The TPS3890 is a precision voltage supervisor with low-quiescent current that monitors system voltages as low as 1.15 V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3890 family uses a precision reference to achieve 1% threshold accuracy. The reset delay time can be user-adjusted between 40 µs and 30 s by connecting the CT pin to an external capacitor. The TPS3890 has a very low quiescent current of 2.1 µA and is available in a small 1.5-mm × 1.5-mm package, making the device well-suited for battery-powered and space-constrained applications. The device is fully specified over a temperature range of –40°C to +125°C (TJ).
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS3890 Low Quiescent Current, 1% Accurate Supervisor with Programmable Delay datasheet (Rev. A) | PDF | HTML | 24 May 2016 |
| Circuit design | Auxiliary circuits for high-performance audio (Rev. A) | PDF | HTML | 18 Sep 2024 | |
| Application note | Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) | 17 Mar 2020 | ||
| E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 28 Jun 2019 | ||
| Application brief | Latching a Voltage Supervisor (Reset IC) (Rev. A) | 05 Apr 2019 | ||
| Application note | Comparing Voltage and Processor Monitoring Solutions | 05 Apr 2019 | ||
| Application brief | Using The Manual Reset On Voltage Supervisors to Debounce a Pushbutton Switch | 08 Mar 2019 | ||
| Application brief | Mitigating the Voltage Glitch on the Output of a Voltage Supervisor (Reset IC) D | 27 Jun 2018 | ||
| Application note | How Comparator Topology Influences Propagation Delay | 05 Apr 2017 | ||
| Technical article | Tips and tricks for optimizing your voltage supervisor | PDF | HTML | 07 Mar 2017 |
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PSEMTHR24EVM-081 is the base board for the TPS23881 and TPS23882 PSE controllers. This board contains 24 2-Pair / 4-Pair ports that can that can be used to send up to 30W/port for IEEE 802.3at applications and up to 90W/port for IEEE 802.3bt applications.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WSON (DSE) | 6 | Ultra Librarian |
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