LTC4210-2CS6#TRPBF

LTC4210-1/LTC4210-2 Hot Swap Controller in 6-Lead SOT-23 Package FEATURES DESCRIPTION Allows Safe Board Insertion and Removal from a Live Backplane nn Adjustable Analog Current Limit with Circuit Breaker nn Fast Response Limits Peak Fault Current nn Automatic Retry or Latch Off On Current Fault nn Adjustable Supply Voltage Power-Up Rate nn High Side Drive for External MOSFET Switch nn Controls Supply Voltages from 2.7V to 16.5V nn Undervoltage Lockout nn Adjustable Overvoltage Protection nn Low Profile (1mm) SOT-23 (ThinSOT™) Package The LTC®4210 is a 6-pin SOT-23 hot swap controller that allows a board to be safely inserted and removed from a live backplane. An internal high side switch driver controls the GATE of an external N-channel MOSFET for a supply voltage ranging from 2.7V to 16.5V. The LTC4210 provides the initial timing cycle and allows the GATE to be ramped up at an adjustable rate. nn The LTC4210 features a fast current limit loop providing active current limiting together with a circuit breaker timer. The signal at the ON pin turns the part on and off and is also used for the reset function. This part is available in two options: the LTC4210-1 for automatic retry on overcurrent fault and the LTC4210-2 for latch off on an overcurrent fault. APPLICATIONS Hot Board Insertion Electronic Circuit Breaker nn Industrial High Side Switch/Circuit Breaker nn 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 of their respective owners. nn TYPICAL APPLICATION Single Channel 5V Hot Swap Controller BACKPLANE PCB EDGE CONNECTOR CONNECTOR (FEMALE) (MALE) VIN 5V RSENSE 0.01Ω LONG Z1 OPTIONAL + RX 10Ω CX 0.1µF VCC SHORT RON1 20k ON RON2 10k Q1 Si4410DY SENSE GATE LTC4210 TIMER VOUT 5V 470µF 4A CLOAD Power-Up Sequence CLOAD = 470µF VON (2V/DIV) RG 100Ω VTIMER (1V/DIV) RC 100Ω CC 0.01µF VOUT (5V/DIV) GND GND LONG Z1: ISMA10A OR SMAJ10A IOUT (0.5A/DIV) CTIMER 0.22µF GND 4210 TA01 10ms/DIV 4210 TA02 421012fa For more information www.linear.com/LTC4210-1 1 LTC4210-1/LTC4210-2 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Supply Voltage (VCC).................................................17V Input Voltage (SENSE, TIMER).... – 0.3V to (VCC + 0.3V) Input Voltage (ON)...................................... –0.3V to 17V Output Voltage (GATE)........... Internally Limited (Note 3) Operating Temperature Range LTC4210-1C/LTC4210-2C.......................... 0°C to 70°C LTC4210-1I/LTC4210-2I........................–40°C to 85°C Storage Temperature Range................... –65°C to 150°C Lead Temperature (Soldering, 10 sec).................... 300°C ORDER INFORMATION TOP VIEW TIMER 1 GND 2 ON 3 6 VCC 5 SENSE 4 GATE S6 PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX = 125°C, θJA = 230°C/W http://www.linear.com/product/LTC4210-1#orderinfo Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4210-1CS6#TRMPBF LTC4210-1CS6#TRPBF LTYW 6-Lead Plastic TSOT-23 0°C to 70°C LTC4210-2CS6#TRMPBF LTC4210-2CS6#TRPBF LTYX 6-Lead Plastic TSOT-23 0°C to 70°C LTC4210-1IS6#TRMPBF LTC4210-1IS6#TRPBF LTF5 6-Lead Plastic TSOT-23 –40°C to 85°C LTC4210-2IS6#TRMPBF LTC4210-2IS6#TRPBF LTF6 6-Lead Plastic TSOT-23 TRM = 500 pieces. Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ –40°C to 85°C 421012fa 2 For more information www.linear.com/LTC4210-1 LTC4210-1/LTC4210-2 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, unless otherwise noted. (Note 2) SYMBOL PARAMETER VCC Supply Voltage l ICC VCC Supply Current l VLKOR VCC Undervoltage Lockout Release VLKOHYST VCC Undervoltage Lockout Hysteresis CONDITIONS MIN VCC Rising l TYP MAX UNITS 16.5 V 0.65 3.5 mA 2.5 2.65 2.7 2.2 100 V mV IINON ON Pin Input Current l –10 0 10 µA IINSENSE SENSE Pin Input Current VSENSE = VCC l –10 5 10 µA VCB Circuit Breaker Trip Voltage VCB = (VCC – VSENSE) l 44 50 56 mV IGATEUP GATE Pin Pull-Up Current VGATE = 0V l –5 –10 –15 IGATEDN GATE Pin Pull-Down Current VTIMER = 1.5V, VGATE = 3V or VON = 0V, VGATE = 3V or VCC – VSENSE = 100mV, VGATE = 3V ∆VGATE External N-Channel Gate Drive VGATE – VCC, VCC = 2.7V VGATE – VCC, VCC = 3V VGATE – VCC, VCC = 3.3V VGATE – VCC, VCC = 5V VGATE – VCC, VCC = 12V VGATE – VCC, VCC = 15V l l l l l l 4.0 4.5 5.0 10 9.0 6.0 6.5 7.5 8.5 12 12 11 8 10 12 16 16 18 V V V V V V ITIMERUP TIMER Pin Pull-Up Current Initial Cycle, VTIMER = 1V During Current Fault Condition, VTIMER = 1V l l –2 –25 –5 –60 –8.5 –100 µA µA ITIMERDN TIMER Pin Pull-Down Current After Current Fault Disappears, VTIMER = 1V Under Normal Conditions, VTIMER = 1V l 2 100 3.5 µA µA VTIMER TIMER Pin Threshold High Threshold, TIMER Rising Low Threshold, TIMER Falling l l 1.3 0.2 1.38 0.25 V V VTMRHYST TIMER Low Threshold Hysteresis VON ON Pin Threshold VONHYST ON Pin Threshold Hysteresis 25 1.22 0.15 100 ON Threshold, ON Rising tOFF(TMRHIGH) Turn-Off Time (TIMER Rise to GATE Fall) l 1.22 1.3 µA mA mV 1.38 V 80 mV VTIMER = 0V to 2V Step, VCC = VON = 5V 1 µs tOFF(ONLOW) Turn-Off Time (ON Fall to GATE Fall) VON = 5V to 0V Step, VCC = 5V 30 µs tOFF(VCCLOW) Turn-Off Time (VCC Fall to IC Reset) VCC = 5V to 2V Step, VON = 5V 30 µs Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to ground unless otherwise specified. Note 3: An internal Zener on the GATE pin clamps the charge pump voltage to a typical maximum voltage of 26V. External overdrive of the GATE pin beyond the internal Zener voltage may damage the device. Without a limiting resistor, the GATE capacitance must be