1-1-2 Switching Mode Regulator ICs
SI-8000W Series
■Features
• Surface-mount package (SOP8)
• Output current: 0.6A
• High efficiency: 75 to 80%
• Requires only 4 discrete components
Surface-Mount, Separate Excitation Step-down Switching Mode Regulator ICs
■Absolute
Maximum Ratings
Parameter
DC Input Voltage
Power Dissipation
Junction Temperature
Storage Temperature
Thermal Resistance (Junction to 7-Pin Lead)
Thermal Resistance (Junction to Ambient Air)
*1
Symbol
V
IN
P
D
T
j
T
stg
Ratings
35
1
–30 to +125
–40 to +125
22
100
Unit
V
W
°C
°C
°C/W
°C/W
• Internally-adjusted phase correction and
output voltage adjustment performed internally
• Built-in reference oscillator (60kHz)
• Built-in overcurrent and thermal protection
circuits
θ
j-L
θ
j-a
*1: Glass-epoxy board of 40
×
40mm (copper laminate area 4.3%)
■Applications
• Power supplies for telecommunication equipment
• Onboard local power supplies
■Recommended
Operating Conditions
Ratings
Parameter
DC Input Voltage Range
Output Current Range
Operating Junction Temperature Range
Symbol
V
IN
I
O
T
jop
SI-8033W
5.3 to 28
0 to 0.6
–30 to +125
SI-8050W
7 to 33
Unit
V
A
°C
■Electrical
Characteristics
Ratings
Parameter
Symbol
min.
Output Voltage
Efficiency
Oscillation Frequency
Line Regulation
Load Regulation
Temperature Coefficient of Output Voltage
Ripple Rejection
Overcurrent Protection Starting
Current
V
O
Conditions
3.17
SI-8033W
typ.
3.30
V
IN
=15V, I
O
=0.3A
75
V
IN
=15V, I
O
=0.3A
60
V
IN
=15V, I
O
=0.3A
60
V
IN
=8 to 28V, I
O
=0.3A
20
V
IN
=15V, I
O
=0.1 to 0.4A
±0.5
45
f=100 to 120H
Z
0.61
V
IN
=15V
0.61
V
IN
=20V
30
80
max.
3.43
min.
4.80
SI-8050W
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
45
f=100 to 120H
Z
40
100
max.
5.20
(T
a
=25°C)
Unit
V
%
kH
Z
mV
mV
mV/
°C
dB
A
η
Conditions
f
Conditions
∆V
OLINE
Conditions
∆V
OLOAD
Conditions
∆V
O
/∆T
a
R
REJ
Conditions
I
S1
Conditions
44
ICs
SANKEN [ SANKEN ELECTRIC ]
