1-1-2 Switching Mode Regulator ICs
SI-8000S Series
Full-Mold, Separate Excitation Step-down Switching Mode Regulator ICs
sFeatures
• 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)
sLineup
Part Number
V
O
(V)
I
O
(A)
SI-8033S
3.3
SI-8050S
5.0
SI-8090S
9.0
3.0
SI-8120S
12.0
SI-8150S
15.0
sAbsolute
Maximum Ratings
Parameter
DC Input Voltage
Power Dissipation
Junction Temperature
Storage Temperature
SW Terminal Applied Reverse Voltage
Thermal Resistance(junction to case)
Symbol
V
IN
P
D1
P
D2
T
j
T
stg
V
SW
Ratings
43
*
18(With infinite heatsink)
1.5(Without heatsink, stand-alone operation)
+125
–40 to +125
–1
5.5
Unit
V
W
W
°C
°C
V
°C/W
θ
j-c
*35V for SI-8033S
sApplications
• Power supplies for telecommunication
equipment
• Onboard local power supplies
sRecommended
Operating Conditions
Ratings
Parameter
DC Input Voltage Range
Output Current Range
Operating Junction Temperature Range
Symbol
V
IN
I
O
T
jop
SI-8033S
5.5 to 28
SI-8050S
7 to 40
SI-8090S
12 to 40
0 to 3.0
–30 to +125
SI-8120S
15 to 40
SI-8150S
18 to 40
Unit
V
A
°C
sElectrical
Characteristics
Ratings
Parameter
SI-8000S*
1
Output Voltage
SI-8000SS
V
O
Conditions
Efficiency
Oscillation Frequency
Line Regulation
Load Regulation
Temperature Coefficient of
Output Voltage
Overcurrent Protection
Starting Current
Symbol
min.
3.17
3.234
SI-8033S
typ.
3.30
3.30
79
V
IN
=15V, I
O
=1.0A
60
V
IN
=15V, I
O
=1.0A
25
10
80
30
V
IN
=8 to 28V, I
O
=1.0A
V
IN
=15V, I
O
=0.5 to 1.5A
±0.5
3.1
V
IN
=15V
3.1
V
IN
=20V
max.
3.43
3.366
min.
4.80
4.90
SI-8050S
typ.
5.00
5.00
84
V
IN
=20V, I
O
=1.0A
60
V
IN
=20V, I
O
=1.0A
40
10
100
40
V
IN
=10 to 30V, I
O
=1.0A
V
IN
=20V, I
O
=0.5 to 1.5A
±0.5
3.1
V
IN
=21V
max.
5.20
5.10
V
IN
=21V, I
O
=1.0A
88
V
IN
=21V, I
O
=1.0A
60
V
IN
=21V, I
O
=1.0A
50
10
120
40
V
IN
=15 to 30V, I
O
=1.0A
V
IN
=21V, I
O
=0.5 to 1.5A
±1.0
3.1
V
IN
=24V
V
IN
=24V, I
O
=1.0A
90
V
IN
=24V, I
O
=1.0A
60
V
IN
=24V, I
O
=1.0A
60
10
130
40
V
IN
=18 to 30V, I
O
=1.0A
V
IN
=24V, I
O
=0.5 to 1.5A
±1.0
3.1
V
IN
=25V
V
IN
=25V, I
O
=1.0A
91
V
IN
=25V, I
O
=1.0A
60
V
IN
=25V, I
O
=1.0A
60
10
130
V
IN
=21 to 30V, I
O
=1.0A
40
V
IN
=25V, I
O
=0.5 to 1.5A
±1.0
min.
8.55
SI-8090S
typ.
9.00
max.
9.45
min.
11.50
SI-8120S
typ.
12.00
max.
12.50
min.
14.25
SI-8150S
typ.
15.00
max.
15.75
(T
a
=25°C)
Unit
V
V
IN
=15V, I
O
=1.0A
V
IN
=20V, I
O
=1.0A
η
Conditions
f
Conditions
∆V
OLINE
Conditions
∆V
OLOAD
Conditions
∆V
O
/∆T
a
I
S1
Conditions
%
kH
Z
mV
mV
mV/°C
A
*1: “S” may be printed to the right of the marking (except SI-8090S, SI-8120S, SI-8150S).
68
ICs
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