NCP5661 Datasheet, PDF (7/12 Pages) ON Semiconductor – Low Output Voltage,Ultra-Fast 1.0 A Low Dropout Linear Regulator with Enable

NCP5661
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
T_A = 25°C
L = 25 mm Copper
2 4 6 8 10 12 14 16 20
INPUT−OUTPUT VOLTAGE DIFFERENTIAL (V)
Figure 9. Output Current vs. Input−Output
Voltage Differential
90
80
70
I_out = 10 mA
60
50
40
30
20
10
0
0
V_in = 4.0 V
V_out = 0.9 V
C_in = 0 mF
C_out = 1.0 mF
T_J = 25°C
I_out = 1.0 A
1
10
100
F, FREQUENCY (kHz)
1000
Figure 10. Ripple Rejection vs. Frequency
100
90
80
70
60
50
40
30
20
10
0
Start: 100 Hz
V_in = 3.3 V
V_out = 0.9 V
I_out = 10 mA
C_in = 150 mF
C_out = 150 mF
T_J = 25°C
Stop: 100 kHz
F, FREQUENCY (kHz)
Figure 11. Noise Density vs. Frequency
100
90
80
70
60
50
40
30
20
10
0
Start: 100 Hz
V_in = 3.3 V
V_out = 0.9 V
I_out = 1.0 A
C_in = 150 mF
C_out = 150 mF
T_J = 25°C
Stop: 100 kHz
F, FREQUENCY (kHz)
Figure 12. Noise Density vs. Frequency
1000
100
10
1.0
0.10
10 mF
Unstable
100 mF
150 mF
Stable
1000
100
10
1.0
0.10
150 mF
Unstable
100 mF
10 mF
Stable
0.01
0
100 200 300 400 500 600 700 800 900 1000
OUTPUT CURRENT (mA)
Figure 13. 1.2 Volt Output Stability with Output
Capacitor ESR
0.01
0
100 200 300 400 500 600 700 800 900 1000
OUTPUT CURRENT (mA)
Figure 14. 3.3 Volt Output Stability with Output
Capacitor ESR
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