*1: "A" may be indicated to the right of the Sanken logo.
*2: V
IN(max)
and I
O(max)
are restricted by the relation P
D(max)
=(V
IN
-V
O
)•I
O
=18(W).
*3: Refer to the dropout voltage.(Refer to Setting DC Input Voltage on page 7.)
*4: I
S
1 is specified at –5(%) drop point of output voltage V
O
on the condition that V
IN
=V
O
+3V, I
O
=1A.
*5: A foldback type overcurrent protection circuit is built into the IC regulator. Therefore, avoid using it for the following applications as it may cause
starting errors:
(1) Constant current load (2) Plus/minus power (3) Series power (4) V
O
adjustment by raising ground voltage
sOutline
Drawing
φ
3.2
±0.2
7.9
±0.2
4
±0.2
0.5
(unit:mm)
10
±0.2
4.2
±0.2
2.8
±0.2
16.9
±0.3
a
2
max.
b
2.6
±0.15
a. Part Number
b. Lot Number
q
GND
w
V
O
e
V
IN
(13.5)
0.95
±0.15
0.85
+0.2
–0.1
P3.4
±0.1
×2=6.8
0.45
–0.1
+0.2
Plastic Mold Package Type
Flammability: UL94V-0
Weight: Approx. 2.3g
q
w
e
21
qSI-3001N
Series
sBlock
Diagram
3
T
r1
2
MIC
Reg.
Drive
Protection
Amp.
1
sStandard
External Circuit
C
0
D
1
V
REF
*
2
*1 C
1
C
2
2
3
DC Input
V
IN
+
*
1
C
1
C
2
SI-3001N
1
+
C
0
DC Output
V
O
: Output capacitor (47 to 100µF)
: Oscillation prevention capacitor (C
1
: Approx. 47µF,
C
2
: 0.33µF)
These capacitors are required if the input line is inductive
and in the case of long wiring. Tantalum capacitors are
recommended for C
1
and C
0
, particularly at low tempera-
tures.
: Protection diode
This diode is required for protection against reverse bias-
ing of the input and output. Sanken EU2Z is recommended.
*2 D
1
sT
a
-P
D
Characteristics
20
Infinite heatsink
Power Dissipation P
D
(W)
With Silicon Grease
Heatsink:Aluminum
15
200×200×2mm (2.3°C/W)
10 100×100×2mm (5.2°C/W)
75×75×2mm (7.6°C/W)
5
Without heatsink
0
–30
0
25
50
75
100
Ambient Temperature T
a
(°C)
P
D
=I
O
•[V
IN
(mean)–V
O
]
22
qSI-3001N
Series
sTypical
Characteristics
(T
a
=25°C)
I
O
vs. V
DIF
Characteristics
0.8
Temperature Coefficient of Output Voltage(SI-3051N)
5.08
V
IN
=8V
I
O
=0A
V
O
=5V
Circuit Current(SI-3051N)
50
V
O
=5V
5.06
Dropout Voltage V
DIF
(V)
0.6
5.04
Ground Current I
G
(mA)
40
Output Voltage V
O
(V)
30
0.4
5.02
20
I
O
=1.5A
10
1.0A
0.5A
0A
5.00
0.2
4.98
4.96
–40 –20
0
0
0.5
1.0
1.5
0
20
40
60
80
100 120 140
0
0
1
4
6
8
10
Output Current I
O
(A)
Ambient Temperature T
a
(°C)
Input Voltage V
IN
(V)
Rise Characteristics(SI-3051N)
7
6
Rise Characteristics(SI-3121N)
14
12
Rise Characteristics(SI-3241N)
30
25
Output Voltage V
O
(V)
Output Voltage V
O
(V)
5
4
3
0.5A
2
1
0
0
1A
A
=0
I
O
10
8
6
4
2
0
0
I
O
=0A
0.5A
1A
1.5A
Output Voltage V
O
(V)
20
1.
5A
15
I
O
=0A
0.5A
1A
1.5A
10
5
1
2
3
4
5
6
7
2
4
6
8
10
12
14
16
18
0
0
10
20
30
40
Input Voltage V
IN
(V)
Input Voltage V
IN
(V)
Input Voltage V
IN
(V)
Overcurrent Protection Characteristics(SI-3051N)
6
Overcurrent Protection Characteristics(SI-3121N)
14
12
Overcurrent Protection Characteristics(SI-3241N)
25
35V
25V
15V
5
V
IN
=30V
20
Output Voltage V
O
(V)
V
IN
=30V
V
IN
=40V
27V
30V
Output Voltage V
O
(V)
Output Voltage V
O
(V)
6V
8V
4
15
10
8
6
4
2
0
0
20
V
13V
15
3
10
2
1
5
0
0
1.0
2.0
3.0
4.0
1.0
2.0
3.0
4.0
0
0
1.0
2.0
25V
V
3.0
4.0
Output Current I
O
(A)
Output Current I
O
(A)
Output Current I
O
(A)
Thermal Protection Characteristics(SI-3051N)
6
5
Output Voltage V
O
(V)
V
IN
=8V
I
O
=10mA
4
3
2
Note on Thermal Protection:
The thermal protection circuit is intended for pro-
tection against heat during instantaneous short-
60
100
140
180
1
0
20
Case Temperature T
C
(°C)
circuiting. Its operation is not guaranteed for short-
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