LP3907-Q1 Datasheet, PDF (13/53 Pages) Texas Instruments – Dual High-Current Step-Down DC-DC And Dual Linear Regulator

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Typical Characteristics — Buck2 (continued)
V_IN= 4.5 V to 5.5 V, T_A = 25°C, V_OUT = 1.8 V, 3.3 V
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)
7.15 Typical Characteristics — Bucks
V_IN= 3.6 V, T_A = 25°C, V_OUT = 1.2 V unless otherwise noted.
LP3907-Q1
SNVSA55A – DECEMBER 2014 – REVISED MAY 2015
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)
V_OUT = 1.2 V
I_LOAD = 300 to 500 mA
Figure 22. Load Transient Response (PWM Mode)
V_OUT = 1.2 V
I_LOAD = 50 to 150 mA
Figure 23. Mode Change By Load Transient (PFM-to-PWM
Mode)
V_IN = 3.6 to 4.2 V
V_OUT = 1.2 V
250-mA Load
Figure 24. Line Transient Response
V_IN = 3.6 to 4.2 V
V_OUT = 3.3 V
250-mA Load
Figure 25. Line Transient Response
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