1-1-2 Switching Mode Regulator ICs
SI-8000E Series
sFeatures
• Compact full-mold package (equivalent to
TO220)
• High efficiency: 80 to 88%
• Requires only 4 discrete components
Full-Mold, Separate Excitation Step-down Switching Mode Regulator ICs
sLineup
Part Number
V
O
(V)
I
O
(A)
SI-8050E
5.0
0.6
SI-8120E
12.0
• Internally-adjusted phase correction and output
voltage
• Built-in reference oscillator (60kHz)
• Built-in overcurrent and thermal protection
circuits
sAbsolute
Maximum Ratings
Parameter
DC Input Voltage
Power Dissipation
Junction Temperature
Storage Temperature
Thermal Resistance(junction to case)
Thermal Resistance(junction to ambient air)
Symbol
V
IN
P
D1
P
D2
T
j
T
stg
Ratings
43
14(With infinite heatsink)
1.5(Without heatsink, stand-alone operation)
+125
–40 to +125
7.0
66.7
Unit
V
W
W
°C
°C
°C/W
°C/W
sApplications
• Power supplies for telecommunication
equipment
• Onboard local power supplies
θ
j-c
θ
j-a
sRecommended
Operating Conditions
Ratings
Parameter
DC Input Voltage Range
Output Current Range
Operating Junction Temperature Range
Operating Temperature Range
Symbol
V
IN
I
O
T
jop
T
op
SI-8050E
7 to 40
0 to 0.6
–30 to +125
–30 to +125
SI-8120E
14 to 40
Unit
V
A
°C
°C
sElectrical
Characteristics
Ratings
Parameter
Symbol
V
O
Output Voltage
Efficiency
Oscillation Frequency
Line Regulation
Load Regulation
Temperature Coefficient of Output Voltage
Overcurrent Protection Starting
Current
Conditions
min.
4.80
SI-8050E
typ.
5.00
V
IN
=20V, I
O
=0.3A
80
V
IN
=20V, I
O
=0.3A
60
V
IN
=20V, I
O
=0.3A
80
V
IN
=10 to 30V, I
O
=0.3A
30
V
IN
=20V, I
O
=0.1 to 0.4A
±0.5
0.61
V
IN
=10V
0.61
V
IN
=17V
40
100
max.
5.20
min.
11.52
SI-8120E
typ.
12.00
V
IN
=24V, I
O
=0.3A
88
V
IN
=24V, I
O
=0.3A
60
V
IN
=24V, I
O
=0.3A
100
V
IN
=17 to 30V, I
O
=0.3A
70
V
IN
=24V, I
O
=0.1 to 0.4A
±1.5
95
130
max.
12.48
(T
a
=25°C)
Unit
V
%
kH
Z
mV
mV
mV/°C
A
η
Conditions
f
Conditions
∆V
OLINE
Conditions
∆V
OLOAD
Conditions
∆V
O
/∆T
a
I
S1
Conditions
60
ICs
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