ADM1275-3ARQZ

ADM1275 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. It is used in application such as power monitoring and control/power budgeting, central office equipment, telecommunication and data communication equipment, PCs/servers etc.

• Controls supply voltages from 2V to 20V, PMBus fast mode compliant interface
• Response time (with short glitch filter) is 370ns typ at (VCC = 2.95V to 20V)
• 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 GPOs, power-good status output
• Analog UV and OV protection, peak detect registers for current and voltage
• Quiescent current is 5mAmax at (VCC = 2.95V to 20V)
• ±1% accurate, 12bit ADC for current, VIN/VOUT readback
• Operating temperature range from -40°C to +85°C, package style is 20-lead QSOP

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