MCP1726T-ADJE/SN Microchip Technology, MCP1726T-ADJE/SN Datasheet - Page 20
MCP1726T-ADJE/SN
Manufacturer Part Number
MCP1726T-ADJE/SN
Description
IC,VOLT REGULATOR,ADJUSTABLE,+0.4V TO +5V,CMOS,SOP,8PIN,PLASTIC
Manufacturer
Microchip Technology
Specifications of MCP1726T-ADJE/SN
Rohs Compliant
YES
Regulator Topology
Positive Adjustable
Voltage - Output
0.8 ~ 5 V
Voltage - Input
2.3 ~ 6 V
Voltage - Dropout (typical)
0.22V @ 1A
Number Of Regulators
1
Current - Output
1A (Min)
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
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MCP1726
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:
As you can see from the result, this application will be
operating very near the maximum operating junction
temperature of 125°C. The PCB layout for this
application is very important as it has a significant
impact on the junction-to-ambient thermal resistance
(Rθ
in this application.
Maximum Package Power Dissipation at
70°C Ambient Temperature
From this table you can see the difference in maximum
allowable power dissipation between the 3x3 DFN
package and the 8-pin SOIC package. This difference
is due to the exposed metal tab on the bottom of the
DFN package. The exposed tab of the DFN package
provides a very good thermal path from the die of the
LDO to the PCB. The PCB then acts like a heatsink,
providing more area to distribute the heat generated by
the LDO.
DS21936C-page 20
3x3 DFN (41° C/W Rθ
8LD SOIC (150°C/Watt Rθ
JA
P
P
P
P
) of the 3x3 DFN package, which is very important
D(MAX)
D(MAX)
D(MAX)
D(MAX)
T
T
T
= (125°C – 70°C) / 41° C/W
= 1.34W
= (125°C – 70°C)/ 150° C/W
= 0.366W
J
J
J
=
=
=
JA
)
T
48.8°C + 70.0°C
118.8°C
JRISE
JA
)
+ T
A(MAX)
© 2007 Microchip Technology Inc.