AAT1153 Просмотр технического описания (PDF) - Advanced Analogic Technologies
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Компоненты Описание
производитель
AAT1153 Datasheet PDF : 19 Pages
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Input Capacitor
Input ripple VPP = 25mV
1
1
CIN(MIN) = ⎛ VPP
⎝ IO
- ESR⎞⎠ · 4 · fS
=
= 13.9µF; use 22µF
⎛0.025
⎝2
-
0.01⎞⎠
·4
· 1.2
· 106
IRMS =
IO
2
=
2
2
= 1Arms
PCIN = ESR · IRMS2 = 0.01 · 12 = 10mW
PRODUCT DATASHEET
AAT1153
2A Step-Down Converter
AAT1153 Losses
PTOTAL = IO2 · RDS(ON)P · D + IO2 · RDS(ON)N · (1 - D) + (tSW · fS · IO) · VIN
1.8
= 22 · 0.135 ·
4.2
+ 22 · 0.095 · ⎛⎝1 -
1.8⎞
4.2⎠
+
(5
·
10-9
·
1.2
·
106
·
2)
·
4.2
=
498.9mW
18
www.analogictech.com
1153.2008.02.1.2
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