MIC2586/MIC2586R
Single-Channel, Positive High-Voltage
Hot Swap Controller/Sequencer
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” signal. The MIC2586 and the MIC2586R provide up
to three, time-sequenced "Power-is-Good" 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
Micrel’s web site at
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 (< 2µs) to short circuit
loads
•
Programmable input undervoltage lockout
•
Fault Reporting:
Three Open-drain “Power-is-Good” 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
________________________________________________________________________________________________________________
Ordering Information
Part Number
Standard
MIC2586-1BM
MIC2586-2BM
MIC2586R-1BM
MIC2586R-2BM
Pb-Free
MIC2586-1YM
MIC2586-2YM
MIC2586R-1YM
MIC2586R-2YM
Active-HIGH
Active-LOW
Active- HIGH
Active-LOW
Latched
Latched
Auto-retry
Auto-retry
14 pin SOIC
14 pin SOIC
14 pin SOIC
14 pin SOIC
PWRGD Polarity
Circuit Breaker Function
Package
________________________________________________________________________________________________________________
Power, Connect and Protect is a trademark of Micrel, 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
October 2004
1
M9999-102204
(408) 955-1690
MICREL [ MICREL SEMICONDUCTOR ]
