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L7986TA Datasheet(PDF) 27 Page - STMicroelectronics

Part # L7986TA
Description  3 A step-down switching regulator
PDF  43 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7986TA Datasheet(HTML) 27 Page - STMicroelectronics

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L7986TA
Application information
Doc ID 022098 Rev 3
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Figure 14.
Open-loop gain Bode diagram with electrolytic/tantalum output capacitor
6.5
Thermal considerations
The thermal design is important to prevent the thermal shutdown of the device if junction
temperature goes above 150 °C. The three different sources of losses within the device are:
a)
conduction losses due to the non-negligible RDSon of the power switch; these are
equal to:
Equation 35
P
ON
R
DSON
I
OUT
()
2
D
⋅⋅
=



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