Features and Benefits

  • 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

Product Details

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.

The LTC1153 is available in both 8-pin DIP and 8-pin SOIC packages.


  • Power Bus Circuit Breaker
  • SCSI Termination Power Protection
  • Regulator Over-Current Protection
  • Battery Short-Circuit Protection
  • DC Motor Stall Protection
  • Sensitive System Power Interrupt

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations


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Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

Sample & Buy

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