LTC4223-1/LTC4223-2 Dual Supply Hot Swap Controller for Advanced Mezzanine Card FEATURES DESCRIPTION TM Allows Safe Insertion into Live AMC or MicroTCA The LTC 4223 positive voltage Hot Swap controller Backplane allows a board to be safely inserted and removed from Controls 12V Main and 3.3V Auxiliary Supplies a live AMC or MicroTCA backplane. It controls the main Limits Peak Fault Current in 1s 12V supply with an external N-channel MOSFET and the Adjustable Current Limit with Circuit Breaker 3.3V auxiliary supply with an integrated switch. The 12V Integrated 0.3 AUX Switch output ramp rate is adjustable and includes inrush current High Side Current Sense limiting. The 12V output is also protected against short Gate Drive for External N-Channel MOSFET circuit faults with a fast acting current limit and a 5% Adjustable Response Time for Overcurrent Protection accurate timed circuit breaker. The 3.3V output includes Adjustable Supply Voltage Power-Up Rate both soft start and overcurrent protection. Thermal Shutdown Protection The LTC4223 features a current monitor output for the LTC4223-1: Latch Off After Fault 12V supply, and reports fault and power-good status for LTC4223-2: Automatic Retry After Fault both supplies. It also detects card presence and allows 16-Lead SSOP and 5mm 4mm DFN Packages independent control of the 12V and auxiliary 3.3V sup- ply outputs. The LTC4223-1 features a latch-off circuit APPLICATIONS breaker, while the LTC4223-2 provides automatic retry Advanced Mezzanine Card, MicroTCA Systems after a fault. Workstations and Server I/O , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Telecom Networks TYPICAL APPLICATION Advanced Mezzanine Card Application Normal Power-Up Waveform 6m Si7336ADP 12V EN 12V 7.4A 5V/DIV AUXOUT 15nF 10 5V/DIV 47 12V 12V 12V 12V 12V IN SENSE GATE OUT OUT 5V/DIV 3.3V 3.3V AUXIN AUXOUT 150mA 51 AUXPGOOD 5V/DIV V CC 12PGOOD 330nF 5V/DIV LTC4223-1/LTC4223-2 AUXON 12ON AUXPGOOD 20ms/DIV 422312 TA01b 12PGOOD FAULT IPMC 12IMON ADC EN GND TIMER 422312 TA01a 0.1F CARRIER MODULE CONNECTOR CONNECTOR 422312f 1LTC4223-1/LTC4223-2 ABSOLUTE MAXIMUM RATINGS (Note 1) 12V ................................................. 0.3V to 25V GATE Supply Voltages 12V - 12V (Note 3) ................... 4.5V to 0.3V OUT GATE 12V ..................................................... 0.3V to 20V IN AUXOUT ................................................. 0.3V to 10V AUXIN .................................................... 0.3V to 10V Operating Temperature Range V ........................................................... 0.3V to 7V CC LTC4223-1C/ LTC4223-2C ....................... 0C to 70C Input Voltages LTC4223-1I/ LTC4223-2I ..................... 40C to 85C 12ON, AUXON, EN ................................... 0.3V to 7V Storage Temperature Range TIMER ..........................................0.3V to V + 0.3V CC GN Package ....................................... 65C to 150C 12V ............................................... 0.3V to 20V SENSE DHD Package ..................................... 65C to 125C Output Voltages Lead Temperature (Soldering, 10sec) FAULT, 12PGOOD, AUXPGOOD, GN Package ......................................................300C 12IMON ................................................... 0.3V to 7V PIN CONFIGURATION TOP VIEW TOP VIEW 12V 1 16 12V SENSE GATE 12V 1 16 12V SENSE GATE 12V 2 15 12V IN OUT 12V 2 15 12V IN OUT 12IMON 3 14 12PGOOD 12IMON 3 14 12PGOOD 12ON 4 13 FAULT 17 12ON 4 13 FAULT AUXIN 5 12 AUXOUT AUXIN 5 12 AUXOUT V 6 11 AUXPGOOD CC V 6 11 AUXPGOOD CC AUXON 7 10 EN AUXON 7 10 EN GND 8 9 TIMER GND 8 9 TIMER DHD PACKAGE GN PACKAGE 16-LEAD (5mm 4mm) PLASTIC DFN 16-LEAD PLASTIC SSOP EXPOSED PAD (PIN 17) PCB GND CONNECTION OPTIONAL T = 125C, = 110C/W JMAX JA MUST BE SOLDERED TO PCB TO OBTAIN = 43C/W, OTHERWISE = 140C/W, T = 125C JA JA JMAX ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4223CDHD-1 PBF LTC4223CDHD-1 TRPBF 42231 16-Lead (5mm 4mm) Plastic DFN 0C to 70C LTC4223CDHD-2 PBF LTC4223CDHD-2 TRPBF 42232 16-Lead (5mm 4mm) Plastic DFN 0C to 70C LTC4223IDHD-1 PBF LTC4223IDHD-1 TRPBF 42231 16-Lead (5mm 4mm) Plastic DFN 40C to 85C LTC4223IDHD-2 PBF LTC4223IDHD-2 TRPBF 42232 16-Lead (5mm 4mm) Plastic DFN 40C to 85C LTC4223CGN-1 PBF LTC4223CGN-1 TRPBF 42231 16-Lead Plastic SSOP 0C to 70C LTC4223CGN-2 PBF LTC4223CGN-2 TRPBF 42232 16-Lead Plastic SSOP 0C to 70C LTC4223IGN-1 PBF LTC4223IGN-1 TRPBF 4223I1 16-Lead Plastic SSOP 40C to 85C LTC4223IGN-2 PBF LTC4223IGN-2 TRPBF 4223I2 16-Lead Plastic SSOP 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *The temperature grade is identi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: