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參數(shù)資料
| 型號： | AAT1147IJS-0.6-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter |
| 中文描述： | 高效率，低噪聲，快速瞬態(tài)400mA的降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 13/19頁 |
| 文件大?。?/td> | 620K |
| 代理商： | AAT1147IJS-0.6-T1 |
The AAT1147, combined with an external feedfor-
ward capacitor (C4 in Figure 1), delivers enhanced
transient response for extreme pulsed load appli-
cations. The addition of the feedforward capacitor
typically requires a larger output capacitor C1 for
stability.
Table 2: Resistor Values For Use With 0.6V
Step-Down Converter.
Thermal Calculations
There are three types of losses associated with the
AAT1147 step-down converter: switching losses,
conduction losses, and quiescent current losses.
Conduction losses are associated with the R
DS(ON)
characteristics of the power output switching
devices. Switching losses are dominated by the
gate charge of the power output switching devices.
At full load, assuming continuous conduction mode
(CCM), a simplified form of the losses is given by:
I
Q
is the step-down converter quiescent current.
The term t
sw
is used to estimate the full load step-
down converter switching losses.
P
TOTAL
I
O
2
· (R
DSON(H)
· V
O
+ R
DSON(L)
· [V
IN
- V
O
])
V
IN
=
+ (t
sw
· F
S
· I
O
+ I
Q
) · V
IN
R2 = 59k
Ω
R1 (k
Ω
)
19.6
29.4
39.2
49.9
59.0
68.1
78.7
88.7
118
124
137
187
267
R2 = 221k
Ω
R1 (k
Ω
)
75
113
150
187
221
261
301
332
442
464
523
715
1000
V
OUT
(V)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.8
1.85
2.0
2.5
3.3
AAT1147
High Efficiency, Low Noise, Fast Transient
400mA Step-Down Converter
1147.2006.05.1.0
13
Figure 5: AAT1147 Evaluation Board Schematic.
L1 CDRH3D16-4R7
C1 10
F 10V 0805 X5R
C2 4.7
μ
F 10V 0805 X5R
4.7
μ
H
L1
10
μ
F
C1
4.7
μ
F
C2
U1 AAT1147 SC70JW-8
V
OUT
GND
V
IN
1
2
3
Enable
LX
EN
1
OUT
2
VIN
3
LX
4
AGND
5
PGND
6
PGND
7
PGND
8
AAT1147
U1
GND2
118k
R1
59k
R2
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1149 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:3MHz Fast Transient 400mA Step-Down Converter |
| AAT1149_08 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:3MHz Fast Transient 400mA Step-Down Converter |
| AAT1149A | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:2.2MHz Fast Transient 400mA Step-Down Converter |
| AAT1149AIUV-1.875-T1 | 功能描述:開關變換器、穩(wěn)壓器與控制器 2.2MHz Fast Trans 400mA StepDown Cnvrt RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| AAT1149B | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:2.2MHz Fast Transient 400mA Step-Down Converter |
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