MIC2589-2YM Microchip

MIC2589/MIC2595 Single-Channel, Negative High-Voltage Hot Swap Power Controller/Sequencer General Description Features The MIC2589 and MIC2595 are single-channel, Provides safe insertion and removal from live 48V negative voltage hot swap controllers designed to (nominal) backplanes address the need for safe insertion and removal of Operates from 19V to 80V circuit boards into live system backplanes, while using Fast responding circuit breaker (<1s) to short circuit few external components. The MIC2589/MIC2589R and conditions the MIC2595/MIC2595R are each available in 14-pin User-programmable overcurrent detector response SOIC packaging and work in conjunction with an time external N-Channel MOSFET for which the gate drive is controlled to provide inrush current limiting and output Electronic circuit breaker function: voltage slew-rate control. Overcurrent fault protection is Output latch OFF (MIC2589/MIC2595) also provided via a programmable overcurrent threshold Output auto-retry (MIC2589R/MIC2595R) and filter. Very fast fault response is provided to ensure Active current regulation to control inrush currents that system power supplies maintain regulation even Programmable undervoltage and overvoltage during output short circuits. These controllers offer two lockouts (MIC2589/MIC2589R) responses to a circuit breaker fault condition: the MIC2589 and MIC2595 latch the circuit breakers output Programmable UVLO hysteresis off when the overcurrent threshold interval is exceeded (MIC2595/MIC2595R) and the overcurrent filter times out while the MIC2589R Staggered Power-Good output signals provide load and MIC2595R automatically attempt to restart at a fixed sequencing duty cycle after a current limit fault. A primary Power- Active-HIGH (-1) Good signal and two secondary (delayed and Active-LOW (-2) staggered) Power-Good signals are provided to indicate that the output voltage is within its valid operating range. Applications These signals can be used to perform an all-at-once or Central office switching a sequenced enabling of one or more DC-DC power 48V power distribution modules. Distributed power systems All support documentation can be found on Micrels web AdvancedTCA site at www.micrel.com. Ordering Information Part Number PWRGD Circuit Breaker Standard Pb-Free Polarity Lockout Functions Function Package MIC2589-1BM MIC2589-1YM Active-High Programmable UVLO & OVLO Latched Off 14-Pin SOIC MIC2589-2BM MIC2589-2YM Active-Low Programmable UVLO & OVLO Latched Off 14-Pin SOIC MIC2589R-1BM MIC2589R-1YM Active-High Programmable UVLO & OVLO Auto Retry 14-Pin SOIC MIC2589R-2BM MIC2589R-2YM Active-Low Programmable UVLO & OVLO Auto Retry 14-Pin SOIC MIC2595-1BM MIC2595-1YM Active-High Programmable UVLO Hysteresis Latched Off 14-Pin SOIC MIC2595-2BM MIC2595-2YM Active-Low Programmable UVLO Hysteresis Latched Off 14-Pin SOIC MIC2595R-1BM MIC2595R-1YM Active-High Programmable UVLO Hysteresis Auto Retry 14-Pin SOIC MIC2595R-2BM MIC2595R-2YM Active-Low Programmable UVLO Hysteresis Auto Retry 14-Pin SOIC Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel MIC2589/MIC2595 Typical Applications -48V RTN -48V RTN (Long Pin) MIC2589-2BM *D1 114 SMAT70A /PWRGD1 VDD IN+ OUT+ +5V OUT R1 R2 C4 C TIMER C3 689k 11.8k 100F ON/OFF* 0.068F 2 13 PGTIMER /PWRGD3 0.1F 1% 1% -48V RTN IN OUT +5V RTN (Short Pin) 3 12 UV /PWRGD2 4 11 OV DRAIN C FILTER C1 2.2F 5 10 IN+ OUT+ +2.5V OUT 0.47F CFILTER GATE C6 C5 ON/OFF* R3 6 9 100F 0.1F CNLD SENSE 12.4k C NLD IN OUT +2.5V RTN 1% 0.068F *C2 7 8 VEE N/C 0.1F R4 10 IN+ OUT+ +1.8V OUT C8 C7 ON/OFF* 100F 0.1F -48V RTN IN OUT +1.8V RTN R M1 (Long Pin) SENSE 0.01 SUM110N10-09 5% Nominal Undervoltage and Overvoltage Thresholds: V =36.5V UV V =71.2V OV Overcurrent TImer Delay ~ t =30ms FLT *Optional components (See Funtional Description and Applications Information for more details) An external pull-up resistor for the power-good signal is necessary for DC-DC convertors (and all other load modules) not equipped with an internal pull-up impedance 2 M9999-120505 December 2005 (408) 955-1690