mb3881pff Fujitsu Microelectronics, Inc., mb3881pff Datasheet - Page 36

• Manufacturer Part Number: mb3881pff
• Description: 8-ch Dc/dc Converter Ic With Synchronous Rectifier For Voltage Step-up And Step-down
• Manufacturer: Fujitsu Microelectronics, Inc.

36
MB3881
REFERENCE DATA
(CH1 : Down conversion method with synchronous rectification)
95
94
93
92
91
90
89
88
87
86
85
90
88
86
84
82
80
78
76
74
72
70
0
(CH2 : Zeta method with synchronous rectification)
0
50 100 150 200 250 300 350 400 450 500
50 100 150 200 250 300 350 400 450 500
Conversion efficiency vs. load current
Conversion efficiency vs. load current
Load current IL (mA)
Load current IL (mA)
Ta
2 V output
VCC (O)
VSS (O)
Ta
2.8 V output
VCC (O)
VSS (O)
25 C
25 C
Vin
Vin
Vin
Vin 2.2 V
1.8 V
2.2 V
1.8 V
To OUT2-1
To OUT2-2
To OUT1-1
To OUT1-2
Vin
Vin
Vin
Vin
Vin
Vin
Vin
Vin
Vin
Vin
2.5 V
3 V
3.6 V
4.2 V
6 V
2.5 V
3 V
3.6 V
4.2 V
6 V
R1
240
C15
2200 pF
R2
75
C16
3900 pF
Vin
Vin
1 F
Iin
C38
Iin
1 F
C37
Q1
15 H
Q2
L3
C10
=
Q10
=
Q9
2.2 F
V
Vin
V
Vin
O
D1
O
D2
1
2
A
B
33 H
2.2 F
Iin
15 H
2.2 F
IL
Iin
IL
L2
C1
L4
C2
(Continued)
V
(2.0 V)
100 (%)
V
(2.8 V)
100 (%)
O
O
1
2
IL
IL