MB3821 Datasheet, PDF (5/24 Pages) Fujitsu Component Limited. – 2-ch DC/DC Converter IC With Synchronous Rectifier

MB3821
s ABSOLUTE MAXIMUM RAGINGS
Parameter
Power supply voltage
Bias voltage
Output current
Output peak current
Power dissipation
Storage temperature
Symbol
Conditions
VCC
—
VB
—
Io
—
Io
Duty ≤ 5 %
PD
Ta ≤ +25°C
Tstg
—
Rating
Unit
Min.
Max.
—
32
V
—
17
V
—
50
mA
—
500
mA
—
740*
mW
−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
Conditions
Value
Unit
Min. Typ.
Max.
Power supply voltage
VCC
—
4.5
16
30
V
Bias voltage
VB
—
—
6
16
V
Reference voltage output current IOR
—
–1
—
0
mA
Input voltage
-IN pin
VIN
SEL, CTL pin
0
— VCC – 1.8 V
0
—
30
V
Output current
IO OUT pin
–30
—
30
mA
Output peak current
Io Duty ≤ 5 %
–300
—
300
mA
Timing capacitance
CT
—
150 500 15000 pF
Timing resistance
RT
—
6.8
10
12
kΩ
Oscillator frequency
SEL = 0 V (Normal mode)
10
200
fOSC
SEL = 5 V (Low power mode) 1
20
500 kHz
50
kHz
Soft-start capacitance
CS
—
—
0.1
1.0
µF
Short detection capacitance
CSCP
—
—
0.01
1.0
µF
Boot capacitance
CB
—
—
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.
5