參數(shù)資料
型號: AAT1123IJS-0.6-T1
廠商: Advanced Analog Technology,lnc.
英文描述: 1MHz Step-Down Converter
中文描述: 1MHz的降壓轉(zhuǎn)換器
文件頁數(shù): 16/20頁
文件大?。?/td> 568K
代理商: AAT1123IJS-0.6-T1
Input Capacitor
Input Ripple V
PP
= 25mV
AAT1123 Losses
T
J(MAX)
= T
AMB
+
Θ
JA
· P
LOSS
= 85
°
C + (160
°
C/W) · 122mW = 104.5
°
C
P
TOTAL
+ (t
sw
· F · I
O
+ I
Q
) · V
IN
I
O
2
· (R
DSON(HS)
· V
O
+ R
DSON(LS)
· [V
IN
-V
O
]
)
V
IN
=
=
+ (5ns · 1.0MHz · 0.4A + 50
μ
A) · 4.2V = 122mW
0.4
2
· (0.725
Ω
·
1.8V + 0.7
Ω
·
[4.2V - 1.8V])
4.2V
I
O
2
RMS
I
P = esr
·
I
RMS
2
= 5m
Ω
·
(0.2A)
2
= 0.2mW
=
= 0.2Arms
C
IN
=
=
= 4.75μF
1
- ESR
·
4
·
F
S
V
PP
I
O
1
- 5m
Ω
·
4
·
1MHz
0.4A
25mV
AAT1123
1MHz Step-Down Converter
16
1123.2007.02.1.6
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