MB39A106 Datasheet, PDF (3/46 Pages) Fujitsu Component Limited. – 2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type

MB39A106
■ PIN DESCRIPTION
Pin No. Symbol
I/O
1
−INE1
I
2
FB1
O
3
CS1
⎯
4
NC
⎯
5
RT
⎯
6
CTL
I
7
SGND
⎯
8
VREF
O
9
CTL1
I
10
CTL2
I
11
CSCP
⎯
12 PWRGOOD O
13
CS2
⎯
14
FB2
O
15
−INE2
I
16
CB2
⎯
17
OUT1-2
O
18
VS2
⎯
19
OUT2-2
O
20
PGND2
⎯
21
NC
⎯
22
VB
O
23
ILIM2
I
24
VCC
⎯
25
ILIM1
I
26
PGND1
⎯
27
OUT2-1
O
28
VS1
⎯
29
OUT1-1
O
30
CB1
⎯
Descriptions
CH1 error amp inverted input terminal
CH1 error amp output terminal
CH1 soft-start capacitor connection terminal
No connection
Triangular waveform oscillation frequency setting resistor connection
terminal
Power supply control terminal
“H” level : IC operating mode
“L” level : IC Standby mode
Ground terminal
Reference voltage output terminal
CH1 control terminal
“H” level : CH1 ON state
“L” level : CH1 OFF state and protection status reset
CH2 control terminal
“H” level : CH2 ON state
“L” level : CH2 OFF state and protection status reset
Timer-latch short-circuit protection capacitor connection terminal
CH1, CH2 protection status output terminal
CH2 soft-start capacitor connection terminal
CH2 error amp output terminal
CH2 error amp inverted input terminal
CH2 boot capacitor connection terminal
Connect a capacitor between the CB2 and VS2 terminals.
CH2 totem-pole output terminal (External main-side FET gate drive)
CH2 external main-side FET source connection terminal
CH2 totem-pole output terminal (External synchronous-rectification-side FET
gate drive)
Ground terminal
No connection
Output circuit bias output terminal
CH2 overcurrent detection resistor connection terminal
Reference voltage, control circuit power supply terminal
CH1 overcurrent detection resistor connection terminal
Ground terminal
CH1 totem-pole output terminal (External synchronous-rectification-side FET
gate drive)
CH1 external main-side FET source connection terminal
CH1 totem-pole output terminal (External main-side FET gate drive)
CH1 boot capacitor connection terminal
Connect a capacitor between the CB1 and VS1 terminals.
3