PDF《TPS74401 具有可编程软启动功能的 3.0A Ultra-LDO》

25 10.4 Thermal Considerations.26

11 器 器件 件和 和文 文档 档支 支持 持29 11.1 器件支持.29 11.2 文档支持

29 11.3 接收文档更新通知

29 11.4 社区资源.29 11.5 商标.29 11.6 静电放电警告.29 11.7 Glossary.29

12 机 机械 械、 、封 封装 装和 和可 可订 订购 购信 信息 息.30

4 修 修订 订历 历史 史记 记录 录注:之前版本的页码可能与当前版本有所不同. Changes from Revision Q (April 2015) to Revision R Page ? 已添加 在文档中增加了 RGR 封装

1 ? 已更改 通篇将 TPS744xx 更改为 TPS74401.1 ? 已更改 封装 特性 要点

1 ? 已更改 对 说明 部分的第二段进行了更改:增加了 RGR 封装,更改了第二句到最后一句.1 ? 已删除 典型应用电路方框图的固定电压版本

1 ? Added RGR package to Pin Configuration and Functions section

5 ? Changed FB/SNS to FB in both pin out drawings, deleted TPS744xx from VQFN package

5 ? Changed Surface Mount to Top View in KTW pin out drawing.5 ? Changed input capacitor to bias capacitor in BIAS pin description

5 ? Deleted (adjustable version only) from description of FB pin in Pin Functions table

5 ? Changed I/O column value to ― from O for NC pins of Pin Functions table

5 ? Deleted SNS pin from Pin Functions table

5 ? Added RGR package to Thermal Information table

7 ? Deleted (adjustable version) from VREF parameter name in Electrical Characteristics table

7 ? Deleted SNS pin reference from IFB, ISNS parameter: changed symbol from IFB, ISNS to IFB, deleted sense from parameter name

7 ? Deleted adjustable from footnote

1 and deleted ISNS from footnote

4 of Electrical Characteristics table

7 ? Changed conditions of R1, R2 in Noise Spectral Density figure

11 ? Deleted Fixed Voltage Versions figure from Functional Block Diagram section

14 ? Changed first paragraph of Application Information section: deleted and tracking capabilities from first sentence and changed very low input and output voltages to very low output voltages with low VIN to VOUT headroom in last sentence

18 ? Changed title of first typical application from Adjustable Voltage Part and Setting to Setting the TPS74401

20 ? Deleted reference to adjustable version in first sentence and Typical Application Circuit for the TPS74401 figure in first typical application section.20 ? Changed Because VIN ≥ VOUT + 1.62 V to Because VIN is less than VOUT plus the VBIAS dropout and VBIAS = VIN to

3 TPS74401 www.ti.com.cn ZHCSAL3R CDECEMBER 2005CREVISED APRIL

2017 版权 ? 2005C2017, Texas Instruments Incorporated 修 修订 订历 历史 史记 记录 录 (接 接下 下页 页) VBIAS = VOUT in last paragraph of Detailed Design Procedure in first typical application section

21 ? Deleted Fixed Voltage and Sense Pin section

23 ? Deleted BIAS recommendation from Layout Guidelines section.25 ? Changed RGW Package to VQFN Packages in caption of Layout Schematic figure.25 ? Added RGR package to VQFN description in Power Dissipation section.26 ? Added RGR package to Thermal Considerations section

27 Changes from Revision P (January 2015) to Revision Q Page ? 通篇将 QFN 更改为 VQFN

1 ? 通篇将 TPS744xx 更改为 TPS74401

1 ? 删除了固定输出电压 特性 要点.1 ? Changed VBIAS minimum value in Recommended Operating Conditions table.6 ? Changed footnote

1 for Recommended Operating Conditions table.6 ? Added second row to VOUT accuracy parameter

7 ? Added last four rows to VDO, VBIAS dropout voltage parameter

7 ? Added Timing Requirements table