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參數(shù)資料
| 型號： | AAT1126 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | 600mA, 1MHz Step-Down Converter |
| 中文描述： | 600毫安，1MHz的降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大小： | 570K |
| 代理商： | AAT1126 |
AAT1126
600mA, 1MHz Step-Down Converter
1126.2006.05.1.1
13
Table 2: Adjustable Resistor Values For Use
With 0.6V Step-Down Converter.
Thermal Calculations
There are three types of losses associated with the
AAT1126 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.
For the condition where the step-down converter is
in dropout at 100% duty cycle, the total device dis-
sipation reduces to:
P
TOTAL
= I
O
2
· R
DSON(HS)
+ I
Q
· V
IN
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
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
Figure 5: AAT1126 Adjustable Evaluation Board Schematic.
V
OUT
V
IN
1
2
3
Enable
JP1
R1
118K
L1
4.7μH
GND
1
EN
2
LX
3
VIN
5
OUT
4
AAT1126
C2
4.7μF
C1
10μF
R2
59K
GND
LX
L1 CDRH3D16-4R7
C2 4.7μF 10V 0805 X5R
C1 10μF 6.3V 0805 X5R
U1 AAT1126 SOT23-5
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| AAT1143 | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:4; Connector Shell Size:22; Connecting Termination:Solder; Circular Shell Style:Square Flange Receptacle; Body Style:Straight |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1126IGV-0.6-T1 | 制造商:Skyworks Solutions Inc 功能描述:SKYAAT1126IGV-0.6-T1 DC/DC CONVERTERS (S 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER |
| AAT1130 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:2.5MHz 500mA Step-Down DC/DC Converter |
| AAT1130IJQ-0.6 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:2.5MHz 500mA Step-Down DC/DC Converter |
| AAT1130IJQ-1.8 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:2.5MHz 500mA Step-Down DC/DC Converter |
| AAT1130IJQ-1.8-T1 | 制造商:Advanced Analogic Tech 功能描述:DC/DC STEP DOWN CONV 2.5MHZ 500MA 制造商:Advanced Analogic Tech 功能描述:DC/DC STEP DOWN CONV, 2.5MHZ, 500MA |
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