LTC4210-1/LTC4210-2 Hot Swap Controller in 6-Lead SOT-23 Package FEATURES DESCRIPTION n Allows Safe Board Insertion and Removal The LTC 4210 is a 6-pin SOT-23 hot swap controller that from a Live Backplane allows a board to be safely inserted and removed from a n Adjustable Analog Current Limit live backplane. An internal high side switch driver controls with Circuit Breaker the GATE of an external N-channel MOSFET for a supply n Fast Response Limits Peak Fault Current voltage ranging from 2.7V to 16.5V. The LTC4210 provides n Automatic Retry or Latch Off On Current Fault the initial timing cycle and allows the GATE to be ramped n Adjustable Supply Voltage Power-Up Rate 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 16.5V 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 This part is available in two options: the LTC4210-1 for automatic retry on overcurrent fault and the LTC4210-2 APPLICATIONS for latch off on an overcurrent fault. n Hot Board Insertion L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property n Electronic Circuit Breaker of their respective owners. n Industrial High Side Switch/Circuit Breaker TYPICAL APPLICATION Single Channel 5V Hot Swap Controller BACKPLANE PCB EDGE CONNECTOR CONNECTOR (FEMALE) (MALE) R Q1 SENSE Power-Up Sequence 0.01 Si4410DY V OUT LONG V IN 5V 5V + C = 470F LOAD 4A R 470F X V Z1 ON 10 C LOAD (2V/DIV) OPTIONAL C X 0.1F R G V V SENSE 100 TIMER CC (1V/DIV) GATE R ON1 R 20k C SHORT LTC4210 100 ON V C OUT C R ON2 (5V/DIV) 0.01F 10k TIMER GND I C OUT TIMER 0.22F (0.5A/DIV) LONG GND GND 4210 TA02 4210 TA01 10ms/DIV Z1: ISMA10A OR SMAJ10A 421012fa 1 For more information www.linear.com/LTC4210-1LTC4210-1/LTC4210-2 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 LTC4210-1C/LTC4210-2C ......................... 0C to 70C 6-LEAD PLASTIC TSOT-23 T = 125C, = 230C/W JMAX JA LTC4210-1I/LTC4210-2I .......................40C to 85C Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec) ...................300C