MIC2085

MIC2085/MIC2086 Single Channel Hot Swap Controllers General Description The MIC2085 and MIC2086 are single channel positive voltage hot swap controllers designed to allow the safe insertion of boards into live system backplanes. The MIC2085and MIC2086 are available in 16-pin and 20-pin QSOP packages, respectively. Using a few external components and by controlling the gate drive of an external N-Channel MOSFET device, the MIC2085/86 provide inrush current limiting and output voltage slew rate control in harsh, critical power supply environments. Additionally, a circuit breaker function will latch the output MOSFET off if the current limit threshold is exceeded for a programmed period of time. The devices’ array of features provide a simplified yet robust solution for many network applications in meeting the power supply regulation requirements and affords protection of critical downstream devices and components. Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com. Operating temperature range –40°C to 85°C Active current regulation limits inrush current independent of load capacitance Programmable inrush current limiting Analog foldback current limiting Electronic circuit breaker Dual-level overcurrent fault sensing Fast response to short circuit conditions (< 1µs) Programmable output undervoltage detection Undervoltage lockout protection Power-on reset (MIC2085/86) and power-good (MIC2086) status outputs /FAULT sta...