Datasheet

FUNCTIONAL DEVICE OPERATION
SUPPLIES
Analog Integrated Circuit Device Data
Freescale Semiconductor 77
MC13892
Figure 18. Buck Regulator PWM (No Pulse Skipping) Efficiency
SW1 P WM No Pulse Skipp ing mode Efficien cy Vout = 0,725 V
0%
10 %
20 %
30 %
40 %
50 %
60 %
70 %
80 %
90 %
100 %
0 10203040 5060 7080 90100
Ilo a d (mA)
Effic iency (%
)
V in = 3 ,00 0 V
V in = 3 ,60 0 V
V in = 4 ,65 0 V
SW4 P WM No Pulse Skipping mode Efficien cy Vout = 1.800 V
0%
10 %
20 %
30 %
40 %
50 %
60 %
70 %
80 %
90 %
100 %
0 50 1 00 1 50 20 0 2 50 30 0 35 0 400 450 5 00 5 50 60 0 65 0 700 750 8 00 850 9 00
Il oa d (m A)
Effic iency (%)
V in = 3,0 00 V
V in = 3,6 00 V
V in = 4,6 50 V
SW2 P WM No Pulse Skipp ing mode Efficien cy Vout = 1.250 V
0%
10 %
20 %
30 %
40 %
50 %
60 %
70 %
80 %
90 %
100 %
0 10203040 5060 7080 90100
Ilo a d (mA)
E f fic ien cy (% )
V in = 3 ,00 0 V
V in = 3 ,60 0 V
V in = 4 ,65 0 V
SW2 P WM No Pulse Skipping mode Efficien cy Vout = 1.250 V
0%
10 %
20 %
30 %
40 %
50 %
60 %
70 %
80 %
90 %
100 %
0 50 1 00 1 50 20 0 2 50 30 0 35 0 400 450 5 00 5 50 60 0 65 0 700 750 8 00 850 9 00
Il oa d (m A)
E f fic ien cy (%
)
V in = 3,0 00 V
V in = 3,6 00 V
V in = 4,6 50 V
SW4 P WM No Pulse Skipp ing mode Efficien cy Vout = 1.800 V
0%
10 %
20 %
30 %
40 %
50 %
60 %
70 %
80 %
90 %
100 %
0 10203040 5060 7080 90100
Ilo a d (mA)
E f fic ien cy (% )
V in = 3 ,00 0 V
V in = 3 ,60 0 V
V in = 4 ,65 0 V
SW4 P WM No Pulse Skipping mode Efficien cy Vout = 1.800 V
0%
10 %
20 %
30 %
40 %
50 %
60 %
70 %
80 %
90 %
100 %
0 50 1 00 1 50 20 0 2 50 30 0 35 0 400 450 5 00 5 50 60 0 65 0 700 750 8 00 850 9 00
Il oa d (m A)
E f fic ien cy (%
)
V in = 3,0 00 V
V in = 3,6 00 V
V in = 4,6 50 V