LP3907_14 Datasheet, PDF (17/57 Pages) Texas Instruments – Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C-Compatible Interface

LP3907
www.ti.com
SNVS511N – JUNE 2007 – REVISED AUGUST 2011
Typical Performance Characteristics — Buck1
V_IN= 2.8V to 5.5V, T_A = 25°C, V_OUT = 1.2V, 2.0V
Efficiency
Efficiency
vs
vs
Output Current
Output Current
(V_OUT =1.2V, L= 2.2µH —(Forced PWM mode)
(V_OUT =2.0V, L= 2.2µH — Forced PWM mode)
100
90
100
90
80
V_IN = 2.8V
70
60
50
40
V_IN = 3.6V
30
20
10
V_IN = 5.5V
80
V_IN = 2.8V
70
60
50
V_IN = 3.6V
40
30
V_IN = 5.5V
20
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
Efficiency
vs
Output Current
(V_OUT =1.2V, L= 2.2µH — PWM mode to PFM mode)
100
10
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
Efficiency
vs
Output Current
(V_OUT =2.0V, L= 2.2µH — PWM mode to PFM mode)
90
80
V_IN = 2.8V
V_IN = 3.6V
70
V_IN = 5.5V
60
50
100
90
V_IN = 2.8V
80
V_IN = 3.6V
V_IN = 5.5V
70
60
50
40
40
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
0.1
1
10
100
OUTPUT CURRENT (mA)
1000
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