LP3913 Datasheet, PDF (20/70 Pages) Texas Instruments – Power Management IC for Flash Memory-Based Portable Media Players

LP3913
SNVS489I – NOVEMBER 2006 – REVISED SEPTEMBER 2013
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TYPICAL PERFORMANCE CHARACTERISTICS - BUCK (continued)
T_A = 25°C unless otherwise noted
Buck 1 Efficiency vs. Output Current
(PFM to PWM mode, Vout =1.2V, L= 2.2µH)
85.0
Vin = 3.2V
80.0
Vin = 4V
Buck 1 Efficiency vs. Output Current
(PFM to PWM mode, Vout =2.0V, L= 2.2µH)
95.0
Vin = 3.2V
90.0
Vin = 4V
75.0 _{Vin = 5V}
85.0 _{Vin = 5V}
70.0
80.0
65.0
75.0
60.0
70.0
55.0
65.0
50.0
60.0
45.0
55.0
40.0
0.1
1.0
10
100
OUTPUT CURRENT (mA)
Figure 29.
1000
50.0
0.1
1.0
10
100
OUTPUT CURRENT (mA)
Figure 30.
1000
Buck 2 Efficiency vs. Output Current
(Forced PWM Mode, Vout =1.8V, L= 2.2µH)
90.0
Vin = 3.6V
80.0
Vin = 4V
70.0
Vin = 5V
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.1
1.0
10
100
OUTPUT CURRENT (mA)
Figure 31.
1000
Buck 2 Efficiency vs. Output Current
(Forced PWM Mode, Vout =3.3V, L= 2.2µH)
100.0
Vin = 3.6V
90.0
Vin = 4V
80.0
70.0 _{Vin = 5V}
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.1
1.0
10
100
OUTPUT CURRENT (mA)
Figure 32.
1000
Buck 2 Efficiency vs. Output Current
(PFM to PWM Mode, Vout =1.8V, L= 2.2µH)
95. 0
Vin = 3.6V
90. 0
Vin = 4V
85.0 _{Vin = 5V}
80. 0
75. 0
70. 0
65. 0
60. 0
55. 0
50. 0
0.1
1.0
10
100
OUTPUT CURRENT (mA)
Figure 33.
1000
Buck 2 Efficiency vs. Output Current
(PFM to PWM Mode, Vout =3.3V, L= 2.2µH)
100 .00
VIN = 2. 7V
90.00
80.00
70.00
60.00
V_IN = 4.2V
V_IN = 3.6V
50.00
0.1
1.0
10
100
OUTPUT CURRENT (mA)
Figure 34.
1000
20
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