数据表
–10
–20
–30
–40
I
OUT
= 100A
I
OUT
= 1毫安
I
OUT
= 10毫安
I
OUT
= 100毫安
I
OUT
= 300毫安
I
OUT
= 500毫安
ADP124/ADP125
5
V
OUT
= 4.2V
4
噪声（ μV / √Hz的）
V
OUT
= 3.3V
3
PSRR （分贝）
–50
–60
–70
–80
–90
–100
10
2
08476-017
0
10
100
1k
频率（Hz）
10k
100
1k
10k
100k
频率（Hz）
1M
10M
100k
图19.电源抑制比与频率的关系，V
OUT
= 4.2 V, V
IN
= 5.2 V
图22.输出噪声频谱，V
IN
= 5 V
–10
–20
–30
–40
V
OUT
= 2.8V,
V
OUT
= 3.3V,
V
OUT
= 4.2V,
V
OUT
= 2.8V,
V
OUT
= 3.3V,
V
OUT
= 4.2V,
I
OUT
= 10毫安
I
OUT
= 10毫安
I
OUT
= 10毫安
I
OUT
= 500毫安
I
OUT
= 500毫安
I
OUT
= 500毫安
70
65
60
V
OUT
= 3.3V
55
V
OUT
= 4.2V
RMS噪声（ μV ）
PSRR （分贝）
50
45
40
35
V
OUT
= 2.8V
–50
–60
–70
–80
08476-018
–90
–100
10
25
20
0.001
100
1k
10k
100k
频率（Hz）
1M
10M
0.01
0.1
1
I
负载
（MA ）
10
100
1k
图20.电源抑制比与频率的关系，
各种输出电压和负载电流
图23.输出噪声与负载电流和输出电压，V
IN
= 5 V
–10
–20
–30
–40
V
IN
= 3.1V,
V
IN
= 3.3V,
V
IN
= 3.8V,
V
IN
= 4.8V,
I
OUT
= 10毫安
I
OUT
= 10毫安
I
OUT
= 10毫安
I
OUT
= 10毫安
I
OUT
1mA至500mA的负载电流STEP
1
PSRR （分贝）
–50
–60
2
V
OUT
–70
–80
–90
–100
10
100
1k
10k
100k
1M
频率（Hz）
V
IN
= 3.1V,
V
IN
= 3.3V,
V
IN
= 3.8V,
V
IN
= 4.8V,
I
OUT
= 500毫安
I
OUT
= 500毫安
I
OUT
= 500毫安
I
OUT
= 500毫安
08476-019
10M
CH1
500毫安Ω
BW
CH2 50.0mV
B
W
M40.0μs一个CH1
T
9.800%
200mA
图21.电源抑制比与电压裕量（V
IN
V
OUT
),
V
OUT
= 2.8 V
图24.负载瞬态响应，C
OUT
= 1 μF
版本C |第9页20
08476-022
V
IN
= 4V
V
OUT
= 3.3V
08476-021
V
IN
= V
OUT
+ 1V
V
纹波
= 50mV的
C
IN
= C
OUT
= 1F
30
08476-020
V
IN
= V
OUT
+ 1V
V
纹波
= 50mV的
C
IN
= C
OUT
= 1F
1
V
OUT
= 2.8V
