TPS745-Q1_V06 datasheet(25/45 Pages) TI

Teilenummer	TPS745-Q1

Bauteilbeschribung	TPS745-Q1 500-mA LDO With Power-Good in Small Wettable Flank WSON Packages

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1-mm

2-mm

A

Buried plane and bottom layer Cu ground

planes are modeled with Area = A×A

25

TPS745-Q1

www.ti.com

SBVS355A – JUNE 2019 – REVISED OCTOBER 2019

Product Folder Links: TPS745-Q1

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Application Information (continued)

As shown in Figure 60, each layer has a copper plane of equal area.

Figure 60. Board parameters used for simulation

For a more comprehensive study of how thermal resistance varies with copper area and thickness, see the An

empirical analysis of the impact of board layout on LDO thermal performance application report. As shown in

Figure 61, modifying board layout to be more thermally enhanced can lower the RθJA value from 80.3°C/W to

46.8°C/W or better.

Figure 61. TPS745-Q1 (WSON) RθJA versus Board Layout

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Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Texas Instruments	TPS745-Q1	4Mb / 45P	[Old version datasheet] TPS745-Q1 500-mA LDO With Power-Good in Small Wettable Flank WSON Packages
	TPS745-Q1	3Mb / 41P	[Old version datasheet] TPS745-Q1 500-mA LDO With Power-Good in Small Wettable Flank WSON Packages
	TPS745-Q1	4Mb / 45P	[Old version datasheet] TPS745-Q1 500-mA LDO With Power-Good in Small Wettable Flank WSON Packages
	TPS745-Q1	4Mb / 45P	[Old version datasheet] TPS745-Q1 500-mA LDO With Power-Good in Small Wettable Flank WSON Packages
	TPS745-Q1	4Mb / 44P	[Old version datasheet] TPS745-Q1 500-mA LDO With Power-Good in Small Wettable Flank WSON Packages
	TPS745-Q1	2Mb / 29P	[Old version datasheet] TPS745-Q1 500-mA LDO With Power-Good in a Small Wettable Flank WSON Package
	TPS745-Q1	2Mb / 30P	[Old version datasheet] TPS745-Q1 500-mA LDO With Power-Good in a Small Wettable Flank WSON Package
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	TPS746-Q1	3Mb / 45P	[Old version datasheet] TPS746-Q1 1-A LDO With Power-Good in Small Wettable Flank WSON Packages
	TPS746-Q1	4Mb / 44P	[Old version datasheet] TPS746-Q1 1-A LDO With Power-Good in Small Wettable Flank WSON Packages