MB3889 Fujitsu Microelectronics, Inc., MB3889 Datasheet - Page 7

• Manufacturer Part Number: MB3889
• Description: 2-channel Dc/dc Converter Ic With Overcurrent Protection Symmetrical-phase Type
• Manufacturer: Fujitsu Microelectronics, Inc.

WARNING: The recommended operating conditions are required in order to ensure the normal operation of the
Power-supply voltage
Boot voltage
Reference voltage output current
Bias output current
Input voltage
Output voltage
Output current
Peak output current
Oscillation frequency
Timing resistor
Boot capacitor
Reference voltage output
capacitor
Bias output capacitor
Soft-start capacitor
Short-circuit detection capacitor
Overcurrent detection setting
resistor
Operating ambient temperature
RECOMMENDED OPERATING CONDITIONS
Parameter
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.
Symbol
C
C
V
R
V
V
f
C
V
V
I
I
I
C
Ta
OSC
R
C
I
OR
OB
OP
REF
SCP
CTL
LIM
CC
CB
PG
O
VB
IN
T
B
S
CB terminal
VREF terminal
VB terminal
CTL1, CTL2 terminal
CTL terminal
PWRGOOD terminal
Duty
VREF terminal
VB terminal
(t
INE terminal
1 / f
Condition
5
OSC
Duty)
Min
100
5.5
1.0
0.1
30
100
700
0
0
0
0
30
1
1
Value
0.01
Typ
300
0.1
0.1
4.7
0.1
12
47
1
25
V
CC
MB3889
Max
V
100
700
500
130
V
1.0
1.0
18
23
15
10
10
0
0
1
1
REF
85
CC
1.8
Unit
kHz
mA
mA
mA
mA
k
k
V
V
V
V
V
V
F
F
F
F
F
C
7