AAT1120IES-0.6-T1 Advanced Analog Technology, Inc., AAT1120IES-0.6-T1 Datasheet - Page 16
AAT1120IES-0.6-T1
Manufacturer Part Number
AAT1120IES-0.6-T1
Description
500mA Step-Down Converter
Manufacturer
Advanced Analog Technology, Inc.
Datasheet
1.AAT1120IES-0.6-T1.pdf
(20 pages)
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Input Capacitor
Input Ripple V
AAT1120 Losses
C
I
P = esr · I
P
T
16
RMS
J(MAX)
TOTAL
IN
=
=
⎛
⎝
=
+ (t
=
+ (5ns · 1.5MHz · 0.2A + 30µA) · 4.2V = 26.14mW
= T
I
2
O
V
I
I
0.2
O
PP
O
= 0.1Arms
RMS
sw
AMB
2
· (R
· F
2
- ESR · 4 · F
2
· (0.59 Ω · 1.8V + 0.42Ω · [4.2V - 1.8V])
+ Θ
PP
= 5mΩ · (0.1A)
S
DS(ON)H
· I
= 25mV
1
JA
O
⎞
⎠
· P
+ I
· V
LOSS
Q
) · V
O
S
V
+ R
= 85°C + (50°C/W) · 26.14mW = 86.3°C
=
IN
IN
4.2V
2
DS(ON)L
⎛
⎝
= 0.05mW
25mV
0.2A
· [V
- 5mΩ · 4 · 1.5MHz
IN
-V
O
1
] )
⎞
⎠
= 1.38µF (use 4.7µF)
500mA Step-Down Converter
AAT1120
1120.2007.01.1.0
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