LTC4210-3/LTC4210-4 Hot Swap Controller in 6-Lead SOT-23 Package FEATURES DESCRIPTION n Allows Safe Board Insertion and Removal The LTC 4210-3/LTC4210-4 is a 6-pin SOT-23 Hot Swap fromaLive Backplane controller that allows a board to be safely inserted and n Adjustable Analog Current Limit removed from a live backplane. An internal high side withCircuitBreaker switch driver controls the GATE of an external N-channel n Fast Response Limits Peak Fault Current MOSFET for a supply voltage ranging from 2.7V to 7V. n Automatic Retry or Latch Off On Current Fault The LTC4210 provides the initial timing cycle and allows n Adjustable Supply Voltage Power-Up Rate the GATE to be ramped up at an adjustable rate. n High Side Drive for External MOSFET Switch The LTC4210 features a fast current limit loop providing n Controls Supply Voltages from 2.7V to 7V active current limiting together with a circuit breaker timer. n Undervoltage Lockout The signal at the ON pin turns the part on and off and is n Adjustable Overvoltage Protection also used for the reset function. n Low Profile (1mm) SOT-23 (ThinSOT) Package The LTC4210-3 autoretries on overcurrent fault and the LTC4210-4 latches off on an overcurrent fault. APPLICATIONS L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Analog Devices, Inc. All other trademarks are the property of their n Hot Board Insertion respective owners. n Electronic Circuit Breaker n Industrial High Side Switch/Circuit Breaker TYPICAL APPLICATION Single Channel 5V Hot Swap Controller BACKPLANE PCB EDGE CONNECTOR CONNECTOR Power-Up Sequence (FEMALE) (MALE) R Q1 SENSE 0.01 Si4410DY V OUT LONG V IN 5V C = 470F 5V LOAD + 4A V 10 ON 470F Z1 (2V/DIV) OPTIONAL 0.1F V 100 TIMER V SENSE CC (1V/DIV) GATE 20k SHORT 100 LTC4210-3 ON V OUT (5V/DIV) 0.01F 10k TIMER GND I OUT 0.22F (0.5A/DIV) LONG GND GND 4210 TA02b 10ms/DIV 4210 TA01a Z1: ISMA10A OR SMAJ10A 421034b 1 For more information www.linear.com/LTC4210-3LTC4210-3/LTC4210-4 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Supply Voltage (V ) ................................................17V CC TOP VIEW Input Voltage (SENSE, TIMER) .... 0.3V to (V + 0.3V) CC TIMER 1 6 V CC Input Voltage (ON) ..................................... 0.3V to 17V GND 2 5 SENSE Output Voltage (GATE) .......... Internally Limited (Note 3) ON 3 4 GATE Operating Temperature Range S6 PACKAGE LTC4210-3C/LTC4210-4C ........................ 0C to 70C 6-LEAD PLASTIC TSOT-23 T = 125C, = 230C/W JMAX JA LTC4210-3I/LTC4210-4I.......................40C to 85C Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec) ...................300C ORDER INFORMATION