AME8821_08 Datasheet, PDF (9/15 Pages) Analog Microelectronics – 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application

AME
AME8821
250mA Hi-PSRR, Low-Quiescent LDO
with In-Rush Current Control
For USB Application
Output Voltage vs Load Current
3.310
3.305
3.300
V_IN = 4.3V
T_A = 25^oC
3.295
3.290
3.285
3.280
3.275
3.270
3.265
3.260
0 15 30 45 60 75 90 105 120135150165 180195 210225 240
Load Current (mA)
Quiescent Current vs Temperature
30
I_OUT = 250mA
25
20
I_OUT = 1mA
15
10
5 _{VIN = 4.3V}
0-40 _{-25 -10 5 20 35 50 65 80 95 110 125}
Temperature (^oC)
Dropout Voltage vs. Temperature
400
350
V_IN = 4.3V
I_OUT = 250mA
300
250
200
150
100
50
0
-40 -25 -10
5
20
35 50
65 80 95 110 125
Temperature (^oC)
Output Spectral Noise Density vs. Frequency
400
V_IN=4.3V
C_OUT=4.7µF
300
C_(SR)=0.47µF
200
I_OUT = 250mA
100
I_OUT =1mA
0
100
1000
10000
Frequency (Hz)
100000
Output Impedance vs. Frequency
2.0
1.8
V_IN = 4.3V
1.6
C_OUT = 4.7µF
1.4
1.2
1.0
0.8
0.6
I_OUT = 250mA
0.4
0.2
I_OUT = 50mA
0
10
100
1000
10000
100000 1000000
Frequency (Hz)
Rev.A.04
Power Supply Ripple Rejection Ratio
100
90
80
70
I_OUT = 250mA
V_IN = 4.3V
V_OUT = 3.3V
C_OUT = 4.7µF
C_(SR) = 0.47µF
60
50
I_OUT = 1mA
40
30
20
10
0
10
100
1000
10000
100000 1000000
Frequency (Hz)
9