MB3881 Datasheet, PDF (37/40 Pages) Fujitsu Component Limited. – 8-ch DC/DC Converter IC with Synchronous Rectifier for Voltage Step-up and Step-down

MB3881
(Continued)
Conversion efficiency vs. load current
(CH3 : Zeta method )
90
88
86
84
82
80
To VDD (O)
To OUT3
Iin
Vin
R3
75 Ω
C17
3900 pF
Q3
C11
2.2 µF
C
L6
VO3
(5.0 V)
15 µH
L5
IL
C39 6.8 µH
C3
1 µF
D3 2.2 µF
78
76
74
Ta = +25 °C
5 V ouputt
72
VCC (O) = Vin + 2.2 V
VSS (O) = Vin − 1.8 V
70
0 50 100 150 200 250 300 350 400 450 500
Load current IL (mA)
Vin = 2.5 V
Vin = 3 V
Vin = 3.6 V
Vin = 4.2 V
Vin = 6 V
η = ^{VO3 × IL} × 100 (%)
Vin × Iin
37