MCP1824S Microchip Technology Inc., MCP1824S Datasheet - Page 23

• Manufacturer Part Number: MCP1824S
• Description: 300 Ma, Low Voltage, Low Quiescent Current Ldo Regulator
• Manufacturer: Microchip Technology Inc.

5.3.1.2
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
From this table, you can see the difference in maximum
allowable power dissipation between the SOT-223-5
package and the SOT-23-5 package.
SOT-223-5 (62°C/W Rθ
SOT-23-5 (256°C/Watt Rθ
2007 Microchip Technology Inc.
P
P
P
P
D(MAX)
D(MAX)
D(MAX)
D(MAX)
T
T
T
J
J
J
Junction Temperature Estimate
Maximum Package Power
Dissipation at 60°C Ambient
Temperature
= T
= 19.1°C + 60.0°C
= 79.1°C
= (125°C – 60°C) / 62°C/W
= 1.048W
= (125°C – 60°C)/ 256°C/W
= 0.254W
JRISE
+ T
JA
):
A(MAX)
JA
):
MCP1824/MCP1824S
DS22070A-page 23