■Features
• Compact full-mold package (equivalent to TO220)
• Output current: 1.5 A
• High efficiency: 79 to 91%
• Requires only 4 external components
• Phase correction and output voltage adjustment performed internally
• Choke coil size can be reduced through the employment of high frequency
(125 kHz) design
• Built-in foldback overcurrent protection, thermal protection circuits
• Output ON/OFF capable (OFF state current consumption: 200
µ
A max.)
• Soft start possible via ON/OFF pin
■Applications
• Power supplies for telecommunication equipment
• Onboard local power supplies
■Lineup
Full-Mold, Separate Excitation Switching Type
SI-8000JF Series
■Recommended Operating Conditions
■Absolute Maximum Ratings
Parameter
DC Input Voltage
Power Dissipation
Junction Temperature
Storage Temperature
Thermal Resistance (Junction to Case)
Ratings
43
16.6 (with infinite heatsink)
1.5 (without heatsink, standalone operation)
+125
–40 to +125
6.0
Part Number SI-8015JF SI-8025JF SI-8033JF SI-8050JF SI-8090JF SI-8120JF
VO (V) 1.59 2.5 3.3 5.0 9.0 12.0
IO (A) 1.5
Symbol
VIN
PD1
PD2
Tj
Tstg
Rth (j-c)
Unit
V
W
W
°C
°C
°C/W
Symbol
VIN1
VIN2
IO
Tjop
Parameter
DC Input Voltage Range
Output Current Range
Operating Junction Temperature Range
Ratings
SI-8015JF* SI-8025JF SI-8033JF SI-8050JF SI-8090JF SI-8120JF
VO+2 to VO+3
4.5 to 5.5 5.3 to 6.3 7 to 8 11 to 12 14 to 15
VO+3 to 40
5.5 to 40 6.3 to 40 8 to 40 12 to 40 15 to 40
0 to 1.5
–30 to +125
Conditions
IO=0 to 1A
IO=0 to 1.5A
VIN≥VO+3V
Unit
V
V
A
°C
*SI-8015JF is a variable output voltage type. The variable output voltage range is from 2.5 V to 24 V.
●SI-8000JF Series
Parameter
Output Voltage
*1
Efficiency
Switching Frequency
Line Regulation
Load Regulation
Overcurrent Protection
Starting Current
ON/OFF
*5
Low Level Voltage
Terminal
Leak Current at
Low V oltage
Quiescent Circuit
Current
■Electrical Characteristics (Ta=25°C)
Unit
V
%
kH
Z
mV
mV
mV/°C
A
V
µ
A
mA
µ
A
Symbol
V
O*2
Conditions
η
Conditions
f
Conditions
∆V
OLINE
Conditions
∆V
OLOAD
Conditions
∆V
O
/∆T
a*4
I
S1
Conditions
V
SSL
I
SSL
Conditions
I
q
Conditions
I
q(off)
Conditions
■External Dimensions
Forming No.1101
10.0
±0.2
4.2
±0.2
0.95
±0.15
8.2
±0.7
2.6
±0.1
3.9
±0.7
(4.3)
(4.6)
(8.0) (17.9)
(2.0)
0.85
+0.2
–0.1
0.45
+0.2
–0.1
3.2
±0.2
4.0
±0.2
7.9
±0.2
5.0
±0.6
16.9
±0.3
0.5
a
c
12345
b
P1.7
±0.7
×4=6.8
±0.7
2.8
±0.2
φ
(Unit : mm)
a. Part Number
b. Lot Number
c. Logo Mark
Pin Arrangement
qVIN
wSWOUT
eGND
rVOS
tON/OFF
Plastic Mold Package Type
Flammability: UL94V-0
Weight: Approx. 2.3g
*5: Pin 5 is the ON/OFF pin. Connecting a capacitor to this pin enables the
soft star t function. By using this pin, the output can also be tur ned on or
off.
To stop output, set the ON/OFF pin voltage to VSSL or less. To switch the
potential of the ON/OFF pin, drive the open collector of the tr ainsistor , etc.
When SI-8000JF is started using the ON/OFF pin, take appropriate action
such as limiting the current for a large-capacity C3 because a discharge
current flows to the ON/OFF control transmistor from C3. The ON/OFF pin
is pulled up to the power supply in the IC, so no external voltage can be
applied. If this pin is not used, leave it open.
SI-8000JF SI-8000JF
ON/OFF5 ON/OFF5 ON/OFF
C3C3
5
VOUT. ON/OFF Soft start Soft start
+VOUT. ON/OFF
SI-8000JF
*1: Reference voltage for SI-8015JF *3: Reference voltage temperature coefficient for SI-8015JF
*2: VREF for SI-8015JF *4: ∆VREF/∆Ta f or SI-8015JF
●SI-8000JF Series
Rating
SI-8015JF SI-8025JF SI-8033JF SI-8050JF SI-8090JF SI-8120JF
min. typ. max. min. typ. max. min. typ. max. min. typ. max. min. typ. max. min. typ. max.
1.558 1.59 1.622 2.45 2.50 2.55 3.234 3.30 3.366 4.90 5.00 5.10 8.82 9.00 9.18 11.76 12.00 12.24
V
IN
=12V, I
O
=0.5A V
IN
=12V, I
O
=0.5A V
IN
=15V, I
O
=0.5A V
IN
=20V, I
O
=0.5A V
IN
=21V, I
O
=0.5A V
IN
=24V, I
O
=0.5A
67 74 77 82 86 88
V
IN
=12V, I
O
=0.5A V
IN
=12V, I
O
=0.5A V
IN
=15V, I
O
=0.5A V
IN
=20V, I
O
=0.5A V
IN
=21V, I
O
=0.5A V
IN
=24V, I
O
=0.5A
125 125 125 125 125 125
V
IN
=12V, I
O
=0.5A V
IN
=12V, I
O
=0.5A V
IN
=15V, I
O
=0.5A V
IN
=20V, I
O
=0.5A V
IN
=21V, I
O
=0.5A V
IN
=24V, I
O
=0.5A
25 80 25 80 25 80 40 100 50 120 60 130
V
IN
=8 to 30V, I
O
=0.5A V
IN
=7 to 30V, I
O
=0.5A V
IN
=8 to 30V, I
O
=1.0A V
IN
=10 to 30V, I
O
=1.0A V
IN
=15 to 30V, I
O
=1.0A V
IN
=18 to 30V, I
O
=1.0A
10 30 10 30 10 30 10 40 10 40 10 40
V
IN
=12V, I
O
=0.2 to 0.8A V
IN
=12V, I
O
=0.2 to 0.8A 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
±0.5 ±0.5 ±1.0 ±1.0
1.6 1.6 1.6 1.6 1.6 1.6
V
IN
=12V V
IN
=12V V
IN
=15V V
IN
=20V V
IN
=21V V
IN
=24V
0.5 0.5 0.5 0.5 0.5 0.5
100 100 100 100 100 100
V
SSL
=0V V
SSL
=0V V
SSL
=0V V
SSL
=0V V
SSL
=0V V
SSL
=0V
777777
V
IN
=12V, I
O
=0A V
IN
=12V, I
O
=0A V
IN
=15V, I
O
=0A V
IN
=20V, I
O
=0A V
IN
=21V, I
O
=0A V
IN
=24V, I
O
=0A
200 200 200 200 200 200
V
IN
=12V, V
ON/OFF
=0.3V V
IN
=12V, V
ON/OFF
=0.3V V
IN
=15V, V
ON/OFF
=0.3V V
IN
=20V, V
ON/OFF
=0.3V V
IN
=21V, V
ON/OFF
=0.3V V
IN
=24V, V
ON/OFF
=0.3V
Temperature Coefficient of
Output V oltage
*3
■Example of Pattern on PC Board
■Block Diagram
■Standard External Circuit
4
3
GND
2
V
IN
ON/OFF
SW OUT
1
5PReg. OCP
SI-8025JF, 8033JF, 8050JF, 8090JF, 8120JF
Reset
OSC
+
–
Comp.
Error Amp.
Latch&
Drive
TSD
ON/OFF
Soft
Start
V
REF
+
–
C1: 50V/220
µ
F
C2: 25V/470
µ
F
C3: 10V/0.47
µ
F (when using soft-start function)
L1: 100
µ
H
Di : RK16 (Sanken)
C3
C1
C2
+
+
15
VOUT
VIN GND
Di
SI-8000JF
Recommended Pattern
SI-8025JF, 8033JF, 8050JF, 8090JF, 8120JF
4
3
GND
2
V
IN
V
REF
ON/OFF
SW OUT
1
5PReg. OCP
Reset
OSC
+
–
Comp.
Error Amp.
Latch&
Drive
TSD
ON/OFF
Soft
Start
V
REF
+
–
SI-8015JF
C1: 50V/220
µ
F
C2: 25V/470
µ
F
C3: 10V/0.47
µ
F (when using soft-start function)
C4: 6800pF
L1: 100
µ
H
Di : RK16 (Sanken)
V
IN
220µFDi REF
L1
470µF
V
IN
GNDON/OFF
GND
SI-8015JF
SW
V
REF
I
REF
R
1
R
2
C
4
12
4
35
+ +
V
O
GND
SI-8015JF
V
IN
C
1
C
3
Di
L1
C
2
V
IN
GNDON/OFF
GND
SI-8000JF
SW
V
S
12
4
35
+ +
V
OUT
GND
SI-8025JF, 8033JF, 8050JF, 8090JF, 8120JF
C3
C1
R1
C2
+
+
15
VOUT
VIN GND
Di
SI-8015JF
R2
Recommended Pattern
SI-8015JF
* For the optimum operating conditions, use one-point GND wiring centering on pin 3, and place each component as closely as possible.
●SI-8000JF Series
■Typical characteristics (SI-8015JF) (VO=5V)
Efficiency Characteristics Output Voltage Load Regulation
Overcurrent Protection Characteristics Thermal Protection Characteristics Temperature Characteristics
■Typical characteristics (SI-8025JF)
90
80
70
60
50
40
30
20
Efficiency η
(%)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Current I
O
(A)
V
IN
=4.5V
40V
20V
12V
3
2.5
2
1.5
1
0.5
002 6 10 144812
Intput Voltage VIN (V)
16
*Load=C.C
I
O
=0A
1.5A
0.5A
Output Voltage VO (V)
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
2.45
Output Voltage VO (V)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Current IO (A)
4.5V
12V
20V
VIN=40V
Output Voltage V
O
(V)
3
2.5
2
1.5
1
0.5
0012
Output Current I
O
(A)
3456
V
IN
=7V, 12V, 20V, 40V
50 75 100 125 150 175 200
3
2.5
2
1.5
1
0.5
0
Ambient Temperature Ta (°C)
Output Voltage VO (V)
V
IN
=12V, I
O
=0A
TSD OFF TSD ON
150
140
130
120
110
100
90
80
70
60
Efficiency η (%) Frequency (kHz)
Output Voltage VO (V)
–40 –20 0 20 40 60 80 100 120 140
Ambient Temperature Ta (°C)
Freq
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
VO
VIN=12V, IO=0.5A
η
Efficiency Characteristics Output Voltage Load Regulation
Overcurrent Protection Characteristics Thermal Protection Characteristics Temperature Characteristics
6
5
4
3
2
1
002 6 10 14 184812
Input Voltage V
IN
(V)
0A
Output Voltage V
O
(V)
16 20
1.5A
0.5A
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
8V
Output Voltage VO (V)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Current IO (A)
VIN=40V
30V
20V
Output Voltage V
O
(V)
6
5
4
3
2
1
00 0.5 1.0
Output Current I
O
(A)
1.5 2.0 2.5 3.0
V
IN
=10V
20V
30V
40V
50 75 100 125 150 175 200
10
8
6
4
2
0
Ambient Temperature T
a
(°C)
Output Voltage V
O
(V)
TSD OFF TSD ON
V
IN
=20V, I
O
=0A
V
IN
=20V, I
O
=0.5A
150
140
130
120
110
100
90
80
70
60
Efficiency η
(%) Frequency (kHz)
Output Voltage V
O
(V)
–40 –20 0 20 40 60 80 100 120 140
Ambient Temperature T
a
(°C)
Freq
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
V
O
η
90
80
70
60
50
40
30
20
Efficiency η
(%)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Current IO (A)
(Ta=25°C)
40V
30V
20V
VIN
8V
●SI-8000JF Series
■Typical characteristics (SI-8033JF)
Efficiency Characteristics Output Voltage Load Regulation
Overcurrent Protection Characteristics Thermal Protection Characteristics Temperature Characteristics
■Typical characteristics (SI-8050JF)
Efficiency Characteristics Output Voltage Load Regulation
Overcurrent Protection Characteristics Thermal Protection Characteristics Temperature Characteristics
90
80
70
60
50
40
30
20
Efficiency η (%)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Current IO (A)
(Ta=25°C)
VIN =6.3V
15V
30V
40V
5
4
3
2
1
002 6 10 14 184812
Input Voltage VIN (V)
Output Voltage VO (V)
16 20
(Load=C.R T
a
=25°C)
1.5A
I
O
=0A
0.5A
3.40
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
15V
30V
6.3V
Output Voltage VO (V)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Current IO (A)
(T
a
=25°C)
V
IN
=40V
OutputVoltage V
O
(V)
5
4
3
2
1
00 0.5 1.0
OutputCurrent I
O
(A)
1.5 2.0 2.5 3.0
(Ta=25°C)
VIN=8V
15V
30V
40V
50 75 100 125 150 175 200
5
4
3
2
1
0
Ambient Temperature Ta (°C)
Output Voltage VO (V)
VIN=15V, IO=0A
TSD OFF TSD ON
150
140
130
120
110
100
90
80
70
60
Efficiency η
(%) Frequency (kHz)
Output Voltage V
O
(V)
–40 –20 0 20 40 60 80 100 120 140
Ambient Temperature Ta (°C)
Freq
3.38
3.36
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
η
V
O
V
IN
=15V, I
O
=0.5A
Output Voltage V
O
(V)
6
5
4
3
2
1
00 0.5 1.0
Output Current I
O
(A)
1.5 2.0 2.5 3.0
(Ta=25°C)
VIN=10V
20V
30V
40V
50 75 100 125 150 175 200
10
8
6
4
2
0
Ambient Temperature T
a
(°C)
Output Voltage V
O
(V)
V
IN
=20V, I
O
=0A
TSD OFF TSD ON
150
140
130
120
110
100
90
80
70
60
Efficiency η
(%) Frequency (kHz)
Output Voltage V
O
(V)
–40 –20 0 20 40 60 80 100 120 140
Ambient Temperature T
a
(°C)
Freq
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
VO
VIN=20V, IO=0.5A
η
90
80
70
60
50
40
30
Efficiency η
(%)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Current I
O
(A)
(T
a
=25°C)
V
IN
=8V
20V
40V
30V
6
5
4
3
2
1
002 6 10 14 184812
Input Voltage V
IN
(V)
0.5A
Output Voltage V
O
(V)
16 20
(Load=C.R T
a
=25°C)
I
O
=0A
1.5A
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
20V
8V
Output Voltage VO (V)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Current IO (A)
(T
a
=25°C)
V
IN
=40V 30V
●SI-8000JF Series
■Typical characteristics (SI-8090JF)
Efficiency Characteristics Output Voltage Load Regulation
Overcurrent Protection Characteristics Thermal Protection Characteristics Temperature Characteristics
Output Voltage VO (V)
12
10
8
6
4
2
00 0.5 1.0
Output Current IO (A)
1.5 2.0 2.5 3.0
(T
a
=25°C)
V
IN
=40V
30V
21V
14V
50 75 100 125 150 175 200
10
8
6
4
2
0
Ambient Temperature T
a
(°C)
Output Voltage V
O
(V)
V
IN
=21V, I
O
=0A
TSD OFF TSD ON
150
140
130
120
110
100
90
80
70
60
Efficiency η
(%) Frequency (kHz)
Output Voltage V
O
(V)
–40 –20 0 20 40 60 80 100 120 140
Ambient Temperature Ta (°C)
Freq
9.10
9.08
9.06
9.04
9.02
9.00
8.98
8.96
8.94
8.92
VO
VIN=21V, IO=0.5A
η
100
90
80
70
60
50
40
Efficiency η (%)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Current IO (A)
(T
a
=25°C)
V
IN
=12V
40V
21V30V
12
10
8
6
4
2
002 6 10 14 184812
Input Voltage V
IN
(V)
Output Voltage V
O
(V)
16 20
(T
a
=25°C)
1.5A
I
O
=0A
0.5A
9.20
9.15
9.10
9.05
9.00
8.95
8.90
8.85
8.80
21V
12V
Output Voltage VO (V)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Current IO (A)
(T
a
=25°C)
V
IN
=40V 30V
●SI-8000JF Series