MIC5265-3.2YD5 TR Micrel Inc, MIC5265-3.2YD5 TR Datasheet - Page 10

• Manufacturer Part Number: MIC5265-3.2YD5 TR
• Description: 150mA UCap LDO Regulator In Thin SOT( )
• Manufacturer: Micrel Inc

Specifications of MIC5265-3.2YD5 TR

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.2V
• Voltage - Input: Up to 5.5V
• Voltage - Dropout (typical): 0.21V @ 150mA
• Number Of Regulators: 1
• Current - Output: 150mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MIC5265-3.2YD5TR; MIC5265-3.2YD5TR

MIC5265 Junction-To-Ambient Thermal Resistance
Substituting PD for PD(max) and solving for the ambient
operating temperature will give the maximum operating
conditions for the regulator circuit. The junction-to-
ambient thermal resistance for the minimum footprint is
235 C/W. The maximum power dissipation must not be
exceeded for proper operation.
For example, when operating the MIC5265-2.8YD5 at an
input voltage of 5.0V at 150mA with a minimum footprint
layout, the maximum ambient operating temperature TA
can be determined as follows:
Micrel, Inc.
February 2007
(M5 or D5)
SOT-23-5
Package
Minimum Footprint
θ
JA
Recommended
Thermal Resistance
235°C/W
Copper Clad
θ
JA
125°C
1” Sq.
145°C/W
θ
JC
10
Therefore, a 2.8V application at 150mA of output current
can accept an ambient operating temperature of 47°C in
a SOT-23-5 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
TA = 47.45°C
. 0
33
W
=
125
235
°
C
°
C
−
/
W
T
A
M9999-022307
MIC5265