MIC5310 Micrel Semiconductor, MIC5310 Datasheet - Page 9

• Manufacturer Part Number: MIC5310
• Description: 150mA uCap LDO
• Manufacturer: Micrel Semiconductor

April 2006
Substituting P
operating
operating conditions for the regulator circuit. The
junction-to-ambient
minimum footprint is 90°C/W.
The maximum power dissipation must not be
exceeded for proper operation.
For example, when operating the MIC5310-MFYML at
8-Pin 2x2 MLF
Package
temperature
D
®
for P
Thermal Resistance
D(max)
thermal
and solving for the ambient
will
Minimum Footprint
θ
JA
Recommended
give
resistance
90°C/W
the
maximum
for
the
9
an input voltage of 3.3V and 150mA loads at each
output with a minimum footprint layout, the maximum
ambient operating temperature T
as follows:
Therefore, a 2.8V/1.5V application with 150mA at
each output current can accept an ambient operating
temperature of 93.95°C in a 2mm x 2mm MLF
package. For a full discussion of heat sinking and
thermal effects on voltage regulators, refer to the
“Regulator Thermals” section of Micrel’s Designing
with Low-Dropout Voltage Regulators handbook. This
information can be found on Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
0.345W = (125°C – T
T
A
=93.95°C
A
can be determined
A
)/(90°C/W)
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M9999-042406
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