LTC1153 - Auto-Reset Electronic Circuit Breaker


  • Programmable Trip Delay: 15µs to >100ms
  • Programmable Trip Current: 1mA to >20A
  • Programmbale Auto-Reset Time: 1ms to >10 sec.
  • 4.5V to 18V Supply Range
  • Drives Low RDS(ON) N-Channel MOSFETs
  • Status Output Indicates Fault Condition
  • Thermal Trip with PTC Thermistor
  • 8µA IQ in Standby Mode
  • No External Charge Pump Capacitors
  • Available in 8-Pin SOIC

Typical Application

LTC1153 Typical Application
LTC1153 Typical Application


The LTC1153 electronic circuit breaker drives a low cost N-channel MOSFET to interrupt power to a sensitive electronic load in the event of an over-current condition. The breaker remains tripped for a period of time set by an external timing capacitor and then is automatically reset. This cycle continues until the over-current condition is removed, protecting both the sensitive load and the MOSFET switch. The trip current, trip delay time and auto-reset period are programmable over a wide range to accommodate a variety of load impedances. An active high shut down input is also provided and interfaces directly to a PTC thermistor for thermal circuit breaking. An open-drain output is provided to report breaker status to the µP. TheLTC1153 is available in both 8-pin DIP and 8-pin SOIC packages.


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
LTC1153CN8#PBF N-8 N C 05-08-1510 (N8) Yes
LTC1153CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1153CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1153IN8#PBF N-8 N I 05-08-1510 (N8) Yes
LTC1153IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1153IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes

LTC1153 Package Drawing
LTC1153 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
LTC1153CN8#PBF N-8 C $2.50 $2.05 Yes
LTC1153CS8#PBF SO-8 C $2.65 $2.15 Yes
LTC1153CS8#TRPBF SO-8 C $2.21 Yes
LTC1153IN8#PBF N-8 I $2.95 $2.35 Yes
LTC1153IS8#PBF SO-8 I $3.20 $2.55 Yes
LTC1153IS8#TRPBF SO-8 I $2.61 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.

Click here to view our complete list of demo boards


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