MIC5320-SGYD6 datasheet(11/13 Pages) MICREL

Part #	MIC5320-SGYD6

Description	High-Performance Dual 150mA 關Cap ULDO?

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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11 / 13 page

Micrel, Inc.

MIC5320

February 2011

11

M9999-021111-H

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 100°C/W.

The maximum power dissipation must not be

exceeded for proper operation.

For example, when operating the MIC5320-MFYMT at

an input voltage of 3.3V and 150mA loads at each

output with a minimum footprint layout, the maximum

ambient operating temperature TA can be determined

as follows:

0.345W = (125°C – TA)/(100°C/W)

TA = 90.5°C

Therefore, a 2.8V/1.5V application with 150mA at

each output current can accept an ambient operating

temperature of 90.5°C in a 1.6mm x 1.6mm Thin

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

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MIC5320-SGYD6 Datasheet(PDF) 11 Page - Micrel Semiconductor

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