MIC5237 datasheet(9/18 Pages) MICROCHIP

Part #	MIC5237

Description	500 mA Low Dropout Regulator

PDF	18 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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9 / 18 page

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2018 - 2022 Microchip Technology Inc. and its subsidiaries

DS20006095B-page 9

MIC5237

EQUATION 4-4:

θCS is approximately 1°C/W and θJC for the TO-220 is

3°C/W in this example.

EQUATION 4-5:

EQUATION 4-6:

Therefore, a heat sink with a thermal resistance of

19.5°C/W will allow the part to operate safely and it will

not exceed the maximum junction temperature of the

device. The heat sink can be reduced by limiting power

dissipation, by reducing the input voltage or output

current. Either the TO-220 or TO-263 package can

operate reliably at 2W of power dissipation without a

heat sink. Above 2W, a heat sink is recommended.

SA JA JC

–

JA

125C 25C

–

4.260W

-----------------------------------

23.5C/W

SA 23.5C/W 3C/W 1C/W





–

19.5C/W

MIC5237 Datasheet(PDF) 9 Page - Microchip Technology