TPS74401_15 Datasheet, PDF (2/39 Pages) Texas Instruments – TPS74401 3.0-A, Ultra-LDO with Programmable Soft-Start

TPS74401
SBVS066Q – DECEMBER 2005 – REVISED APRIL 2015
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Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 4
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings ............................................................ 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 6
6.5 Electrical Characteristics........................................... 6
6.6 Timing Requirements ................................................ 7
6.7 Typical Characteristics .............................................. 8
7 Detailed Description ............................................ 13
7.1 Overview ................................................................. 13
7.2 Functional Block Diagrams ..................................... 13
7.3 Feature Description................................................. 14
7.4 Device Functional Modes........................................ 15
7.5 Programming .......................................................... 16
8 Application and Implementation ........................ 18
8.1 Application Information............................................ 18
8.2 Typical Applications ................................................ 20
9 Power Supply Recommendations...................... 25
10 Layout................................................................... 26
10.1 Layout Guidelines ................................................. 26
10.2 Layout Example .................................................... 26
10.3 Power Dissipation ................................................. 26
10.4 Thermal Considerations ........................................ 27
11 Device and Documentation Support ................. 30
11.1 Device Support...................................................... 30
11.2 Documentation Support ....................................... 30
11.3 Trademarks ........................................................... 30
11.4 Electrostatic Discharge Caution ............................ 30
11.5 Glossary ................................................................ 30
12 Mechanical, Packaging, and Orderable
Information ........................................................... 30
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision P (January 2015) to Revision Q
Page
• Changed QFN to VQFN throughout document ...................................................................................................................... 1
• Changed TPS744xx to TPS74401 throughout document ..................................................................................................... 1
• Deleted fixed output Features bullet....................................................................................................................................... 1
• Changed V_BIAS minimum value in Recommended Operating Conditions table...................................................................... 5
• Changed footnote 1 for Recommended Operating Conditions table...................................................................................... 5
• Added second row to V_OUT accuracy parameter ................................................................................................................... 6
• Added last four rows to V_DO, V_BIAS dropout voltage parameter .............................................................................................. 6
• Added Timing Requirements table ......................................................................................................................................... 7
• Added Device Functional Modes section ............................................................................................................................. 15
• Changed third paragraph of Dropout Voltage ...................................................................................................................... 19
• Changed first sentence of Without an Auxiliary Bias section ............................................................................................... 25
• Changed Power Dissipation section location; moved to after Layout Example section....................................................... 26
• Added Development Support section ................................................................................................................................... 30
• Added information about reference design TIDU421 and user guide SLVU143 to Related Documentation section ......... 30
Changes from Revision O (March 2013) to Revision P
Page
• Deleted Active High Enable bullet from Features list ............................................................................................................ 1
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 5
• Changed footnote 3c for Thermal Information table .............................................................................................................. 6
• Changed y-axis in Figure 1, Figure 2, Figure 4, and Figure 7 from abbreviation (I_OUT) to text (Output Current) .................. 8
• Added "V" to V_IN = 1.8 V condition in Figure 9, Figure 10, and Figure 11 ............................................................................ 8
• y-axis and graph title in Figure 15 from abbreviation (I_OUT) to text (Output Current) ............................................................ 9
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