MB39A119 Datasheet, PDF (31/53 Pages) Fujitsu Component Limited. – DC/DC Converter IC of Synchronous Rectification for charging Li-ion battery

MB39A119
■ I/O EQUIVALENT CIRCUIT
• Reference voltage block
VCC 1
1.25 V ⁺
−
ESD protection
element
GND 20
124.53
kΩ
41.47
kΩ
19 VREF
ESD protection
element
• Bias voltage block
VCC
2.5 V
200 kΩ
25 VB
GND
200 kΩ
• Triangular wave oscillator block
VCC
VREF
(5.0 V)
1.08 V ⁺
−
GND
18 RT
• Error amplifier block (Error Amp2)
VCC
(3.1 V)
−INE2 13
FB123
GND
12 +INE2
• Control block
CTL 21
GND
132.4
kΩ
204
kΩ
• Soft-start block
VCC
VREF
(5.0 V)
17 CS
GND
• Error amplifier block (Error Amp1)
VCC
(3.1 V)
CS
−INE1 8
14 ^FB123
1MΩ
GND
7 +INE1
• Error amplifier block (Error Amp3)
VCC
(3.1 V)
−INE3 15
4.2 V
FB123
GND
(Continued)
31