Separate Excitation Step-down Switching Mode
Description
1-1-3 DC/DC Converter ICs
SI-8000JF Series Full-Mold, Separate Excitation Step-down Switching Mode
■Features
• Compact full-mold package (equivalent to TO220)
• Output current: 1.
5A • High efficiency: 67 to 88% • Requires only 4 discrete components • Internally-adjusted phase correction and
output voltage • Capable of downsize a choke-coil due to IC's
high switching frequency (125kHz).
(Compared with conventional Sanken devices) • Built-in foldback-overcurrent and thermal protection circuits • Output ON/OFF available (circuit current at output OFF: 200µA max.
) • Soft start available by ON/OFF pin
■Lineup
Part Number VO (V)* IO (A)
* VREF(V) for SI-8015JF
SI-8015JF 1.
59
■Absolute Maximum Ratings
Parameter DC Input Voltage
Power Dissipation
Junction Temperature Storage Temperature Thermal Resistance (Junction to Case)
Symbol VIN PD1 PD2 Tj Tstg θj-c
SI-8033JF 3.
3
1.
5
SI-8050JF 5.
0
Ratings 43
16.
6 (with infinite heatsink) 1.
5 (without heatsink, standalone operation)
+125 –40 to +125
6.
0
SI-8120JF 12.
0
Unit V W W °C °C
°C/W
■Applications
• Power supplies for telecommunication equipment • Onboard local power supplies
■Recommended Operating Conditions
Parameter
DC Input Voltage Range Output Current Range Operating Junction Temperature Range
Symbol
VIN1 VIN2
IO Tjop
SI-8015JF* VO+2 to 40 VO+3 to 40
Ratings
SI-8033JF
SI-8050JF
5.
3 to 40
7 to 40
6.
3 to 40
8 to 40
0 to 1.
5
–30 to +125
SI-8120JF 14 to 40 15 to 40
Unit
V V A °C
Conditions
IO=0 to 1A IO=0 to 1.
5A VIN≥VO+3V
* SI-8015JF is a variable output voltage type.
The variable output voltage range is from 2.
5 V to 24 V.
■Electrical Characteristics
Parameter
Output Voltage*1
Efficiency
Oscillation Frequency
Line Regulation
Load Regulation Temperature Coefficient of Output Voltage*3 Overcurrent Protection Starting Current
Low Level Voltage ON/OFF*5
Outflow Current Terminal
at Low Voltage
Quiescent Circuit Current
Symbol
VO*2 Conditions
η Conditions
f Conditions ∆VOLINE Conditions ∆VOLOAD Condi...
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