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MIC2586/MIC2586R
Single-Channel, Positive High-Voltage
Hot Swap Controller/Sequencer
NOT RECOMMENDED FOR NEW DESIGNS
 
 
Micrel Inc. " 2180 Fortune Drive " San Jose, CA 95131 " USA " tel +1 (408) 944-0800 " fax + 1 (408) 474-1000 " http://www.micrel.com
ecember 2012
 
M9999-122012
 
General Description    
 
The MIC2586 and MIC2586R are single-channel positive
voltage hot swap controllers/sequencers designed to
provide safe insertion and removal of boards for systems
that require live (always-powered) backplanes. These
devices   use   few   external   components   and   act   as
controllers for external N-channel power MOSFET devices
to provide inrush current control and output voltage slew
rate control. Overcurrent fault protection is provided via
programmable   analog   foldback   current-limit   circuitry
equipped with a programmable overcurrent filter. These
protection circuits combine to limit the power dissipation of
the external MOSFET to insure that the MOSFET is in its
SOA during fault conditions.
The MIC2586 provides a circuit breaker function that
latches the output MOSFET off if the load current exceeds
the   current-limit   threshold   for   the   duration   of   the
programmable timer. Conversely, the MIC2586R will
attempt to restart power after a load current fault with a low
duty cycle to prevent the MOSFET from overheating.
Each device provides either an active-HIGH (1BM) or an
active-LOW (2BM) power-is-good (PWRGD) signal.
The MIC2586 and the MIC2586R provide up to three,
time-sequenced PWRGD outputs that can be used as a
control for DC/DC converter circuits or power modules.
Data sheets and support documentation can be found on
Micrels web site at: www.micrel.com
.
Features
" Operates from +10V to +80V with 100V ABS MAX
operation
" Industrial temperature specifications at V
CC
 = +24V and
V
CC
 = +48V
" Programmable current limit with analog foldback
" Active current regulation minimizes inrush current
" Electronic circuit breaker for overcurrent fault protection
" Output latch off (MIC2586) or output auto-retry
(MIC2586R)
" Fast responding circuit breaker (< 2祍) to short-circuit
loads
" Programmable input undervoltage lockout
" Fault Reporting:
Three open-drain PWRGD outputs for enabling DC/DC
converter(s)
 Active-HIGH: MIC2586-1/MIC2586R-1
 Active-LOW: MIC2586-2/MIC2586R-2
 
Applications
" General-purpose hot board insertion
" High-voltage, high-side electronic circuit breaker
" +12V/+24V/+48V distributed power systems
" +24V/+48V industrial/alarm systems
" Telecom systems
" Medical systems
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