3 說明
TPS7A8300 是一款低噪聲 (6µVRMS),低壓降 (LDO) 穩壓器,能夠在壓降最大值只有 125mV 的情況下提供一個 2A 負載。
用戶完全可以通過印刷電路板 (PCB) 布局布線來調節 TPS7A8300 輸出電壓,而無需外部電阻器,從而減少元件總數量。 對于更高輸出電壓應用,此器件在使用外部電阻器的情況下可實現高達 5V 的輸出電壓。 借助于一個額外的偏置電壓軌,此器件支持極低輸出電壓(低至 1.1V)。
借助于極高精度(線路、負載和溫度范圍內達到 1%),遙感和可以減少涌入電流的軟啟動功能,TPS7A8300 非常適合為諸如高端微處理器和現場可編程門陣列 (FPGA) 等高電流、低電壓的器件供電。
TPS7A8300 針對高速通信應用中的加電噪聲敏感組件而設計。 極低噪聲,6-µVRMS器件輸出和高寬帶電源抑制比 (PSRR)(1MHz 時為
40dB)大大減少了高頻信號中的相位噪聲和時鐘抖動。 這些特性大大增加了計時器件、模數轉換器 (ADC) 和數模轉換器 (DAC) 的性能。
對于需要正向和負向低噪聲電源軌的應用,請考慮 TI 的TPS7A33負向高電壓、超低噪聲線性穩壓器系列產品。
| 部件號 |
封裝 |
封裝尺寸(標稱值) |
| TPS7A8300 |
超薄四方扁平無引線封裝 (VQFN) (20) |
5.00mm x 5.00mm |
| 超薄四方扁平無引線封裝 (VQFN) (20) |
3.50mm x 3.50mm |
- 如需了解所有可用封裝,請見數據表末尾的可訂購產品附錄。
4 修訂歷史記錄
Changes from D Revision (February 2013) to E Revision
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更改了格式以滿足最新數據表標準;添加了新的部分并移動了現有部分Go
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更改了第五個特性要點下的第一個分項 ANY-OUTGo
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更改了第八個特性要點:將軟啟動輸出和 PG 輸出拆成了兩個單獨的特性要點Go
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更改了說明部分中第二段的第一句。Go
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Changed RGW and RGR drawings: removed spacing between number and unit in pins 5 to 7 and 9 to 11 Go
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Changed first row of Pin Functions table: deleted spacing between number and unit in pin namesGo
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Added capacitor value to BIAS pin description in Pin Functions tableGo
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Changed 87% to 89% in the PG pin description of the Pin Functions tableGo
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Changed thermal pad description in Pin Functions tableGo
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Changed conditions statements for Absolute Maximum Ratings and Recommended Operating Conditions tables Go
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Added Recommended Operating Conditions tableGo
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Changed the Typical Characteristics section: changed all curve titles and conditions Go
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Changed title of Figure 11Go
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Added Overview section Go
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Changed second paragraph of Overview section: changed that can be groups, as follows to includingGo
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Changed functional block diagram footnoteGo
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Added Feature Description sectionGo
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Changed adjustable version to adjustable configuration in first paragraph of Adjustable Operation section Go
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Changed Figure 51: removed right-hand side diagramGo
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Added Figure 52Go
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Changed second sentence in Internal Charge Pump section Go
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Changed last sentence of UVLO sectionGo
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Changed oscillates to cycles in first paragraph of Thermal Protection sectionGo
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Changed first sentence of Programmable Soft-Start sectionGo
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Added Device Functional Modes sectionGo
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Added Application Information section Go
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Changed second paragraph of Noise sectionGo
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Added Typical Application section Go
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Added Figure 57Go
Changes from C Revision (July 2013) to D Revision
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Changed 將文檔狀態從混合狀態更改為生產數據Go
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Deleted 刪除了最后一個特性要點中第二個分項的腳注Go
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Deleted footnote from RGR package drawingGo
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Changed GND pin description in Pin Descriptions tableGo
Changes from B Revision (July 2013) to C Revision
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Deleted PG Functionality sectionGo
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Changed Power-Good sectionGo
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Changed text in Feed-Forward Capacitor subsectionGo
Changes from A Revision (June 2013) to B Revision
Changes from * Revision (May 2013) to A Revision