MB3889 Datasheet, PDF (7/35 Pages) Fujitsu Component Limited. – 2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type

MB3889
s RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Condition
Value
Unit
Min
Typ
Max
Power-supply voltage
VCC

5.5
12
18
V
Boot voltage
VCB CB terminal


23
V
Reference voltage output current IOR VREF terminal
−1

0
mA
Bias output current
IOB VB terminal
−1

0
mA
VIN −INE terminal
0

VCC − 1.8 V
Input voltage
CTL1, CTL2 terminal
0
VCTL
CTL terminal
0

VREF
V

VCC
V
Output voltage
VPG PWRGOOD terminal
0

15
V
Output current
IO

− 100

100
mA
Peak output current
IOP
Duty ≤ 5%
(t = 1 / fOSC × Duty)
− 700

700
mA
Oscillation frequency
fOSC

100
300
500
kHz
Timing resistor
RT

30
47
130
kΩ
Boot capacitor
CB


0.1
1.0
µF
Reference voltage output
capacitor
CREF VREF terminal

0.1
1.0
µF
Bias output capacitor
CVB VB terminal
1.0
4.7
10
µF
Soft-start capacitor
CS


0.1
1
µF
Short-circuit detection capacitor CSCP


0.01
1
µF
Overcurrent detection setting
resistor
RLIM

0.1
1
10
kΩ
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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