MCP1826_13 datasheet(21/38 Pages) MICROCHIP

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MCP1826 Arkusz danych(PDF) 21 Page - Microchip Technology

Numer części	MCP1826

Szczegółowy opis	1000 mA, Low-Voltage, Low Quiescent Current LDO Regulator

PDF	38 Pages

Scroll/Zoom	100%

Producent	MICROCHIP [Microchip Technology]

Strona internetowa	http://www.microchip.com

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21 / 38 page

 2007-2013 Microchip Technology Inc.

DS22057B-page 21

MCP1826/MCP1826S

5.3.1.2

Junction Temperature Estimate

To estimate the internal junction temperature, the

calculated temperature rise is added to the ambient or

offset temperature. For this example, the worst-case

junction temperature is estimated below:

5.3.1.3

Maximum Package Power

Dissipation at 60°C Ambient

Temperature

From this table, you can see the difference in maximum

allowable power dissipation between the TO-220-5

package and the DDPAK-5 package.

TJ =TJ(RISE) + TA(MAX)

TJ = 30.12°C + 60.0°C

TJ = 90.12°C

TO-220-5 (29.3° C/W R

JA):

PD(MAX) = (125°C – 60°C) / 29.3°C/W

PD(MAX) = 2.218W

DDPAK-5 (31.2°C/Watt R

JA):

PD(MAX) = (125°C – 60°C)/ 31.2°C/W

PD(MAX) = 2.083W

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