LTC4232 5A Integrated Hot Swap Controller Fea T Descrip T n Allows Safe Board Insertion into a Live Backplane The LTC 4232 is an integrated solution for Hot Swap n Small Footprint applications that allows a board to be safely inserted and n removed from a live backplane. The part integrates a Hot 33m MOSFET with R SENSE n Swap controller, power MOSFET and current sense resis- Wide Operating Voltage Range: 2.9V to 15V n tor in a single package for small form factor applications. Adjustable, 10% Accurate Current Limit n Current and Temperature Monitor Outputs The LTC4232 provides separate inrush current control n Overtemperature Protection and a 10% accurate 5A current limit with foldback cur- n Adjustable Current Limit Timer Before Fault rent limiting. The current limit threshold can be adjusted n Power Good and Fault Outputs dynamically using an external pin. Additional features n Adjustable Inrush Current Control include a current monitor output that amplifies the sense n 2% Accurate Undervoltage and Overvoltage Protection resistor voltage for ground referenced current sensing n Pin Compatible with LTC4217 (DFN Package Only) and a MOSFET temperature monitor output. Thermal limit, n Available in 16-Lead 5mm 3mm DFN Package overvoltage, undervoltage and power good monitoring are also provided. For a 2A pin compatible version, see LTC4217. a T The LTC4232-1 (separate data sheet) allows faster turn-on n RAID Systems, Solid State Drives than the LTC4232 by providing 16ms debounce delay and n Server I/O Cards external control of the GATE ramp rate. n Industrial L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical a T 12V, 5A Card Resident Application with Auto-Retry Power-Up Waveforms V OUT V OUT 12V 12V DD * V 5A IN + CONTACT 150k 10V/DIV 330F LTC4232DHC BOUNCE 107k UV FB I IN 20k 10k 0.1A/DIV FLT 5.23k V OUT OV GATE 10V/DIV 10k PG TIMER I SET PG 10V/DIV INTV I ADC MON CC 1F GND 4232 TA01b 20k 25ms/DIV 4232 TA01a *TVS: DIODES INC. SMAJI7A 4232fc 1 For more information www.linear.com/LTC4232 ion pplica ions pplica ion uresLTC4232 a Te Maxi Mu M r a T p c F T (Notes 1, 2) TOP VIEW Supply Voltage (V ) ................................. 0.3V to 28V DD Input Voltages V 1 16 V DD DD FB, OV, UV ..............................................0.3V to 12V UV 2 15 I SET TIMER ................................................... 0.3V to 3.5V OV 3 14 I MON SENSE .............................V 10V or 0.3V to V TIMER 4 13 FB 17 DD DD SENSE INTV 5 12 FLT Output Voltages CC GND 6 11 PG I , I ................................................. 0.3V to 3V SET MON OUT 7 10 GATE PG, FLT .................................................. 0.3V to 35V OUT 8 9 OUT OUT ............................................ 0.3V to V + 0.3V DD INTV .................................................. 0.3V to 3.5V DHC PACKAGE CC 16-LEAD (5mm 3mm) PLASTIC DFN GATE (Note 3) ........................................ 0.3V to 33V T = 125C, = 46C/W JMAX JA Operating Ambient Temperature Range EXPOSED PAD (PIN 17) IS SENSE, = 46C/W SOLDERED, OTHERWISE = 140C/W JA JA LTC4232C ................................................ 0C to 70C LTC4232I .............................................40C to 85C Junction Temperature (Notes 4, 5) ........................ 125C Storage Temperature Range .................. 65C to 150C o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4232CDHC PBF LTC4232CDHC TRPBF 4232 16-Lead (5mm 3mm) Plastic DFN 0C to 70C LTC4232IDHC PBF LTC4232IDHC TRPBF 4232 16-Lead (5mm 3mm) Plastic DFN 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: