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參數(shù)資料
| 型號： | AAT1151IKS-3.3-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 850kHz 700mA Synchronous Buck DC/DC Converter |
| 中文描述： | 850kHz 700mA的同步降壓DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 535K |
| 代理商： | AAT1151IKS-3.3-T1 |
AAT1151
850kHz 700mA Synchronous
Buck DC/DC Converter
12
1151.2007.01.1.6
Thermal Calculations
There are two types of losses associated with the
AAT1151 output switching MOSFET: switching loss-
es and conduction losses. Conduction losses are
associated with the R
DS(ON)
characteristics of the
output switching device. At the full load condition,
assuming continuous conduction mode (CCM), a
simplified form of the total losses is given by:
where I
q
is the AAT1151 quiescent current.
Once the total losses have been determined, the
junction temperature can be derived from the
θ
JA
for the MSOP-8 package.
Adjustable Output
For applications requiring an output other than the
fixed available, the 1V version can be programmed
externally. Resistors R3 and R4 of Figure 7 force
the output to regulate higher than 1 volt. R4 should
be 100 times less than the 1M
Ω
internal resistance
of the FB pin (recommended 10k
Ω
). Once R4 is
selected, R3 can be calculated. For a 1.25 volt out-
put with R4 set to 10.0k
Ω
, R3 is 2.55k
Ω
.
R3 = (V
O
- 1) · R4 = 0.25 · 10k
Ω
= 2.55k
Ω
T
J
= P ·
θ
JA
+ T
AMB
SW
O
S
IN
IN
I
O
2
·
(R
DS(ON)H
· V
O
+
R
DS(ON)L
· (V
IN
·
V
O
))
V
P =
F
I
V
·
+ I
Q
) · V
IN
·
·
+ (t
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1151IVN-1.0-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:850kHz 700mA Synchronous Buck DC/DC Converter |
| AAT1151IVN-1.8-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:850kHz 700mA Synchronous Buck DC/DC Converter |
| AAT1151IVN-2.5-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:850kHz 700mA Synchronous Buck DC/DC Converter |
| AAT1152 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:850kHz 1A Synchronous Buck DC/DC Converter |
| AAT1152_06 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:850kHz 1A Buck DC/DC Converter |
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