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參數(shù)資料
| 型號： | AAT1143IJS-2.5-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:3; Connector Shell Size:28; Connecting Termination:Solder; Circular Shell Style:Square Flange Receptacle; Body Style:Straight |
| 中文描述： | 1MHz的400mA的降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 594K |
| 代理商： | AAT1143IJS-2.5-T1 |
AAT1143
1MHz 400mA Step-Down Converter
1143.2005.09.1.7
13
The adjustable version of the AAT1143, combined
with an external feedforward capacitor (C4 in
Figure 1), delivers enhanced transient response for
extreme pulsed load applications. The addition of
the feedforward capacitor typically requires a larg-
er output capacitor C1 for stability.
Table 2: Adjustable Resistor Values For Use
With 0.6V Step-Down Converter.
Thermal Calculations
There are three types of losses associated with
the AAT1143 step-down converter: switching loss-
es, conduction losses, and quiescent current loss-
es. Conduction losses are associated with the
R
DS(ON)
characteristics of the power output switch-
ing devices. Switching losses are dominated by
the gate charge of the power output switching
devices. At full load, assuming continuous con-
duction mode (CCM), a simplified form of the LDO
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(HS)
· V
O
+ R
DSON(LS)
· [V
IN
- V
O
])
V
IN
=
+ (t
sw
· F · I
O
+ I
Q
) · V
IN
R2 = 59k
R1 (k
)
19.6
29.4
39.2
49.9
59.0
68.1
78.7
88.7
118
124
137
187
R2 = 221k
R1 (k
)
75
113
150
187
221
261
301
332
442
464
523
715
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
Figure 5: AAT1143 Adjustable Evaluation Board Schematic.
L1 CDRH3D16-4R7
C1, C2 4.7
F 10V 0805 X5R
4.7
μ
H
L1
4.7
μ
F
C1
4.7
μ
F
C2
U1 AAT1143 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
AAT1143
U1
GND2
118k
R1
59k
R2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT1143IJS-3.3-T1 | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:3; Connector Shell Size:28; Connecting Termination:Solder; Circular Shell Style:Square Flange Receptacle; Body Style:Straight |
| AAT1145 | 1.2A Step-Down Converter |
| AAT1145IDE-0.6-T1 | 1.2A Step-Down Converter |
| AAT1145IDE-1.8-T1 | 1.2A Step-Down Converter |
| AAT1146 | Fast Transient 400mA Step-Down Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1143IJS-3.3-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1MHz 400mA Step-Down Converter |
| AAT1145 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1.5A Step-Down Converter |
| AAT1145_08 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1.5A Step-Down Converter |
| AAT1145IDE-0.6-T1 | 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER |
| AAT1145IDE-1.8-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1.5A Step-Down Converter |
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