MB3881 Datasheet, PDF (9/40 Pages) Fujitsu Component Limited. – 8-ch DC/DC Converter IC with Synchronous Rectifier for Voltage Step-up and Step-down

MB3881
s ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Condition
Rating
Unit
Min.
Max.
VCC

Power supply voltage
VDD


17
V

17
V
Output current
IO
OUT pin

20
mA
Output peak current
IO
OUT pin, Duty ≤ 5%

200
mA
Power dissipation
PD
Ta ≤ +25 °C

800*
mW
Storage temperature
Tstg

−55
+125
°C
* : The packages are mounted on the epoxy board (10 cm × 10 cm).
WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current,
temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.
s RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Condition
Min.
Value
Unit
Typ. Max.
Power supply voltage
CH8
VCC _{CH1 to CH7,}
4 V ≤ VCC(O)−VSS(O) ≤ 9 V
1.8
9
4
9
13
V
13
V
VDD CH1
4
5
9
V
Reference voltage output current IOR VREF pin
−1

0 mA
Reference voltage output current IB VB pin
−0.5 
0 mA
Input voltage
+IN5, +IN6, −IN1 to −IN7,
−IN5 (C) , −IN6 (C) , OVP pin
0
VIN _{+IN8, −IN8, −IN8 (C) , +IN8 (C) pin 0}
 VCC − 1.8 V
 VCC − 0.9 V
+IN7 pin
0.1
 VCC − 1.8 V
Control input voltage
VCTL CTL pin
0

VCC
V
SYNC input voltage
VSYNC SYNC pin
0

VCC
V
Output current
IO OUT pin
1
2
15 mA
Output current setting resister
RB RB8 pin
2.4
24
51 kΩ
Oscillator frequency
fOSC

100 500
800 kHz
Timing capacitor
CT

47
100
680 pF
Timing resistor
RT

6.8
11
51 kΩ
VB pin capacitor
CVB

0.22 0.39
 µF
Soft-start capacitor
CS


0.1
1.0 µF
Short detection capacitor
CSCP


0.1
1.0 µF
Operating ambient temperature Ta

−30 +25
+85 °C
WARNING: The recommended operating conditions are required in order to ensure the normal operation of the
semiconductor device. All of the device’s electrical characteristics are warranted when the device is
operated within these ranges.
Always use semiconductor devices within their recommended operating condition ranges. Operation
outside these ranges may adversely affect reliability and could result in device failure.
No warranty is made with respect to uses, operating conditions, or combinations not represented on
the data sheet. Users considering application outside the listed conditions are advised to contact their
FUJITSU representatives beforehand.
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