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參數(shù)資料
| 型號： | AAT2500 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | 1MHz Step-Down Converter/LDO Regulator |
| 中文描述： | 1MHz的降壓轉(zhuǎn)換器/ LDO穩(wěn)壓器 |
| 文件頁數(shù)： | 18/26頁 |
| 文件大?。?/td> | 881K |
| 代理商： | AAT2500 |
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AAT2500
1MHz Step-Down Converter/LDO Regulator
18
2500.2006.05.1.16
R2 is 59k
Ω
. Although a larger value will further
reduce quiescent current, it will also increase the
impedance of the feedback node, making it more
sensitive to external noise and interference. Table 2
summarizes the resistor values for various output
voltages with R2 set to either 59k
Ω
for good noise
immunity or 221k
Ω
for reduced no load input current.
The adjustable version of the AAT2500, combined
with an external feedforward capacitor (C8 in
Figures 2 and 5), delivers enhanced transient
response for extreme pulsed load applications. The
addition of the feedforward capacitor typically
requires a larger output capacitor C1 for stability.
Table 2: Adjustable Resistor Values For Use
With 0.6V Step-Down Converter.
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
R2 = 221k
Ω
R1 (k
Ω
)
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
R1 = V
·
R2 = 0.6V
·
59k
Ω
= 88.5k
Ω
REF
V
OUT
1.5V
Figure 5: AAT2500 Evaluation Board Schematic.
1. For step-down converter, enhanced transient configuration C8 = 100pF and C1 = 10uF.
Table 3
L1
4.7
μ
F
1
C1
10
μ
F
C2
GND
V
IN1
1
2
3
Buck Enable
LX1
GND
Table 3
R1
59k
R2
PGND
1
LX
2
VP
3
VCC
4
ENLDO
9
EN
10
FB
11
SGND
12
IN
5
OUT
6
GND
8
BYP
7
AAT2500
U1
4.7
μ
F
C4
10
μ
F
C3
10nF
C5
1
2
3
LDO Enable
V
OUTLDO
V
OUTBUCK
1
2
3
LDO Input
0.01
μ
F
C7
C8
1
n/a
C9
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| AAT2500IFP-AQ-T1 | 1MHz Step-Down Converter/LDO Regulator |
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| AAT2500IWP-AI-T1 | 1MHz Step-Down Converter/LDO Regulator |
| AAT2500IWP-AN-T1 | 1MHz Step-Down Converter/LDO Regulator |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT2500B | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Adjustable 3-Channel Regulator |
| AAT2500BIZL-BAA-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Adjustable 3-Channel Regulator |
| AAT2500IFP-AQ-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1MHz Step-Down Converter/LDO Regulator |
| AAT2500IWP-AG-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1MHz Step-Down Converter/LDO Regulator |
| AAT2500IWP-AI-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1MHz Step-Down Converter/LDO Regulator |
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