MIC5319-8BD5 Ver la hoja de datos (PDF) - Micrel

Número de pieza

componentes Descripción

Fabricante

MIC5319-8BD5

500mA µCap Ultra-Low Dropout, High PSRR LDO Regulator

Micrel 

MIC5319

Micrel

Table 1 shows junction-to-ambient thermal resistance for the

MIC5319 in the 2mm x 2mm MLF package.

0.25W = 125°C − TA

93°C/W

Package

θJA Recommended

Minimum Footprint

2 x 2 MLF™

93°C/W

SOT-23-5

235°C/W

Table 1. Thermal Resistance

θJC

2°C/W

Substituting 0.25W for PD(max) and solving for the ambient

operating temperature will give the maximum operating con-

ditions for the regulator circuit. The maximum power dissipa-

tion must not be exceeded for proper operation.

TA = 101.75°C

Therefore, a 2.8V application at 500mA of output current can

accept an ambient operating temperature of 101.75°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 informa-

tion can be found on Micrel's website at:

http://www.micrel.com/_PDF/other/LDOBk_ds.pdf

October 2004

9

M9999-100604

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