MIC5501 datasheet(11/22 Pages) MICROCHIP

부품명	MIC5501

상세설명	300 mA Single Output LDO in Small Packages

PDF	22 Pages

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 2019 Microchip Technology Inc.

DS20006006B-page 11

MIC5501/2/3/4

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 250°C/W.

The maximum power dissipation must not be exceeded

for proper operation.

For example, when operating the MIC5501-YMT at an

input voltage of 3.6V and 300 mA load with a minimum

footprint layout, the maximum ambient operating

temperature TA can be determined as follows:

EQUATION 4-4:

0.240W

125

CT

–

 250C/W



T A

C

Therefore,

the

maximum

ambient

operating

temperature allowed in a 1 mm × 1 mm DFN package

is 65°C. For a full discussion of heat sinking and

thermal effects on voltage regulators, refer to the

“Regulator Thermals” section of Microchip’s Designing

with Low-Dropout Voltage Regulators handbook.

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