MB39A106 Datasheet, PDF (26/46 Pages) Fujitsu Component Limited. – 2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type

MB39A106
■ I/O EQUIVALENT CIRCUIT
<Reference voltage block>
< Control block>
VCC 24
ESD
Protection
Element
1.23 V +
−
46.6 kΩ
24.6 kΩ
SGND 7
< Soft-start block>
VREF
(3.5 V)
ESD
Protection
Element
8 VREF
ESD
Protection
Element
CTL ⁶
67 kΩ
104 kΩ
SGND
< Short-circuit protection
circuit block>
400 Ω
CSX
VREF
(3.5 V)
2 kΩ
11 CSCP
< Channel control block>
VREF
(3.5 V)
CTLX
100 kΩ
2 kΩ
SGND
< Triangular wave oscillator
block (RT) >
VREF
(3.5 V)
1.40 V +
−
5 RT
SGND
SGND
< Overcurrent protection circuit block (CH1, CH2) >
VCC
ILIMX
VSX
SGND
< Protection status output circuit block>
VREF
(3.5 V)
12 PWRGOOD
SGND
< Error amplifier block (CH1, CH2) >
VCC
VREF
(3.5 V)
-INEX
CSX
1.23 V
FBX
SGND
< Output block main side>
VB 22
35 kΩ
CBX
OUT1-X
SGND
< Output block synchronous rectification side (CH1, CH2) >
VB
35 kΩ
SGND
100 kΩ
VSX
GND
26
OUT2-X
100 kΩ
PGNDX
X : Each channel No.