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MIC33153 Datasheet(PDF) 17 Page - Microchip Technology

Part # MIC33153
Description  4 MHz 1.2A Internal Inductor PWM Buck Regulator with HyperLight Load짰 and Power Good
PDF  28 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MIC33153 Datasheet(HTML) 17 Page - Microchip Technology

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2019 - 2022 Microchip Technology Inc.
DS20006223B-page 17
MIC33153
EQUATION 5-9:
The worst case switch and inductor resistance will
increase at higher temperatures, so a margin of 20%
can be added to account for this:
EQUATION 5-10:
This is well below the maximum 125°C.
PDISS 1.8 1
1
0.80
---------- 1
–
0.45W
=
=
PDISS 0.45 1.2
0.54W
=
=
Therefore:
TJ =
0.54W x (55°C/W) + 50°C
TJ =
79.7°C



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