Datasheet

0
10
20
30
40
50
60
70
80
90
100
0.01 0.1 1
I -OutputCurrent- A
O
V =3V
I
V =3.6V
I
V =4.2V
I
V =5V
I
V =2.5V
I
Efficiency-%
0.0010.00010.00001
V =2.05V
O
0
10
20
30
40
50
60
70
80
90
100
Efficiency-%
0.01 0.1 1
I -OutputCurrent- A
O
0.0010.00010.00001
V =3V
I
V =3.6V
I
V =4.2V
I
V =5V
I
V =2.5V
I
V =2.05V
O
0
10
20
30
40
50
60
70
80
90
100
Efficiency-%
0.01 0.1 1
I -OutputCurrent- A
O
0.0010.00010.00001
V =3V
I
V =3.6V
I
V =4.5V
I
V =5V
I
V =2.5V
I
V =2.05V
O
0
10
20
30
40
50
60
70
80
90
100
Efficiency-%
0.01 0.1 1
I -OutputCurrent- A
O
0.0010.00010.00001
V =3V
I
V =3.6V
I
V =4.2V
I
V =5V
I
V =2.5V
I
V =2.05V
O
TPS65720
TPS65721
www.ti.com SLVS979 –OCTOBER 2009
TYPICAL CHARACTERISTICS (continued)
FIGURE
Output voltage ripple in PWM mode; DCDC1 Scope plot: Vi = 3.6V Figure 14
Vo = 2.05V;
Io = 60mA (PWM)
Startup DCDC1 and LDO1 Scope plot using TPS65720 (battery Figure 15
powered) for
/PB_IN; Vo_DCDC1; Vo_LDO1
Load transient response LDO1 Scope plot; V = 1.85V; Vi = 2.05V Figure 16
I = 50 μA to 60mA to 50 μA
Line transient response LDO1 Scope plot; Vo = 1.85V; Vi = 5V to 3.6V Figure 17
to 5V
Kset vs Riset Figure 18–Figure 21
Efficiency vs Lout for DCDC1=2.05V, LDO1=1.85V, Figure 22
VinLDO=VDCDC1
TPS65720 Efficiency of DCDC1 TPS65720 Efficiency of DCDC1
vs vs
Load Current; PWM Mode; inductor: LQM21P 3.3uH Load Current; PFM Mode; inductor: LQM21P 3.3uH
Figure 1. Figure 2.
TPS65720 Efficiency of DCDC1 TPS65720 Efficiency of DCDC1
vs vs
Load Current; PWM Mode; inductor: MIPSA2520 2.2uH Load Current; PFM Mode; inductor: MIPSA2520 2.2uH
Figure 3. Figure 4.
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