TPS74801 Datasheet, PDF (14/19 Pages) Texas Instruments – 1.5A LDO Linear Regulator with Programmable Soft-Start

TPS74801
SBVS074 – JANUARY 2007
PCB Cross Section
0.062"
4-layer, 0.062” FR4.
Vias are 0.012” diameter, plated.
Top/Bottom layers are 2oz. copper.
Inner layers are 1oz. copper.
T_J
R_qJC
T_C
R_qCS
T_S
R_qSA
T_A
R_qJA = R_qJC + R_qCS + R_qSA
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PCB Top View
0.5 in²
1.0 in²
2.0 in²
90
85
80
75
70
65
60
55
50
45
40
0
0 LFM
150 LFM
250 LFM
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Area (in²)
Figure 29. PCB Layout and Corresponding R_θJA Data, No Vias Under Thermal Pad
14
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