LP3913 Datasheet, PDF (23/70 Pages) Texas Instruments – Power Management IC for Flash Memory-Based Portable Media Players

LP3913
www.ti.com
SNVS489I – NOVEMBER 2006 – REVISED SEPTEMBER 2013
100 .00
TYPICAL PERFORMANCE CHARACTERISTICS - BUCK3
T_A = 25°C unless otherwise noted
Efficiency vs. VIN
ILOAD= 100mA
Forced PWM Efficiency vs ILOAD
VOUT = 3.3V
100. 0
95.00
90.00
85.00
V_OUT = 3.3V
80.00
75.00
V_OUT = 1.8V
70.00
65.00
60.00
2.5 3.0 3.5 4.0 4.5 5.0 5.5
V_IN (V)
Figure 45.
80. 0
60. 0
40. 0
20. 0
V_BATT = 3.3V
V_BATT = 4.2V
0. 0
0.1
1
10
100
OUTPUT CURRENT (mA)
Figure 46.
1000
AutoMode Efficiency vs. ILOAD
VOUT = 3.3V
100 .00
VIN = 4.2V
90.00
AutoMode Efficiency vs. ILOAD
VOUT = 1.8V
100 .00
90.00
V_IN = 4.2V
80.00
70.00
VIN = 3.6V
80.00
70.00
V_IN = 3.6V
60.00
50.00
0.1
1
10
100
OUTPUT CURRENT (mA)
Figure 47.
1000
Buck3 Load Transient Response
VIN = 4.2V, VOUT = 3.3V,
ILOAD = 0-100mA (PFM Mode)
60.00
50.00
0.1
1
10
100
OUTPUT CURRENT (mA)
Figure 48.
1000
Buck3 Load Transient Response
VIN = 3.6V, VOUT = 3.3V
ILOAD = 150-250mA (PWM Mode)
Figure 49.
Figure 50.
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