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Hot-swap controller features 8bit ADC

Posted: 21 Feb 2006     Print Version  Bookmark and Share

Keywords:LTC4215  hot swap controller  ADC  analogue-to-digital converter  Linear Technology 

Linear Technology Corp. has introduced the LTC4215, a 2.9V to 15V hot swap controller that features an onboard 8bit analogue-to-digital converter (ADC) and I2C-compatible interface. According to the company, the integrated digital power monitoring allows platform management in high-availability systems by measuring card voltages and currents, as well as recording past and present fault conditions. Information in the ADC registers can be queried via the I2C bus and then used to determine if a card is using its allocated power, or operating abnormally. An irregular card can be flagged for service even before it fails.

The LTC4215 turns the board supply voltage on and off in a controlled manner. It offers programmable di/dt softstart and provides active current limiting that result in a controlled supply ramp. The inrush current and circuit breaker limits, as well as the undervoltage/overvoltage thresholds are independently adjustable. The controller disconnects the load if it remains in current limit beyond the time-out delay and can be configured to latch off or auto-retry following the event.

This hot swap controller also has additional features to interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a board and turn off the pass transistor if an external supply monitor fails to indicate power-good within a timeout period.

Specified over the commercial and industrial temperature ranges, the LTC4215 is available from stock in 16-lead SSOP and 24-lead 4-by-5mm QFN packages. Pricing begins at Rs.165.94 ($3.75) each in 1,000-piece quantities.

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Related Datasheets
Part Number Description Category
LTC4215 Hot Swap Controller with I2C Compatible Monitoring ICs, Interface



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