MIC2585-2JYTS Microchip

MIC2584/2585 Micrel MIC2584/MIC2585 Dual-Channel Hot Swap Controller/Sequencer General Description Features The MIC2584 and MIC2585 are dual-channel positive volt- 1.0V to 13.2V supply voltage operation age hot swap controllers designed to facilitate the safe Surge voltage protection up to 20V insertion of boards into live system backplanes. The MIC2584 Current regulation limits inrush current regardless of and MIC2585 are available in 16-pin and 24-pin TSSOP load capacitance packages, respectively. Using a few external discrete com- Programmable inrush current limiting ponents and by controlling the gate drives of external N- Electronic circuit breaker Channel MOSFET devices, the MIC2584/85 provides inrush Dual-level overcurrent fault sensing eliminates false current limiting and output voltage slew rate control in harsh, tripping critical power supply environments. Additionally, the MIC2585 Fast response to short circuit conditions (< 1 s) provides output turn-on sequencing and output tracking Two sequenced output mode selections during turn-on and turn-off. In combination, the devices (MIC2585 only) many features provide a simplified, robust solution for many 250mV supply tracking mode during turn-on/turn-off network applications to meet the power sequencing and (MIC2585 only) protection requirements of multiple-voltage logic systems. Overvoltage and undervoltage output monitoring (Overvoltage for MIC2585 only) Undervoltage lockout protection /FAULT status output Power-On Reset and Power-Good status output (Power-Good for MIC2585 only) Applications RAID systems Network servers Base stations Network switches Hot-board insertion Ordering Information Part Number Output Sequencing Fast Circuit Breaker Package Standard Pb-Free Threshold MIC2584-xBTS MIC2584-xYTS N/A x = J, 100mV 16-pin TSSOP x = K, 150mV * MIC2585-1xBTSMIC2585-1xYTSOUT2 follows OUT1x = L, 200mV *24-pin TSSOP MIC2585-2xBTS MIC2585-2xYTS OUT1 follows OUT2 x = M, Off * * Contact Micrel for availability. Micrel, Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 MIC2584/2585 Micrel Typical Application Q1 BACKPLANE PCB EDGE R SENSE1 **BZX84Cxx Si7892DP CONNECTOR CONNECTOR 0.006 V V (PowerPAK SO-8) OUT1 CC1 12 12V 12V R1 34 C 6A LOAD1 10 330 F D1 C1 0.47 F R14 Q2 R 10.7k SENSE2 Si7892DP 1% 0.020 V (PowerPAK SO-8) OUT2 V CC2 12 3.3V 3.3V R2 1.5A 34 C LOAD2 10 330 F D2 C2 C3 0.47 F 0.01 F 12 24 23 R3 VCC2 SENSE2 VCC1 SENSE1 47k 3 R12 GATE2 105k R4 1% 22k 8 22 ON GATE1 R5 5 OUT2 22k R11 120 6 C4 DIS2 0.01 F 7 FB2 14 /FAULT /FAULT R15 MIC2585-1 Signal 4.42k 12 1% CDLY R6 18 FB1 *C5 130k 20 R13 0.047 F 1% R8 OUT1 14.7k R10 30.9k 1% 560 1% 21 19 OV1 DIS1 17 4 OV2 PG1 16 DOWNSTREAM R7 PG2 CONTROLLER(S) 13k 15 /POR 1% Downstream Control Signals R9 CPOR GND CFILTER TRK 8.06k 10 13 11 9 1% C6 C7 0.02 F 0.033 F GND Undervoltage (Output1) = 10.5V Undervoltage (Output2) = 2.95V Overvoltage (Input1) = 13.2V Overvoltage (Input2) = 3.65V START-UP Delay = 2.5ms POR Delay = 10ms Circuit Breaker Response Time = 16ms *C5 (optional) is used to set the delay for V with respect to V OUT2 OUT1 V Delay = 9.5ms OUT2 **D1 is BZX84C18 and D2 is BZX84C8V2 Resistor tolerances are 5% unless specified otherwise. Figure 1. Typical Application Circuit MIC2584/2585 2 March 2005