage range is 2.9V to 33V
• MOSFET power limiting with current foldback, continuously monitors MOSFET health
• Stores minimum and maximum measurements, alerts when alarm thresholds exceeded
• Input overvoltage and undervoltage protection
• Input supply current is 3.5mA typ at (TA = 25°C, VDD = 12V)
• ADC total unadjusted error is ±0.9% typ at (∆VADC, SOURCE, VDD, GPIO,TA = 25°C, VDD = 12V)
• Operating temperature is -40°C to 85°C, package style is 32-lead plastic QFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party