參數(shù)資料
型號: AAT2506IWP-AQ-T1
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
文件大小: 574K
代理商: AAT2506IWP-AQ-T1
AAT2506
1MHz Step-Down Converter/LDO Regulator
18
2506.2005.12.1.0
R2 is 59k
. 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
for good noise
immunity or 221k
for reduced no load input current.
The AAT2506, combined with an external feedfor-
ward 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 capaci-
tor C1 for stability.
Table 2: Adjustable Resistor Values For Use
With 0.6V Step-Down Converter.
R2 = 59k
R1 (k
)
19.6
29.4
39.2
49.9
59.0
68.1
78.7
88.7
118
124
137
187
267
R2 = 221k
R1 (k
)
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
R1 = V
·
R2 = 0.6V
·
59k
= 88.5k
REF
V
OUT
1.5V
Figure 5: AAT2506 Evaluation Board Schematic.
1. For step-down converter, enhanced transient configuration C8 = 100pF and C1 = 10uF.
Table 3
L1
22
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
AAT2506
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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