Separate Excitation Step-down Switching Mode - ETC
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 Voltage
Symbol
VO
Conditions η
Conditions f
Conditions ∆VOLINE Conditions ∆VOLOAD Conditions
SI-8033S min.
typ.
max.
3.
17 3.
30 3.
43 3.
234 3.
30 3.
366
VIN=15V, IO=1.
0A 79
VIN=15V, IO=1.
0A 60
VIN=15V, IO=1.
0A 25 80
VIN=8 to 28V, IO=1.
0A 10 30
VIN=15V, IO=0.
5 to 1.
5A
∆VO/∆Ta
±0.
5
SI-8050S min.
typ.
max.
4.
80 5.
00 5.
20 4.
90 5.
00 5.
10
VIN=20V, IO=1.
0A 84
VIN=20V, IO=1.
0A 60
VIN=20V, IO=1.
0A 40 100
VIN=10 to 30V, IO=1.
0A 10 40
VIN=20V, IO=0.
5 to 1.
5A
±0.
5
Ratings SI-8090S min.
typ.
max.
8.
55 9.
0...
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