This reference design highlights a versatile use case for a low-power reset IC and a watchdog timer. With less than 1-µA current consumption, the TPS3840 device can be configured to work either as a comparator (with simple 3-pin configuration) or as a universal power supply supervisor that can be daisychained as a sequencer. Additionally, the response and delay time can be configured using an external capacitor. For applications requiring a watchdog operation, the TPS3431 device, a stand-alone programmable watchdog timer with ±2.5% accuracy (typ) can be used.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Nano Power, Wide VIN (12 V max) Supervisor Reference Design | Dec. 19, 2018 | |
| Technical article | Improve circuit breaker leakage current response with a voltage supervisor | PDF | HTML | Jan. 10, 2019 |
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