Separate Excitation Step-down DC-DC Converter
1-1-3 DC/DC Converter ICs
SI-8000S Series Full-Mold, Separate Excitation Step-down Switching Mode
■Features
• Compact ...
Description
1-1-3 DC/DC Converter ICs
SI-8000S Series Full-Mold, Separate Excitation Step-down Switching Mode
■Features
Compact full-mold package (equivalent to TO220)
Output current: 3.0A High efficiency: 79 to 91% Requires only 4 discrete components
Internally-adjusted phase correction and output voltage
Built-in reference oscillator (60kHz) Built-in overcurrent and thermal protection
circuits Built-in soft start circuit (Output ON/OFF
available)
■Lineup
Part Number VO(V) IO(A)
SI-8033S 3.3
SI-8050S 5.0
SI-8090S 9.0 3.0
SI-8120S 12.0
■Absolute Maximum Ratings
Parameter DC Input Voltage
Power Dissipation
Junction Temperature Storage Temperature SW Terminal Applied Reverse Voltage Thermal Resistance(junction to case)
Symbol VIN PD1 PD2 Tj Tstg VSW θ j-c
*35V for SI-8033S
Ratings 43*
18(With infinite heatsink) 1.5(Without heatsink, stand-alone operation)
+125 –40 to +125
–1 5.5
■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
VIN IO Tjop
SI-8033S 5.5 to 28
SI-8050S 7 to 40
Ratings SI-8090S 12 to 40 0 to 3.0 –30 to +125
SI-8120S 15 to 40
SI-8150S 18 to 40
SI-8150S 15.0
Unit V W W °C °C V
°C/W
Unit V A °C
■Electrical Characteristics
Parameter
Output Voltage
SI-8000S*1 SI-8000SS
Efficiency
Oscillation Frequency
Line Regulation
Load Regulation Temperature Coefficient of Output...
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