3-terminal Dropper Type Regulator SI-3003S
Features
q
3-terminal IC regulator with 0.8A output current
q
Voltage accuracy of
±2%
q
Low Dropout voltage 0.5V at I
O
0.5A, 1V at I
O
0.8A
q
Built-in constant current type overcurrent, overvoltage and thermal protection circuits
q
TO-220 equivalent full-mold package
External Dimensions
(unit: mm)
4.2
±0.2
3.2
±0.2
10
±0.2
2.8
±0.2
16.9
±0.3
7.9
±0.2
4
±0.2
0.5
a
Absolute Maximum Ratings
Parameter
DC input voltage
Output current
Power Dissipation
P
D2
Junction temperature
Operating temperature
Storage temperature
Junction to case thermal resistance
Junction to ambient-air thermal
resistance
Tj
T
OP
Tstg
j
-c
j
-a
2 max
b
2.6
±0.15
(Ta =25ºC)
Ratings
35
2
0.8
*
Symbol
V
IN
I
O
P
D1
Unit
V
Conditions
0.94
±0.15
(13.5)
A
W
W
ºC
ºC
ºC
ºC/W
ºC/W
Stand-alone without heatsink
With infinite heatsink
Stand-alone without heatsink
0.85
–0.1
+0.2
22
1.8
–40 to +150
–40 to +100
–40 to +150
5.5
66.7
4•P1.7
±0.15
= 6.8
±0.15
(root dimensions)
0.45
–0.1
+0.2
1 2 3 4 5
Terminal connections
1. V
IN
a: Type No.
2. (NC)
b: Lot No.
3. GND
4. (NC)
5. V
O
(Forming No. 1115)
Electrical Characteristics
Parameter
Input voltage
Output voltage
Dropout voltage
Line regulation
Load regulation
Ripple rejection
Quiescent circuit current
Overcurrent protection starting
current
Symbol
V
IN
V
O
V
DIF
min
6
*
2
4.90
(Tj=25ºC, V
IN
=14V, I
O
=0.5A unless otherwise specified)
Ratings
typ
max
30
*
1
5.00
5.10
0.5
1.0
Unit
V
V
V
V
mV
mV
dB
10
mA
A
I
O
0.5A
I
O
0.8A
V
IN
=8 to 16V
I
O
=0 to 0.5A
f=100 to 120Hz
I
O
=0A
Conditions
Equivalent Circuit Diagram
V
IN
1
OCP
TSD
DRIVE
DET
ERR
REF
5
V
O
V
O LINE
V
O LOAD
R
REJ
Iq
I
S1
0.9
*
3
30
100
54
3
3
GND
Notes:
*1. Since P
D
(max)
= (V
IN
– V
O
) • I
O
=22 (W), V
IN
(max)
and I
O
(max)
may be limited depending on operating
conditions. Refer to the Ta —P
D
curve to compute the corresponding values.
*2. Refer to the dropout voltage.
*3. IS1 rating shall be the point at which the output voltage V
O
(V
IN
=14V, I
O
=0.5A) drops to –5%.
Standard Circuit Diagram
D
1
*
2
1
DC input
+
*
1
SI-3003S
3
5
4
N.C +
DC output
V
IN
C
1
C
2
N.C
2
C
O
V
O
Co :
Output capacitor (47 to 100µF, 50V)
*
1
C
1
,C
2
: Anti-oscillation capacitors (C
1
: approx. 47µF, C
2
: approx.
0.33µF). These are required for inductive input lines or
long wiring. Tantalum capacitors are recommended for
C
1
and Co, especially at low temperatures.
*
2
D
1
: Protection diode. Required as protection against reverse
biasing between input and output.
(Recommended diode: Sanken EU2Z.)
8
s
Io vs V
DIF
Characteristics
0.5
s
Line Regulation
5.1
s
Load Regulation
5.1
0.4
Dropout voltage V
DIF
(V)
Output voltage V
O
(V)
0.3
5.0
I
O
=0A
=0.2A
=0.5A
=0.8A
I
O
=0.5, 0.8A
=0.2A
=0A
Output voltage V
O
(V)
5.0
V
IN
=35V
=25V
=14V
=6V
0.2
4.9
4.9
0.1
0
0
0.2
0.4
0.6
0.8
Output current I
O
(A)
0
0
5
10
15
20
25
30
35
Input voltage V
IN
(V)
0
0
0.2
0.4
0.6
0.8
Output current I
O
(A)
s
Output Voltage Temperature Characteristics
5.1
s
Rise Characteristics
6
5
I
O
=0A
=0.5A
=0.8A
s
Circuit Current
250
200
Ground current lg (mA)
Output voltage V
O
(V)
Output voltage V
O
(V)
5.0
V
IN
/ I
O
:
30V / 0A
14V / 0.5A
6V / 0.8A
4
3
2
1
0
0
2
4
6
8
10
Input voltage V
IN
(V)
150
I
O
=0.8A
=0.5A
=0.2A
=0A
100
50
4.9
–50
0
50
100
150
0
0
5
10
15
20
25
30
35
Input voltage V
IN
(V)
Ambient temperature Ta (ºC)
s
Overcurrent Protection Characteristics
6
5
4
3
2
1
0
0
0.5
1.0
1.5
2.0
2.5
Output current I
O
(A)
s
Thermal Protection Characteristics
6
V
IN
=6V
I
O
=5mA
s
Ta —P
D
Characteristics
25
With infinite heatsink
With silicone grease
Heatsink: aluminum
5
4
3
2
1
0
120
Power Dissipation P
D
(W)
20
200 • 200 • 2mm
(2.3ºC/W)
15
100 • 100 • 2mm
(5.2ºC/W)
10
75 • 75 • 2mm
(7.6ºC/W)
5
Without heatsink
Output voltage V
O
(V)
V
IN
=6V
14V
35V
25V
Output voltage V
O
(V)
140
160
180
200
0
–40
0
40
80
100
Ambient temperature Ta (ºC)
Operating temperature Ta (ºC)
Note on Thermal Protection Characteristics:
The thermal protection circuit is intended for protection
against heat during instantaneous short-circuiting. Its
operation, including reliability, is not guaranteed for
short-circuiting over an extended period of time.
9
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