MB3883 Datasheet, PDF (35/39 Pages) Fujitsu Component Limited. – 6-ch DC/DC Converter IC With Synchronous Rectification for voltage step-up and step-down

MB3883
(Continued)
Conversion efficiency vs. load current
(CH5 : Up conversion method with synchronous rectification)
100
99
98
97
96
95
94
93
92
91
90
0
Ta = +25 °C
5 V output
VCC = VCC(O) = 5 V
Iin
Vin
To OUT5-1
L5
10 µH
F
Q10
D8
Vo5
(5.0 V)
Q9
C21 ^Q8
2.2 µF
IL
C12
C13
4.7 µF 2.2 µF
Vin = 2.5 V
Vin = 3 V
Vin = 3.6 V
Vin = 4.2 V
50
100
150
200
250
Load current IL (mA)
To OUT5-2
To SWOUT
300
η (%) = ^{Vo5 × IL} × 100
Vin × Iin
Note : The above application uses a constant of
Vin=2.5V, with settings made at maximum load.
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