LP3913 Datasheet, PDF (19/70 Pages) Texas Instruments – Power Management IC for Flash Memory-Based Portable Media Players

LP3913
www.ti.com
SNVS489I – NOVEMBER 2006 – REVISED SEPTEMBER 2013
TYPICAL PERFORMANCE CHARACTERISTICS - BUCK
T_A = 25°C unless otherwise noted
Output Voltage vs. Supply Voltage
(Vout = 3.3 V)
3.35
I_OUT = 20 mA
3.33
3.31
I OUT = 600 mA
Output Voltage vs. Supply Voltage
(Vout = 2.0 V)
2.05
2.04
I_OUT = 600 mA
I_OUT = 300 mA
2.03 ^IOUT ^{= 20 mA}
3.29
3.27
I _OUT = 300 mA
3.25
4.0
4.3
4.6
4. 9
5.2
5.5
SUPPLY VOLTAGE (V)
Figure 23.
2.02
2.01
2.00
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
Figure 24.
Output Voltage vs. Supply Voltage
(Vout = 1.2V)
1.25
Output Voltage vs. Supply Voltage
(Vout = 0.8V)
0. 825
1.24
I_OUT = 600 mA
I_OUT = 300 mA
1.23
I_OUT = 20 mA
1.22
1.21
1.20
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
Figure 25.
Buck 1 Efficiency vs. Output Current
(Forced PWM Mode, Vout =1.2V, L= 2.2µH)
90. 0
Vin = 3.2V
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 27.
1000
0. 820
0. 815
0. 810
0. 805
IOUT = 600 mA
I_OUT = 300 mA
I_OUT = 20 mA
0. 800
3.0
3.5
4. 0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
Figure 26.
Buck 1 Efficiency vs. Output Current
(Forced PWM Mode, Vout =2.0V, L= 2.2µH)
100 .0
90.0
Vin = 3.2V
Vin = 4V
80.0
Vin = 5V
70.0
60 0
.
50.0
40.0
30.0
20.0
10.0
0.0
0. 1
1. 0
10
100
OUTPUT CURRENT (mA)
Figure 28.
1000
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