MIC2586/2586R Single-Channel, Positive High-Voltage Hot Swap Controller/Sequencer - Micrel - #1

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MIC2586/MIC2586R Single-Channel, Positive High-Voltage Hot Swap Controller/Sequencer 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 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 www.micrel.com. Features • Operates from +10V to +80V with 100V ABS MAX operation • Industrial temperature specifications at VCC = +24V and VCC = +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 (< 2ìs) 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 Pb-Free PWRGD Polarity Circuit Breaker Function Package MIC2586-1BM MIC2586-1YM Active-HIGH Latched 14 pin SOIC MIC2586-2BM MIC2586-2YM Active-LOW Latched 14 pin SOIC MIC2586R-1BM MIC2586R-1YM Active- HIGH Auto-retry 14 pin SOIC MIC2586R-2BM MIC2586R-2YM Active-LOW Auto-retry 14 pin SOIC ________________________________________________________________________________________________________________