MB3889 Datasheet, PDF (19/35 Pages) Fujitsu Component Limited. – 2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type

MB3889
R1
−INE1
1
(CS2) ₁₃
3
CS1
R2
VREF
3 µA
L priority
Error Amp
−
+
+
1.23 V
CTL2
CTL1
Open : CH ON
L : CH OFF
VTH = 1.4 V
100 KΩ
10
Buff
A _{SW1 (SW2)}
9
B
CTL1 = H
6 kΩ
Soft-start
Discharge
<Soft-start circuit>
s TREATMENT OF UNUSED CS TERMINALS
When the soft-start function is not used, the CS1 terminal (pin 3) and CS2 terminal (pin 13) should be left open.
3 CS1
13 CS2
< Operation Without Soft-start Setting >
19