mic5310-ssyml Micrel Semiconductor, mic5310-ssyml Datasheet - Page 9

• Manufacturer Part Number: mic5310-ssyml
• Description: Mic5310 Dual, 150ma ?cap In 2mm ? 2mm Mlf
• Manufacturer: Micrel Semiconductor

August 2007
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.
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
For example, when operating the MIC5310-MFYML at
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
)/(90°C/W)
A
can be determined
M9999-082407-B
®