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LM2622 Datasheet(PDF) 14 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM2622
Description  600kHz/1.3MHz Step-up PWM DC/DC Converter
PDF  16 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2622 Datasheet(HTML) 14 Page - National Semiconductor (TI)

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Application Information (Continued)
1.3 MHZ OPERATION
POWER DISSIPATION
The output power of the LM2622 is limited by its maximum
power dissipation. The maximum power dissipation is deter-
mined by the formula
P
D =(Tjmax -TA)/
θ
JA
where T
jmax is the maximum specidfied junction temperature
(125˚C), T
A is the ambient temperature, and
θ
JA is the ther-
mal resistance of the package.
θ
JA is dependant on the
layout of the board as shown below.
10127311
10127312
10127313
10127330
FIGURE 5. 1.3 MHz operation
www.national.com
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