62
Parameter
Input Voltage
Output Voltage
Dropout Voltage
Line Regulation
Load Regulation
Temperature Coefficient of Output Voltage
Ripple Rejection
Overcurrent Protection
Starting Current
Unit
V
A
W
W
C
C
C
C/W
Symbol
V
IN
I
O
P
D1
P
D2
T
j
T
op
T
stg
R
th(j-c)
Parameter
DC Input Voltage
DC Output Current
Power Dissipation
Junction Temperature
Ambient Operating Temperature
Storage Temperature
Thermal Resistance (junction to case)
SI-3000V Series
3-Terminal, Low Dropout Voltage Dropper Type
s
Features
TO-3P package 3-terminal regulator
Output current: 2.0A
Low dropout voltage: V
DIF
1V (at I
O
=2.0A)
Built-in foldback overcurrent protection circuit
s
Applications
For stabilization of the secondary stage of switching power supplies
Electronic equipment
s
Absolute Maximum Ratings
(T
a
=25
C)
s
Electrical Characteristics
unit
V
V
V
mV
mV
mV/
C
dB
A
(T
a
=25
C)
Ratings
SI-3052V
SI-3122V/3152V
25
30
2.0
50(T
C
=25
C)
1.6(Without heatsink, stand-alone operation)
30 to +125
20 to +100
30 to +125
2.0
Symbol
V
IN
V
O
Conditions
V
DIF
Conditions
Conditions
V
OLINE
Conditions
V
OLOAD
Conditions
V
O
/
T
a
R
REJ
Conditions
I
S1
Conditions
Ratings
SI-3052V
SI-3122V
SI-3152V
min.
typ.
max.
min.
typ.
max.
min.
typ.
max.
6
15
13
25
16
25
4.9
5.0
5.1
11.8
12.0
12.2
14.8
15.0
15.2
V
IN
=8V, I
O
=1.0A
V
IN
=16V, I
O
=1.0A
V
IN
=20V, I
O
=1.0A
0.5
0.5
0.5
I
O
=1.0A
1.0
1.0
1.0
I
O
=2.0A
10
30
20
60
20
60
V
IN
=6 to 15V, I
O
=1.0A
V
IN
=13 to 25V, I
O
=1.0A
V
IN
=16 to 25V, I
O
=1.0A
40
100
80
200
80
200
V
IN
=8V, I
O
=0 to 2.0A
V
IN
=16V, I
O
=0 to 2.0A
V
IN
=20V, I
O
=0 to 2.0A
0.5
+1.5
1.5
54
54
54
f=100 to 120H
Z
2.4
2.4
2.4
V
IN
=8V
V
IN
=16V
V
IN
=20V
q
SI-3000V Series
The following are also available: SI-3522V(5.2V), SI-3062V(6V), SI-3082V(8V), SI-3922V(9.2V), SI-3102V(10V), SI-3132V(13.1V), SI-3182V(18V),
SI-3202V(20V).
63
s
Outline Drawing
s
Block Diagram
(unit:mm)
Plastic Mold Package Type (TO-3P)
Flammability: UL94V-0
Weight: Approx. 6g
Terminal Connections
q
Output
w
Input (backside of case)
e
Ground
3
2
1
Tr
1
R
1
R
2
R
3
R
5
R
4
M
1
Reg.
Protection
Drive
Amp.
V
REF
q
SI-3000V Series
15.6
0.3
4.8
max.
15.8
0.2
5.45
0.1
5.45
0.1
13.6
0.2
9.6
0.2
3.2
0.1
20.0
min.
2.0
4.0
3.5
14.9
0.3
19.9
0.3
1.05
3.0
0.65
1.7
2.0
2.0
max.
+0.2
0.1
+0.2
0.1
+0.2
0.3
+0.2
0.1
+0.2
0.1
q
w
e
Part Number
Lot Number
64
s
T
a
-P
D
Characteristics
s
Standard External Circuit
C
1
: Oscillation prevention capacitor (approx. 0.33
F)
Connection to terminal No.3 must be made as short as
possible.
C
2
: Output capacitor (47 to 100
F)
Connection to terminal No.2 must be made as short as
possible.
D
1
: Protection diode (RM1Z)
Required for protection against reverse biasing of input and
output.
Note 1: Prevention of oscillation at low temperatures
At low temperatures, oscillation may occur unless an
output capacitor with good tan
is used. Be sure to
connect a tantalum capacitor (approx. 10
F) in paral-
lel with output capacitor C
2
.
Note 2: An isolation type diode is provided from input to ground
and also from output to ground. These may be de-
stroyed if the device is reverse biased. In this case,
use a diode with low V
F
to protect them.
Note 3: The output voltage may not be adjusted by raising the
ground voltage (using a diode or resistor).
V
IN
V
O
D
1
C
2
C
1
3
2
1
SI-3000V
+
DC input
DC output
q
SI-3000V Series
24
20
16
12
8
4
0
20
0
25
50
75
100
200
200
2 (2.3
C/W)
100
100
2 (5.2
C/W)
75
75
2 (7.6
C/W)
Ambient Temperature T
a
(
C)
Power Dissipation P
D
(W)
Without heatsink
Without Mica
With Silicon Grease
Heatsink: Aluminum
Unit: mm
65
s
Typical Characteristics
I
O
vs. V
DIF
Characteristics
Temperature Coefficient of Output Voltage(SI-3052V)
Circuit Current(SI-3052V)
Rise Characteristics(SI-3052V)
Rise Characteristics(SI-3122V)
Rise Characteristics(SI-3152V)
Overcurrent Protection Characteristics(SI-3052V)
Overcurrent Protection Characteristics(SI-3122V)
Overcurrent Protection Characteristics(SI-3152V)
60 40 20
0
20
40
60
80 100 120 140
5.06
5.04
5.02
5.00
4.98
4.96
4.94
Ambient Temperature T
a
(
C)
Output Voltage V
O
(V)
V
IN
=8V
l
O
=1V
0
5
10
15
17.5
70
60
50
40
30
20
10
0
Input Voltage V
IN
(V)
Ground Current l
G
(mA)
V
O
=5V
lo=2.0A
1.5A
0A
0.5A
1.0A
0
1
2
3
4
5
7
6
6
5
4
3
2
1
0
Input Voltage V
IN
(V)
Output Voltage V
O
(V)
R
L
=2.5 to
0
2
4
6
8
10
16
12
14
16
14
12
10
8
6
4
2
0
Input Voltage V
IN
(V)
Output Voltage Vo (V)
R
L
=6 to
0
2
4
6
8
10
18
16
12
14
18
16
14
12
10
8
6
4
2
0
Input Voltage V
IN
(V)
Output Voltage V
O
(V)
R
L
=7.5 to
0
1
2
3
4
5
6
7
6
5
4
3
2
1
0
Output Current lo (A)
Output Voltage Vo (V)
10V
8V
V
IN
=6V
15V
0
1
2
3
4
5
6
7
16
14
12
10
8
6
4
2
0
Output Current lo (A)
Output Voltage Vo (V)
V
IN
=13V
16V
20V
0
1
2
3
4
5
6
7
18
16
14
12
10
8
6
4
2
0
Output Current l
O
(A)
Output Voltage V
O
(V)
V
IN
=16V
20V
(T
a
=25
C)
q
SI-3000V Series
0
0.5
1.0
1.5
2.0
0.8
0.6
0.4
0.2
0
Output Current l
O
(A)
Dropout Voltage V
DIF
(V)
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