2001. 6. 28
1/5
SEMICONDUCTOR
TECHNICAL DATA
KIA278R25PI~KIA278R37PI
BIPOLAR LINEAR INTEGRATED CIRCUIT
Revision No : 3
4 TERMINAL 2A OUTPUT LOW DROP
VOLTAGE REGULATOR
The KIA278R
Series are Low Drop Voltage
Regulator suitable for various electronic equipments.
It provides constant voltage power source with TO-220
4 terminal lead full molded PKG.
The Regulator has multi function such as over current
protection, overheat protection and ON/OFF control.
FEATURES
2.0A Output Low Drop Voltage Regulator.
Built in ON/OFF Control Terminal.
Built in Over Current Protection, Over Heat
Protection Function.
LINE UP
A
F
J
L
D
M
1
2
3
4
1
2
3
4
DC INPUT (V )
DC OUTPUT (V )
GND
ON/OFF CONTROL
IN
O
DIM MILLIMETERS
TO-220IS-4
10.00 0.20
15.00 0.20
2.70 0.20
0.60 0.10
3.20 0.20
3.50 0.10
A
B
C
D
E
F
G
15.70 0.20
0.40 0.10
H
14.3+0.2/-0.1
1.45 0.10
1.00 0.10
2.54
4.50 0.20
7.5 0.1
1.50 0.10
J
K
L
M
N
O
P
S
R
8
5
B
C
E
G
H
L
V
V
U
T
K
N
O
R
S
P
+
_
+
_
+
_
1.30 0.1
3-1.00 0.1
1.30 0.1
T
U
V
+
_
+
_
+
_
+
_
+
_
+
_
+
_
+
_
+
_
+
_
+
_
+
_
+
_
MAXIMUM RATINGS (Ta=25 )
* Note) * : Under Development.
ITEM
OUTPUT VOLTAGE (Typ.)
UNIT
* KIA278R25PI
2.5
V
* KIA278R30PI
3.0
KIA278R33PI
3.3
* KIA278R35PI
3.5
* KIA278R37PI
3.7
CHARACTERISTIC
SYMBOL
RATING
UNIT
Remark
Input Voltage
V
IN
15
V
-
ON/OFF Control Voltage
V
C
15
V
-
Output Current
I
O
2
A
-
Power Dissipation 1
P
d1
1.5
W
No heatsink
Power Dissipation 2
P
d2
15
W
with heatsink
Junction Temperature
T
j
125
-
Operating Temperature
T
opr
-20 80
-
Storage Temperature
T
stg
-30 125
-
Soldering Temperature (10sec)
T
sol
260
-
2001. 6. 28
2/5
KIA278R25PI~KIA278R37PI
Revision No : 3
OVER HEAT
PROTECTION
CONTROL
OUTPUT ON/OFF
ASO
PROTECTION
BANDGAP
REFERENCE
-
+
1
4
2
3
V
o
V
IN
Control
GND
ELECTRICAL CHARACTERISTICS (Ta=25 )
(Unless otherwise specified, I
O
=1.0A, Ta=25 , Note1.)
BLOCK DIAGRAM
Note1) V
IN
of KIA278R25=4.2V Note2) V
IN
of KIA278R25=3.2 10V Note3) At V
IN
=0.95V
O
" KIA278R30=4.7V " KIA278R30=3.7 10V
" KIA278R33=5.0V " KIA278R33=4.0 10V
" KIA278R35=5.2V " KIA278R35=4.2 10V
" KIA278R37=5.4V " KIA278R37=4.4 10V
CHARACTERISTIC
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Output Voltage
KIA278R25
V
O
-
2.438
2.50
2.562
V
KIA278R30
-
2.925
3.00
3.075
KIA278R33
-
3.220
3.30
3.380
KIA278R35
-
3.413
3.50
3.587
KIA278R37
-
3.608
3.70
3.792
Load Regulation
Reg Load
I
O
=5mA 2A
-
0.1
2.0
%
Line Regulation
Reg Line
(Note 2)
-
0.5
2.5
%
Temperature Coefficient of Output Voltage
T
C
V
O
Tj=0 125
-
0.02
0.05
%/
Ripple Rejection
R R
-
45
55
-
dB
Drop Out Voltage
V
D
I
O
=2A
-
-
0.5
V
Output ON state for control Voltage
V
C(ON)
-
2.0
-
-
V
Output ON state for control Current
I
C(ON)
V
C
=2.7V
-
-
20
A
Output OFF state for control Voltage
V
C(OFF)
-
-
-
0.8
V
Output OFF state for control Current
I
C(OFF)
V
C
=0.4V
-
-
-0.4
mA
Quiescent Current
I
Q
I
O
=0
-
-
103
mA
2001. 6. 28
3/5
KIA278R25PI~KIA278R37PI
Revision No : 3
1
2
3
4
A
A
A
V
0.33
F
I
I
R
I
q
c
L
o
V
o
c
V
V
IN
47
F
Fig. 1 Standard Test Circuit
KIA278RXXPI
Specific IC
4
1
3
2
ON/OFF
signal
C
o
Load
V
o
High or Open:Output ON
Low
:Output OFF
CMOS or TTL
IN
V
Fig. 2 Application Circuit for Standard
1
2
3
V
0.33
F
R
L
e
o
V
IN
47
F
Fig. 1-2 Ripple Rejection Test Circuit
e
i
f=120Hz(sine wave)
ei=0.5Vrms
RR=20log(ei/eo)
KIA278RXXPI
4
2001. 6. 28
4/5
KIA278R25PI~KIA278R37PI
Revision No : 3
o
OUTPUT VOLTAGE DEVIATION V (mV)
-100
-25
JUNCTION TEMPERATURE T ( C)
j
j
o
Fig.5-1 T - V (KIA278R25)
0
25
50
75
100
125
-50
0
50
100
150
V =4.2V
I =0.5A
IN
O
j
JUNCTION TEMPERATURE T ( C)
Fig.5-3 T - V (KIA278R33)
OUTPUT VOLTAGE DEVIATION V (mV)
o
j
o
RELATIVE OUTPUT VOLTAGE (%)
0
0
OUTPUT CURRENT I (A)
O
Fig.4 I - V
1.0
2.0
3.0
4.0
20
40
60
80
100
O
O
OUTPUT VOLTAGE DEVIATION V (mV)
JUNCTION TEMPERATURE T ( C)
j
Fig.5-4 T - V (KIA278R35)
o
j
o
OUTPUT VOLTAGE DEVIATION V (mV)
25
JUNCTION TEMPERATURE T ( C)
-25
-100
-50
0
50
0
100
50
75
j
125
Fig.5-2 T - V (KIA278R30)
150
100
o
I =0.5A
V =4.7V
O
IN
-100
-25
0
25
50
75
100
125
-50
0
50
100
150
V =5.0V
I =0.5A
IN
O
25
-25
-100
-50
0
50
0
100
50
75
125
150
100
I =0.5A
V =5.2V
O
IN
j
o
D
POWER DISSIPATION P (W)
AMBIENT TEMPERATURE Ta ( C)
Fig.3 Ta - P
Note) Oblique line portion : Overheat
protection may operate in this
area.
D
0
-25
0
50
100
150
5
10
15
20
P 1:No heat sink
p 2:With infinite heat sink
D
D
P 1
P 2
D
D
2001. 6. 28
5/5
KIA278R25PI~KIA278R37PI
Revision No : 3
Fig.7 T - I
JUNCTION TEMPERATURE T ( C)
0
-25
QUIESCENT CURRENT I (mA)
q
j
q
j
0
25
50
75
100
125
2
4
6
8
10
V =35V
I =0
IN
O
Fig.8-1 f - RR
INPUT RIPPLE FREQUENCY f (kHz)
0.1
0
RIPPLE REJECTION RR (dB)
10
20
30
40
50
60
70
80
1
10
100
I =0.5A,ei=0.5V
V =4.2V(KIA278R25)
O
IN
rms
V =5.2V(KIA278R35)
IN
RIPPLE REJECTION RR (dB)
OUTPUT CURRENT I (A)
V =5.2V(KIA278R35)
V =4.2V(KIA278R25)
C =3.3
F
0.1
20
IN
IN
ref
rms
Fig.10-2 I - RR
O
O
f=120Hz,ei=0.5V
0.5
1.0
30
40
50
60
70
V =4.7V(KIA278R30)
IN
V =5.0V(KIA278R33)
IN
V =5.0V(KIA278R33)
IN
V =5.4V(KIA278R37)
IN
V =4.7V(KIA278R30)
IN
V =5.4V(KIA278R37)
IN
Fig.6 T - V
JUNCTION TEMPERATURE T ( C)
0
-25
DROPOUT VOLTAGE V (V)
D
j
I =2A
O
D
j
0
25
50
75
100
125
0.1
0.2
0.3
0.4
0.5
I =1.5A
O
I =1A
O
I =0.5A
O
Fig.5-1 T - V (KIA278R37)
JUNCTION TEMPERATURE T ( C)
OUTPUT VOLTAGE DEVIATION V (mV)
o
j
o
j
-100
-25
0
25
50
75
100
125
-50
0
50
100
150
V =5.4V
I =0.5A
IN
O
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