The TPS3890-Q1 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-Q1 family uses a precision reference to achieve 1% threshold accuracy. The reset delay time can be user-adjusted between 25 µs and 30 s by connecting the CT pin to an external capacitor. The TPS3890-Q1 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).
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| Threshold Voltage 1 (Typ) (V) |
| # of Supplies Monitored |
| VCC (Max) (V) |
| VCC (Min) (V) |
| Output Driver Type / Reset Output |
| Time Delay (ms) |
| Features |
| Rating |
| Operating Temperature Range (C) |
| Watchdog Timer WDI (sec) |
| TPS3890-Q1 | TPS3808-Q1 |
|---|---|
|
Adjustable 1.15 1.44 1.73 2.4 2.89 2.93 3.066 3.17 4.4 4.65 4.8 |
Adjustable 1.12 1.16 1.4 1.67 2.79 3.07 4.65 |
| 1 | 1 |
| 5.5 | 6.5 |
| 1.5 | 1.8 |
|
Active-low Open-drain |
Active-low Open-drain |
| Programmable | Programmable |
|
Active Low Enable Manual Reset |
Active Low Enable Manual Reset |
| Automotive | Automotive |
| -40 to 125 | -40 to 125 |
| None | None |
| Order Now | Order Now |
| Version | Part Number | Definition |
|---|---|---|
| Catalog | TPS3890 | TI's standard catalog product |
