TPS3890
- Power-On-Reset (POR) Generator with Adjustable Delay Time: 40 µs to 30 s
- Very Low Quiescent Current: 2.1 µA (Typical)
- High Threshold Accuracy: 1% (max)
- Precision Hysteresis
- Fixed and Adjustable Threshold Voltages:
- Fixed Thresholds for Standard Rails:
1.2 V to 3.3 V - Adjustable Down to 1.15 V
- Fixed Thresholds for Standard Rails:
- Manual Reset (MR) Input
- Open-Drain RESET Output
- Temperature Range: –40°C to +125°C
- Package: 1.5-mm × 1.5-mm WSON
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).
您可能會感興趣的類似產品
功能相同，但引腳輸出與所比較的裝置不同
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TPS3890 Low Quiescent Current, 1% Accurate Supervisor with Programmable Delay datasheet (Rev. A) | PDF | HTML | 2016年 5月 24日 |
| Circuit design | Auxiliary circuits for high-performance audio (Rev. A) | PDF | HTML | 2024年 9月 18日 | |
| Application note | Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) | 2020年 3月 17日 | ||
| E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 2019年 6月 28日 | ||
| Application brief | Latching a Voltage Supervisor (Reset IC) (Rev. A) | 2019年 4月 5日 | ||
| Application note | Comparing Voltage and Processor Monitoring Solutions | 2019年 4月 5日 | ||
| Application brief | Using The Manual Reset On Voltage Supervisors to Debounce a Pushbutton Switch | 2019年 3月 8日 | ||
| Application brief | Mitigating the Voltage Glitch on the Output of a Voltage Supervisor (Reset IC) D | 2018年 6月 27日 | ||
| Application note | How Comparator Topology Influences Propagation Delay | 2017年 4月 5日 | ||
| Technical article | Tips and tricks for optimizing your voltage supervisor | PDF | HTML | 2017年 3月 7日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
PSEMTHR24EVM-081 — 適用於 24 埠 IEEE 802.3bt 就緒 PSE 系統的主機板
PSEMTHR24EVM-081 是 TPS23881 和 TPS23882 PSE 控制器的基板。此電路板包含 24 組 2 對 / 4 對埠，可用於為 IEEE 802.3at 應用傳送高達 30W/埠的功率，以及為 IEEE 802.3bt 應用傳送高達 90W/埠的功率。
TPS3890EVM-775 — 具有可編程延遲的 TPS3890 低靜態電流、1% 準確度監控電路評估模組
TPS389033G Unencrypted PSpice Transient Model Package (Rev. A)
TPS389033K Unencrypted PSpice Transient Model Package (Rev. A)
TPS389050 Unencrypted PSpice Transient Model Package (Rev. A)
TPS389050G Unencrypted PSpice Transient Model Package (Rev. A)
TPS389050L Unencrypted PSpice Transient Model Package (Rev. A)
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
TIDA-050026-23881 — 適合多埠應用的 24 埠 (PoE 2、4 對) 電源設備參考設計
所需硬體清單
TIDA-050026-23882 — 適合多埠應用的 24 埠 (PoE 2、2 對) 電源設備參考設計；
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WSON (DSE) | 6 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點