LTC4210-1 and -2 - Hot Swap Controller in 6-Lead SOT-23 Package


  • Allows Safe Board Insertion and Removal from a Live Backplane
  • Adjustable Analog Current Limit with Circuit Breaker
  • Fast Response Limits Peak Fault Current
  • Automatic Retry or Latch Off On Current Fault
  • Adjustable Supply Voltage Power-Up Rate
  • High Side Drive for External MOSFET Switch
  • Controls Supply Voltages from 2.7V to 16.5V
  • Undervoltage Lockout
  • Adjustable Overvoltage Protection
  • Low Profile (1mm) SOT-23 (ThinSOT™) Package

Typical Application

LTC4210-1 Typical Application
LTC4210-1 Typical Application


The LTC4210 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.

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.

  Vin Range Retry / Latchoff
LTC4210-1 2.7V to 16.5V Retry After Fault
LTC4210-2 2.7V to 16.5V Latch Off After Fault
LTC4210-3 2.7V to 7V Retry After Fault
LTC4210-4 2.7V to 7V Latch Off After Fault


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC4210-1CS6#PBF SOT-23 S6 C 05-08-1636 Yes
LTC4210-1CS6#TRMPBF SOT-23 S6 C 05-08-1636 Yes
LTC4210-1CS6#TRPBF SOT-23 S6 C 05-08-1636 Yes
LTC4210-1IS6#PBF SOT-23 S6 I 05-08-1636 Yes
LTC4210-1IS6#TRMPBF SOT-23 S6 I 05-08-1636 Yes
LTC4210-1IS6#TRPBF SOT-23 S6 I 05-08-1636 Yes
LTC4210-2CS6#PBF SOT-23 S6 C 05-08-1636 Yes
LTC4210-2CS6#TRMPBF SOT-23 S6 C 05-08-1636 Yes
LTC4210-2CS6#TRPBF SOT-23 S6 C 05-08-1636 Yes
LTC4210-2IS6#PBF SOT-23 S6 I 05-08-1636 Yes
LTC4210-2IS6#TRMPBF SOT-23 S6 I 05-08-1636 Yes
LTC4210-2IS6#TRPBF SOT-23 S6 I 05-08-1636 Yes

LTC4210-1 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC4210-1CS6#PBF SOT-23 C $2.06 Yes
LTC4210-1CS6#TRMPBF SOT-23 C $2.06 $1.73 Yes
LTC4210-1CS6#TRPBF SOT-23 C $2.06 $1.71 Yes
LTC4210-1IS6#PBF SOT-23 I $2.75 Yes
LTC4210-1IS6#TRMPBF SOT-23 I $2.75 $1.98 Yes
LTC4210-1IS6#TRPBF SOT-23 I $2.75 $1.96 Yes
LTC4210-2CS6#PBF SOT-23 C $2.39 Yes
LTC4210-2CS6#TRMPBF SOT-23 C $2.39 $1.73 Yes
LTC4210-2CS6#TRPBF SOT-23 C $2.39 $1.71 Yes
LTC4210-2IS6#PBF SOT-23 I $2.75 Yes
LTC4210-2IS6#TRMPBF SOT-23 I $2.75 $1.98 Yes
LTC4210-2IS6#TRPBF SOT-23 I $2.75 $1.96 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC628A LTC4210-1CS6 | Single Channel 5V Hot Swap Controller, Vin = +5V, Vout = 5V / 6A $50.00
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  • Hot Board Insertion
  • Electronic Circuit Breaker
  • Industrial High Side Switch/Circuit Breaker

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