LTC4215/LTC4215-2 Hot Swap Controller with 2 I C Compatible Monitoring FEATURES DESCRIPTION n Allows Safe Insertion into Live Backplane The LTC 4215/LTC4215-2 Hot Swap controllers allow n 8-Bit ADC Monitors Current and Voltage a board to be safely inserted and removed from a live 2 n I C/SMBus Interface backplane. Using an external N-channel pass transistor, n Wide Operating Voltage Range: 2.9V to 15V board supply voltage and inrush current are ramped up at 2 n 20s (LTC4215) or 420s (LTC4215-2) Circuit an adjustable rate. An I C interface and onboard ADC allow Breaker Timeout for monitoring of load current, voltage and fault status. n dI/dt Controlled Soft-Start The device features adjustable foldback current limit and n High Side Drive for External N-Channel MOSFET a soft-start pin that sets the dI/dt of the inrush current. n No External Gate Capacitor Required 2 An I C interface may con gure the part to latch off or n Input Overvoltage/Undervoltage Protection automatically restart after the LTC4215 detects a current n Optional Latchoff or Auto-Retry After Faults limit fault. n Alerts Host After Faults n The controller has additional features to interrupt the host Inrush Current Limit with Foldback n when a fault has occurred, notify when output power is Available in 24-Pin (4mm 5mm) QFN Package n good, detect insertion of a load card, and power-up either LTC4215 also available in 16-Lead Narrow SSOP 2 automatically upon insertion or wait for an I C command Package to turn on. APPLICATIONS The LTC4215 has a 20s circuit breaker lter for applica- tions that require a fast fault response time and it defaults n Live Board Insertion to latchoff after an overcurrent fault. The LTC4215-2 has n Electronic Circuit Breakers an extended 420s circuit breaker lter for applications n Computers, Servers where supply transients may exceed 20s and it defaults n Platform Management to restart automatically after an overcurrent fault. L, LT, LTC, LTM, Linear Technology, the Linear logo and Hot Swap are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patent including 7330065. TYPICAL APPLICATION 12V Application with 5A Circuit Breaker Start-Up Waveform 0.005 FDC653N V OUT 12V 12V + V DD 10V/DIV C L 34.8k 30.1k 0.1F 10 CONTACT BOUNCE 1.18k 3.57k INRUSH P6KE16A CURRENT + UV V SENSE SENSE GATE SOURCE DD 2.5A/DIV 3.4k OV FB SDAO V OUT INTV EN CC SDAI 10V/DIV SDA LTC4215UFD SCL SCL ADIN 24k V GPIO ALERT ALERT (POWERGOOD) INTV CC GPIO 10V/DIV INTV CC ON TIMER SS GND 42151 TA01b 68nF C = 12000F 50ms/DIV L 0.1F GND 4215 TA01a BACKPLANE PLUG-IN CARD 4215fe 1 CONNECTOR 2 CONNECTOR 1LTC4215/LTC4215-2 (Notes 1, 2) ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) ................................ 0.3V to 24V Output Voltages DD Supply Voltage (INTV ) .......................... 0.3V to 6.5V GATE, GPIO ............................................ 0.3V to 24V CC Input Voltages Operating Temperature Range GATE-SOURCE (Note 3) .......................... 0.3V to 5V LTC4215C ................................................ 0C to 70C + SENSE , SENSE ................ V 0.3V to V + 0.3V LTC4215I.............................................. 40C to 85C DD DD SOURCE .................................................... 5V to 24V Storage Temperature Range EN, FB, ON, OV, UV ................................ 0.3V to 12V SSOP ................................................. 65C to 150C ADR0, ADR1, ADR2, TIMER, QFN .................................................... 65C to 125C ADIN, SS ................................ 0.3V to INTV + 0.3V Lead Temperature (Soldering, 10 sec) CC ALERT SCL, SDA, SDAI, SDAO ............. 0.3V to 6.5V SSOP ................................................................300C PIN CONFIGURATION LTC4215 LTC4215/LTC4215-2 TOP VIEW TOP VIEW 24 23 22 21 20 SENSE 1 16 GATE UV 1 19 FB V 2 15 SOURCE DD OV 2 18 GPIO UV 3 14 FB SS 3 17 INTV CC 25 SS 4 13 GPIO GND 4 16 TIMER ON 5 15 ADIN GND 5 12 INTV CC EN 6 14 ADR2 6 ON 11 TIMER SDAO 7 13 ADR1 SDA 7 10 ADR0 8 9 10 11 12 SCL 8 9 ALERT GN PACKAGE 16-LEAD PLASTIC SSOP UFD PACKAGE 24-LEAD (4mm s 5mm) PLASTIC QFN T = 125C, = 130C/W JMAX JA T = 125C, = 43C/W JMAX JA EXPOSED PAD (PIN 25) NOT GUARANTEED LOW IMPEDANCE TO GND, ELECTRICAL CONNECTION OPTIONAL ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4215CGN PBF LTC4215CGN TRPBF 4215 16-Lead Plastic TSSOP 0C to 70C LTC4215IGN PBF LTC4215IGN TRPBF 4215I 16-Lead Plastic TSSOP 40C to 85C LTC4215CUFD PBF LTC4215CUFD TRPBF 4215 0C to 70C 24-Lead (4mm 5mm) Plastic QFN LTC4215IUFD PBF LTC4215IUFD TRPBF 4215 40C to 85C 24-Lead (4mm 5mm) Plastic QFN LTC4215CUFD-2 PBF LTC4215CUFD-2 TRPBF 42152 24-Lead (4mm 5mm) Plastic QFN 0C to 70C LTC4215IUFD-2 PBF LTC4215IUFD-2 TRPBF 42152 24-Lead (4mm 5mm) Plastic QFN 40C to 85C 4215fe 2 SDAI V DD + SCL SENSE ALERT SENSE NC GATE ADR0 SOURCE