1-1-3 DC/DC Converter ICs
SI-8000S Series Full-Mold, Separate Excitation Step-down Switching Mode
■Features
■Lineup
• Compact full-mold package (equivalent to
Part Number
SI-8033S
3.3
SI-8050S
5.0
SI-8090S
9.0
SI-8120S
12.0
SI-8150S
15.0
TO220)
VO(V)
IO(A)
3.0
• Output current: 3.0A
• High efficiency: 79 to 91%
• Requires only 4 discrete components
■Absolute Maximum Ratings
Parameter
Symbol
Ratings
43*
Unit
V
• Internally-adjusted phase correction and output
voltage
DC Input Voltage
VIN
PD1
PD2
Tj
18(With infinite heatsink)
W
Power Dissipation
• Built-in reference oscillator (60kHz)
1.5(Without heatsink, stand-alone operation)
W
Junction Temperature
+125
–40 to +125
–1
°C
°C
V
• Built-in overcurrent and thermal protection
circuits
Storage Temperature
Tstg
VSW
θj-c
SW Terminal Applied Reverse Voltage
Thermal Resistance(junction to case)
• Built-in soft start circuit (Output ON/OFF
available)
5.5
°C/W
*35V for SI-8033S
■Applications
• Power supplies for telecommunication equip-
ment
• Onboard local power supplies
■Recommended Operating Conditions
Ratings
Parameter
Symbol
Unit
SI-8033S
5.5 to 28
SI-8050S
7 to 40
SI-8090S
12 to 40
SI-8120S
15 to 40
SI-8150S
18 to 40
DC Input Voltage Range
VIN
IO
V
A
Output Current Range
0 to 3.0
Operating Junction Temperature Range
Tjop
–30 to +125
°C
■Electrical Characteristics
(Ta=25°C)
Ratings
Parameter
Symbol
SI-8033S
typ.
SI-8050S
SI-8090S
SI-8120S
SI-8150S
typ. max.
Unit
min.
3.17
max.
3.43
min.
4.80
4.90
typ.
5.00
5.00
max.
5.20
min.
typ.
9.00
max.
min.
11.50
typ.
max.
12.50
min.
SI-8000S*1
SI-8000SS
3.30
8.55
9.45
12.00
14.25
15.00
15.75
VO
Output Voltage
3.234
3.30
3.366
5.10
V
Conditions
η
V
IN=15V, I
O
O
O
=1.0A
V
IN=20V, I
O
=1.0A
V
IN=21V, I
O
=1.0A
=1.0A
=1.0A
V
IN=24V, I
90
O
O
O
=1.0A
V
IN=25V, I
91
O
O
O
=1.0A
79
84
88
Efficiency
%
Conditions
f
VIN=15V, I
60
=1.0A
=1.0A
VIN=20V, I
60
O
=1.0A
=1.0A
VIN=21V, I
60
O
O
V
V
IN=24V, I
60
=1.0A
=1.0A
V
V
IN=25V, I
60
=1.0A
=1.0A
Oscillation Frequency
Line Regulation
Load Regulation
kHZ
mV
Conditions
∆VOLINE
Conditions
∆VOLOAD
Conditions
VIN=15V, I
25
VIN=20V, I
40
O
VIN=21V, I
50
IN=24V, I
60
IN=25V, I
60
80
=1.0A
30
100
=1.0A
40
120
=1.0A
40
130
=1.0A
40
130
=1.0A
40
V
IN=8 to 28V, I
O
V
IN=10 to 30V, I
O
V
IN=15 to 30V, I
O
V
IN=18 to 30V, I
10
O
V
IN=21 to 30V, I
O
10
10
10
10
mV
V
IN=15V, I
O=0.5 to 1.5A
V
IN=20V, I
O=0.5 to 1.5A
V
IN=21V, I
O=0.5 to 1.5A
V
IN=24V, I
O=0.5 to 1.5A
VIN=25V, IO=0.5 to 1.5A
Temperature Coefficient of
Output Voltage
∆VO/∆Ta
±0.5
±0.5
±1.0
±1.0
±1.0
mV/°C
Overcurrent Protection
Starting Current
IS1
3.1
3.1
3.1
3.1
3.1
A
Conditions
V
IN=15V
VIN=20V
VIN=21V
V
IN=24V
V
IN=25V
*1: “S” may be printed to the right of the marking (except SI-8090S, SI-8120S, SI-8150S).
ICs
40
ETC [ ETC ]
