MIC5265-2.6YD5 datasheet(10/11 Pages) MICREL

Part #	MIC5265-2.6YD5

Description	150mA uCap LDO Regulator

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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Micrel, Inc.

MIC5265

April 2005

10

M9999-041505

(408) 955-1690

MIC5265 Junction-To-Ambient Thermal Resistance

Package

θ

JA Recommended

Minimum Footprint

θ

JA 1” Sq.

Copper Clad

θ

JC

SOT-23-5

(M5 or D5)

235°C/W

125°C

145°C/W

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:

W

C

T

C

W

A

/

235

125

33

.

0

°

−

°

=

TA = 47.45°C

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

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MIC5265-2.6YD5 Datasheet(PDF) 10 Page - Micrel Semiconductor

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