Production Data
WM8352
EFFICIENCY vs LOAD
DCDC2
100
90
80
70
60
50
V
IN = 3.1V
VIN = 3.7V
VIN = 4.2V
ACTIVE
VOUT = 5.0V
40
0.001
0.01
0.1
1
LOAD (A)
Figure 5 DC-DC2 Efficiency Vs Load Current Vo=5V
9.2.2
OUTPUT VOLTAGE REGULATION
O UT PUT VO LT AG E
vs
OUTPUT VOLTAGE
vs
LO AD CURRENT
INPUT VOLTAG E
1.800
1.795
1.790
1.785
1.780
1.835
1.830
1.825
1.820
1.815
1.810
Vo= 1.8V
Vi
= 3.7V
Vo= 1.8V
Io 0.5A
=
0.0
0.1
0.2
0.3
0.4
0.5
2.7
3.2
3.7
4.2
VI (V)
4.7
5.2
IO (A)
Figure 6 DC-DC1 Output Voltage Vs Output Current
Figure 7 DC-DC1 Output Voltage Vs Input Voltage
PD, February 2011, Rev 4.4
29
w