DESCRIPTION
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 shutdown 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.

FEATURES
■ 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

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