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MCP1826-1802E/DC Datasheet(PDF) 21 Page - Microchip Technology

Part # MCP1826-1802E/DC
Description  1000 mA, Low Voltage, Low Quiescent Current LDO Regulator
PDF  36 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP1826-1802E/DC Datasheet(HTML) 21 Page - Microchip Technology

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© 2007 Microchip Technology Inc.
DS22057A-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 =TJRISE + TA(MAX)
TJ = 30.12°C + 60.0°C
TJ = 90.12°C
TO-220-5 (29.3° C/W R
θJA):
PD(MAX) = (125°C – 60°C) / 29.3°C/W
PD(MAX) = 2.218W
DDPAK-5 (31.2°C/Watt R
θJA):
PD(MAX) = (125°C – 60°C)/ 31.2°C/W
PD(MAX) = 2.083W



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