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TLV751 数据表(PDF) 21 Page - Texas Instruments

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部件名 TLV751
功能描述  TLV751 Dual, 500-mA, High-Accuracy, Adjustable-LDO in a Small-Size Package
PDF  29 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

TLV751 数据表(HTML) 21 Page - Texas Instruments

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Frequency (Hz)
0
10
20
30
40
50
60
70
80
90
10
100
1k
10k
100k
1M
10M
ILOAD = 10 mA
ILOAD = 100 mA
ILOAD = 250 mA
ILOAD = 500 mA
21
TLV751
www.ti.com
SBVS385 – DECEMBER 2019
Product Folder Links: TLV751
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
8.2.2.2 Thermal Dissipation
The junction temperature can be determined using the junction-to-ambient thermal resistance (RθJA) and the total
power dissipation (PD). Use Equation 7 to calculate the power dissipation. Multiply PD by RθJA as Equation 8
shows and add the ambient temperature (TA) to calculate the junction temperature (TJ).
PD = (IGND+ IOUT) × (VIN – VOUT)
(7)
TJ = RθJA × PD + TA
(8)
Calculate the maximum ambient temperature as Equation 9 shows if the (TJ(MAX)) value does not exceed 125°C.
Equation 10 calculates the maximum ambient temperature with a value of 104.93°C.
TA(MAX) = TJ(MAX) – RθJA × PD
(9)
TA(MAX) = 125°C – 80.3°C/W × (3.8 V – 3.3 V) × (0.5 A) = 104.93°C
(10)
8.2.3 Application Curve
VIN = 3.8 V, VOUT = 3.3 V, COUT = 2.2 µF
Figure 43. PSRR vs Frequency and ILOAD



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