MIC2085/MIC2086
Single Channel Hot Swap Controllers
InfiniBand is a trademark of InfiniBand Trade Association
PowerPAK is a trademark of Vishay Intertechnology, Inc.
Micrel Inc. " 2180 Fortune Drive " San Jose, CA 95131 " USA " tel +1 (408) 944-0800 " fax + 1 (408) 474-1000 " http://www.micrel.com
May 2006
M9999-050406
(408) 955-1690
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
Micrels 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癈 to 85癈
" 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 (< 1祍)
" 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
" Cellular base stations
" LAN servers
" WAN servers
" InfiniBand" Systems
" Industrial high side switching
Typical Application
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