AAT1146IJS-1.2-T1 View Datasheet(PDF) - Analog Technology Inc
Part Name
Description
MFG CO.
'AAT1146IJS-1.2-T1' PDF : 20 Pages View PDF
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AAT1146 Losses
PTOTAL
=
IO2
·
(RDSON(HS)
·
VO
+ RDSON(LS)
VIN
·
[VIN
-VO])
+ (tsw · F · IO + IQ) · VIN
PRODUCT DATASHEET
AAT1146
Fast Transient 400mA Step-Down Converter
0.42 · (0.725Ω · 1.8V + 0.7Ω · [4.2V - 1.8V])
=
4.2V
+ (5ns · 1.4MHz · 0.4A + 70μA) · 4.2V = 126mW
TJ(MAX) = TAMB + ΘJA · PLOSS = 85°C + (160°C/W) · 126mW = 105.1°C
1146.2008.06.1.6
www.analogictech.com
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