LTC1153 - Auto-Reset Electronic Circuit Breaker
Datasheet 
DocumentationDatasheet
Spec Notice
Application Note
- AN53 - Micropower High Side MOSFET Drivers
- AN66 - Linear Technology Magazine Circuit Collection, Volume II
Design Note
Reliability Data
Product Selector Card
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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
Typical Application
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 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.N-8,SO-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC1153CN8#PBF | PDIP | 8 | C | $2.50 | $2.05 |
| LTC1153CS8#PBF | SO | 8 | C | $2.65 | $2.15 |
| LTC1153CS8#TRPBF | SO | 8 | C | $2.21 | |
| LTC1153IN8#PBF | PDIP | 8 | I | $2.95 | $2.35 |
| LTC1153IS8#PBF | SO | 8 | I | $3.20 | $2.55 |
| LTC1153IS8#TRPBF | SO | 8 | I | $2.61 | |
| LTC1153CN8 | PDIP | 8 | C | $5.00 | $4.10 |
| LTC1153CS8 | SO | 8 | C | $5.30 | $4.30 |
| LTC1153CS8#TR | SO | 8 | C | $4.42 | |
| LTC1153IN8 | PDIP | 8 | I | $5.90 | $4.70 |
| LTC1153IS8 | SO | 8 | I | $6.40 | $5.10 |
| LTC1153IS8#TR | SO | 8 | I | $5.22 |
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.