LP3907 Datasheet, PDF (14/58 Pages) National Semiconductor (TI) – Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface

LP3907
SNVS511S – JUNE 2007 – REVISED APRIL 2016
7.14 Typical Characteristics — Buck2
V_IN= 4.5 V to 5.5 V, T_A = 25°C, V_OUT = 1.8 V, 3.3 V
100
90
80
70
60
50
40
30
20
10
0.1
V_OUT = 1.8 V
V_IN= 4.5V
V_IN= 5.5V
1
10
100
OUTPUT CURRENT (mA)
L= 2.2 µH
1000
Figure 18. Efficiency vs Output Current (Forced PWM Mode)
100
90
80
V_IN= 4.5V
V_IN= 5.5V
70
60
50
40
0.1
V_OUT = 1.2 V
1
10
100
OUTPUT CURRENT (mA)
L= 2.2 µH
1000
Figure 20. Efficiency vs Output Current (PWM-to-PFM Mode)
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100
90
80
70
60
50
40
30
20
10
0.1
V_OUT = 3.3 V
V_IN= 4.5V
V_IN= 5.5V
1
10
100
OUTPUT CURRENT (mA)
L= 2.2 µH
1000
Figure 19. Efficiency vs Output Current (Forced PWM
Mode)
100
90
V_IN= 4.5V
80
V_IN= 5.5V
70
60
50
40
0.1
V_OUT = 2 V
1
10
100
OUTPUT CURRENT (mA)
L= 2.2 µH
1000
Figure 21. Efficiency vs Output Current (PWM-to-PFM Mode)
14
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