MB3827 Datasheet, PDF (38/41 Pages) Fujitsu Component Limited. – 6-ch DC/DC Converter IC With Synchronous Rectification for voltage step-up and step-down

MB3827
s REFERENCE DATA
Efficiency vs. load current (ch1, step-up/step-down switching method)
100
5V output
Iin
Vin = 4.2 V _{Vin = 6 V}
Vin
90
to OUT1-1
Vin = 3 V
Vin = 3.6 V
80
Vin = 2.5 V
to OUT1-2
Vo1
(5 V)
A
22 µH
IL
4.7 µF
70
to OUT1-3
to OUT1-4
60
50
0 50 100 150 200 250 300 350 400 450 500
Load current IL (mA)
η=
Vo1 × IL
Vin × Iin
× 100 (%)
Efficiency vs. load current (ch2, Zeta Method with Synchronous Rectification)
100
5V output
90
Vin = 4.2 V _{Vin = 6 V}
Vo2
80
(5 V)
Iin
4.7 µF ^B
Vin = 3 V
Vin
22 µH
70
Vin = 3.6 V
Vin = 2.5 V
to OUT2-1
22 µH
IL
4.7 µF
60
to OUT2-2
50
0 50 100 150 200 250 300 350 400 450 500
Load current IL (mA)
η=
Vo2 × IL
Vin × Iin
× 100 (%)
38