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NCP703
典型特征
100
RR ,纹波抑制(分贝)
90
80
70
60
50
40
30
20
10
0
V
IN
= 2.3 V
V
OUT
= 1.8 V
C
IN
=无
C
OUT
= 1
mF
MLCC , X7R ,
1206尺寸
0.01
0.1
1
10
100
1000
10,000
IOUT = 1毫安
IOUT = 10毫安
IOUT = 100毫安
IOUT = 200毫安
IOUT = 300毫安
100
RR ,纹波抑制(分贝)
90
80
70
60
50
40
30
20
10
0
V
IN
= 3.0 V
V
OUT
= 2.5 V
C
IN
=无
C
OUT
= 1
mF
MLCC , X7R ,
1206尺寸
0.01
0.1
1
10
100
1000 10,000
IOUT = 1毫安
IOUT = 10毫安
IOUT = 100毫安
IOUT = 200毫安
IOUT = 300毫安
男,频率(KHz )
男,频率(KHz )
图29.电源抑制比,
V
OUT
= 1.8 V
100
RR ,纹波抑制(分贝)
90
80
70
60
50
40
30
20
10
0
V
IN
= 3.8 V
V
OUT
= 3.3 V
C
IN
=无
C
OUT
= 1
mF
MLCC , X7R ,
1206尺寸
0.01
0.1
1
10
100
1000
10,000
IOUT = 1毫安
IOUT = 10毫安
IOUT = 100毫安
IOUT = 200毫安
IOUT = 300毫安
100
RR ,纹波抑制(分贝)
90
80
70
60
50
40
30
20
10
0
图30.电源抑制比,
V
OUT
= 2.5 V
COUT = 1MF
COUT = 4.7米
COUT = 10米
V
IN
= 3.8 V
V
OUT
= 3.3 V
C
IN
=无
MLCC , X7R ,
1206尺寸
0.01
0.1
1
10
100
1000 10,000
男,频率(KHz )
男,频率(KHz )
图31.电源抑制比,
V
OUT
= 3.3 V
100
RR ,纹波抑制(分贝)
90
80
70
50
40
30
20
10
0
V
IN
= 3.8 V
V
OUT
= 3.3 V
C
IN
=无
MLCC , X7R ,
1206尺寸
0.01
0.1
1
10
100
1000
10,000
ESR (W)的
60
COUT = 1MF
COUT = 4.7米
COUT = 10米
10
图32.电源抑制比,
V
OUT
= 3.3 V,I
OUT
= 10毫安
不稳定区域
V
OUT
= 3.3 V
1
V
OUT
= 0.8 V
稳定区
V
IN
= 5.5 V
C
IN
= C
OUT
= 1
mF
MLCC , X7R , 1206尺寸
0
50
100
150
200
250
300
I
OUT
,输出电流(mA )
0.1
男,频率(KHz )
图33.电源抑制比,
V
OUT
= 3.3 V,I
OUT
= 300毫安
图34.输出电容的ESR与输出
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9