MIC5319-1.3HYML(2006) 查看數據表（PDF） - Micrel

零件编号

产品描述 (功能)

生产厂家

MIC5319-1.3HYML
(Rev.:2006)

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

Micrel 

MIC5319

Micrel, Inc.

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

MIC5319 in the 2mm x 2mm MLF package.

Package

2 x 2 MLF®

θJA Recommended

Minimum Footprint

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 condi-

tions for the regulator circuit. The maximum power dissipation

must not be exceeded for proper operation.

0.25W = 125°C − TA

93°C /W

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 information

can be found on Micrel's website at:

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

April 2006

10

M9999-042406

Share Link: