FUNCTIONAL DEVICE OPERATION
SUPPLIES
SW1 PFM mode Efficiency Vout = 0,725 V
100%
90%
80%
70%
60%
Vin = 2, 80 0 V
Vin = 3, 60 0 V
Vin = 4, 65 0 V
50%
40%
30%
20%
10%
0%
0
0
0
5
5
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Il oad (m A)
SW2 PFM mode Efficiency Vout = 1.250 V
100%
90%
80%
70%
60%
50%
40%
Vin = 2, 80 0 V
Vin = 3, 60 0 V
Vin = 4, 65 0 V
30%
20%
10%
0%
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Il oad (m A)
SW4 PFM mode Efficiency Vout = 1.800 V
100%
90%
80%
70%
60%
Vin = 2, 80 0 V
50%
40%
30%
20%
10%
0%
Vin = 3, 60 0 V
Vin = 4, 65 0 V
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Il oad (m A)
Figure 17. Buck Switcher PFM Efficiency
13892
Analog Integrated Circuit Device Data
Freescale Semiconductor
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