LTC4218 Hot Swap Controller Features Description n Wide Operating Voltage Range: 2.9V to 26.5V The LTC 4218 is a Hot Swap controller that allows a board n Adjustable, 5% Accurate 15mV Current Limit to be safely inserted and removed from a live backplane. n Current Monitor Output An internal high side switch driver controls the gate of an n Adjustable Current Limit Timer Before Fault external N-channel MOSFET for supply voltages from 2.9V n Power Good and Fault Outputs to 26.5V. A dedicated 12V version (LTC4218-12) contains n Adjustable Inrush Current Control preset 12V specific thresholds, while the standard LTC4218 n 2% Accurate Undervoltage and Overvoltage allows adjustable thresholds. Protection The LTC4218 provides an accurate (5%) current limit with n Available in 16-Lead SSOP and 16-Pin 5mm 3mm current foldback limiting. The current limit threshold can DFN Packages be adjusted dynamically using an external pin. Additional features include a current monitor output that amplifies the sense voltage for ground referenced current sensing. a Overvoltage, undervoltage and power good monitoring n RAID Systems are also provided. n ATCA, AMC, TCA Systems L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n Technology Corporation. All other trademarks are the property of their respective owners. Server I/O Cards n Industrial t ypical a 12V, 6A Card Resident Application Power-Up Waveform V 2m Si7108DN OUT 12V 12V V IN CONTACT BOUNCE 6A + 10V/DIV * 330F 10 I IN 1A/DIV SENSE GATE SOURCE 1k V OUT 10V/DIV + SENSE 0.01F V DD PG OV LTC4218DHC-12 10k 10V/DIV UV AUTO RETRY PG FLT 4218 TA01b 25ms/DIV I TIMER SET 0.1F INTV I ADC CC MON 20k GND 1F 2V = 7.5A 4218 TA01a *TVS: DIODES INC SMAJ17A 4218fh 1 For more information www.linear.com/LTC4218 pplication pplicationsLTC4218 a bsolute Maxi Mu M r (Notes 1, 2) Supply Voltage (V ) ................................. 0.3V to 35V Operating Ambient Temperature Range DD Input Voltages LTC4218C ................................................ 0C to 70C FB, OV, UV ............................................. 0.3V to 12V LTC4218I .............................................40C to 85C TIMER ................................................... 0.3V to 3.5V Storage Temperature Range ..................65C to 150C SENSE .............................V 10V or 0.3V to V Lead Temperature (Soldering, 10 sec) DD DD + SENSE .............................V 10V or 0.3V to V GN Package Only ..............................................300C DD DD SOURCE ........................................ 5V to V + 0.3V DD Output Voltages I , I ................................................. 0.3V to 3V SET MON PG, FLT .................................................. 0.3V to 35V INTV .................................................. 0.3V to 3.5V CC GATE (Note 3) ........................................ 0.3V to 35V p in c F TOP VIEW TOP VIEW + NC 1 16 SENSE + NC 1 16 SENSE V 2 15 SENSE DD V 2 15 SENSE DD UV 3 14 I SET UV 3 14 I SET OV 4 13 I MON OV 4 13 I MON 17 TIMER 5 12 FB TIMER 5 12 FB INTV 6 11 FLT CC INTV 6 11 FLT CC GND 7 10 PG GND 7 10 PG SOURCE 8 9 GATE SOURCE 8 9 GATE DHC PACKAGE GN PACKAGE 16-LEAD (5mm 3mm) PLASTIC DFN 16-LEAD PLASTIC SSOP T = 125C, = 43C/W JMAX JA T = 150C, = 135C/W JMAX JA EXPOSED PAD (PIN 17) IS SUBSTRATE GND o r Der i n F M (