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. Features MIC2085: Pin for pin functional equivalent to the
LTC1642 2.3V to 16.5V supply voltage operation Surge voltage protection to 33V 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 (< 1Вµs) Programmable output undervoltage detection Undervoltage lockout protection Power-on reset (MIC2085/86) and power-good
(MIC2086) status outputs /FAULT status output Driver for SCR crowbar on overvoltage Applications RAID systems …
