ADM1276-3ACPZ

ADM1276 is a hot swap controller that allows a circuit board to be removed from or inserted into a live backplane. It also features current and voltage readback via an integrated 12bit analogue-to digital converter (ADC), accessed using a PMBus™ interface. The load current is measured using an internal current sense amplifier that measures the voltage across a sense resistor in the power path via the SENSE+ and SENSE pins. A default limit of 20mV is set, but this limit can be adjusted, if required, using a resistor divider network from the internal reference voltage to the ISET pin. It limits the current through the sense resistor by controlling the gate voltage of an external N-channel FET in the power path, via the GATE pin. The sense voltage and, therefore, the load current is maintained below the preset maximum. It is used in application such as power monitoring and control/power budgeting, central office equipment, telecommunication and data communication equipment, PCs/servers.

• Controls supply voltages from 2V to 20V, PMBus fast mode compliant interface
• 370ns response time to short circuit, resistor-programmable 5mV to 25mV current limit
• ±1% accurate, 12bit ADC for current, VIN/VOUT readback
• Charge pumped gate drive for multiple external N-channel FETs
• High gate drive voltage to ensure lowest RDSON, foldback for tighter FET SOA protection
• Automatic retry or latch-off on current fault, programmable current-limit timer for SOA
• Programmable, multifunction GPO, power-good status output
• Analog UV and OV protection, ENABLE pin
• Reports power and energy consumption over time, peak detect registers for current and voltage
• Operating temperature is -40°C to +85°C, package style is 20-lead LFCSP-WQ

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