MB3886 Fujitsu Microelectronics, Inc., MB3886 Datasheet - Page 3

• Manufacturer Part Number: MB3886
• Description: 2-channel Dc/dc Converter Ic With Overcurrent Protection Symmetrical-phase Type
• Manufacturer: Fujitsu Microelectronics, Inc.

Pin No. Pin name I/O
PIN DESCRIPTION
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
2
3
4
5
6
7
8
9
OUT1-1
OUT2-1
OUT2-2
OUT1-2
PSIG1
SGND
PGND
PSIG2
CSCP
VREF
CTL1
ILIM1
ILIM2
CTL2
VCC
CS1
CB1
CB2
CS2
FB1
VS1
VS2
FB2
INE1
INC1
INC2
INE2
CT
RT
VB
O
O
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
CH1 protection status output terminal
CH1 control terminal
“H” level : CH1 ON state
“L” level : CH1 OFF state and protection status reset
CH1 overcurrent detection resistor connection terminal
Triangular waveform oscillation frequency setting capacitor connection terminal
Triangular waveform oscillation frequency setting resistor connection terminal
Ground terminal
CH1 soft-start capacitor connection terminal
CH1 error amp. inverting input terminal
CH1 error amp. output terminal
CH1 overvoltage comparator noninverting input terminal
CH1 totem-pole output terminal (External main-side FET gate drive)
CH1 external main-side FET source connection terminal
CH1 boot capacitor connection terminal
Connect a capacitor between the CB1 and VS1 terminals.
CH1 totem-pole output terminal (External synchronous-rectification-side FET gate
drive)
Ground terminal
Output circuit bias output terminal
CH2 totem-pole output terminal (External synchronous-rectification-side FET gate
drive)
CH2 boot capacitor connection terminal
Connect a capacitor between the CB2 and VS2 terminals.
CH2 external main-side FET source connection terminal
CH2 totem-pole output terminal (External main-side FET gate drive)
CH2 overvoltage comparator noninverting input terminal
CH2 error amp. output terminal
CH2 error amp. inverting input terminal
CH2 soft-start capacitor connection terminal
Timer-latch short-circuit protection capacitor connection terminal
Reference voltage, control circuit power supply terminal
Reference voltage output terminal
CH2 overcurrent detection resistor connection terminal
CH2 control terminal
“H” level : CH2 ON state
“L” level : CH2 OFF state and protection status reset
CH2 protection status output terminal
Description
MB3886
3