3 說(shuō)明
TPS7A8300 是一款低噪聲 (6µVRMS),低壓降 (LDO) 穩(wěn)壓器,能夠在壓降最大值只有 125mV 的情況下提供一個(gè) 2A 負(fù)載。
用戶完全可以通過(guò)印刷電路板 (PCB) 布局布線來(lái)調(diào)節(jié) TPS7A8300 輸出電壓,而無(wú)需外部電阻器,從而減少元件總數(shù)量。 對(duì)于更高輸出電壓應(yīng)用,此器件在使用外部電阻器的情況下可實(shí)現(xiàn)高達(dá) 5V 的輸出電壓。 借助于一個(gè)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(fù)載和溫度范圍內(nèi)達(dá)到 1%),遙感和可以減少涌入電流的軟啟動(dòng)功能,TPS7A8300 非常適合為諸如高端微處理器和現(xiàn)場(chǎng)可編程門陣列 (FPGA) 等高電流、低電壓的器件供電。
TPS7A8300 針對(duì)高速通信應(yīng)用中的加電噪聲敏感組件而設(shè)計(jì)。 極低噪聲,6-µVRMS器件輸出和高寬帶電源抑制比 (PSRR)(1MHz 時(shí)為
40dB)大大減少了高頻信號(hào)中的相位噪聲和時(shí)鐘抖動(dòng)。 這些特性大大增加了計(jì)時(shí)器件、模數(shù)轉(zhuǎn)換器 (ADC) 和數(shù)模轉(zhuǎn)換器 (DAC) 的性能。
對(duì)于需要正向和負(fù)向低噪聲電源軌的應(yīng)用,請(qǐng)考慮 TI 的TPS7A33負(fù)向高電壓、超低噪聲線性穩(wěn)壓器系列產(chǎn)品。
| 部件號(hào) |
封裝 |
封裝尺寸(標(biāo)稱值) |
| TPS7A8300 |
超薄四方扁平無(wú)引線封裝 (VQFN) (20) |
5.00mm x 5.00mm |
| 超薄四方扁平無(wú)引線封裝 (VQFN) (20) |
3.50mm x 3.50mm |
- 如需了解所有可用封裝,請(qǐng)見(jiàn)數(shù)據(jù)表末尾的可訂購(gòu)產(chǎn)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(shù)據(jù)表標(biāo)準(zhǔn);添加了新的部分并移動(dòng)了現(xiàn)有部分Go
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更改了第五個(gè)特性要點(diǎn)下的第一個(gè)分項(xiàng) ANY-OUTGo
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更改了第八個(gè)特性要點(diǎn):將軟啟動(dòng)輸出和 PG 輸出拆成了兩個(gè)單獨(dú)的特性要點(diǎn)Go
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更改了說(shuō)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(tài)從混合狀態(tài)更改為生產(chǎn)數(shù)據(jù)Go
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Deleted 刪除了最后一個(gè)特性要點(diǎn)中第二個(gè)分項(xiàng)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
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從產(chǎn)品預(yù)覽更改為生產(chǎn)數(shù)據(jù)(混合狀態(tài))Go
Changes from * Revision (May 2013) to A Revision
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更改了產(chǎn)品預(yù)覽數(shù)據(jù)表Go