MB39A125 Datasheet, PDF (43/64 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging Li-ion Battery

MB39A125/126
■ I/O EQUIVALENT CIRCUIT
• <Reference voltage block>
VCC 21
ESD
protection
element
1.235 V ₊
−
37.8
kΩ
GND 23
12.35
kΩ
• <Power supply control block>
CTL 14
6 VREF
33.1
kΩ
ESD
protection
element
51
kΩ
GND
• <Soft-start block>
• <Triangular wave
oscillator block>
VREF
(5.0 V)
VCC
VREF
(5.0 V)
22 CS
+
−
• <Error amplifier block (Error Amp1) >
VCC
−INE1 8
17 RT
GND
GND
GND
9 +INE1
FB123
• <Error amplifier block (Error Amp2) >
VCC
−INE2 4
• <Error amplifier block (Error Amp3) >
VCC
VREF
(5.0 V)
CS
FB123
16
4.2 V
15 FB123
GND
3 +INE2
• <Current detection amplifier block
(Current Amp1) >
VCC
GND
• <Current detection amplifier block
(Current Amp2) >
VCC
−INC1 12
GND
13 +INC1
−INC2 1
10 _OUTC1
GND
2 _OUTC2
24 +INC2
(Continued)
43