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SEMICONDUCTOR
TECHNICAL DATA
2A ADJUSTABLE LOW DROP VOLTAGE REGULATOR The KIA278R00PI is a 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.
A
KIA278R00PI
BIPOLAR LINEAR INTEGRATED CIRCUIT
C
O E
L
V
V T
S L K H
R
FEATURES
Adjustable Output Voltage (Range : 1.5~30V) 1.0A Output Low Drop Voltage Regulator. Built in Over Current Protection, Over Heat Protection Function.
J
U
D
M
N
DIM MILLIMETERS _ A 10.00 + 0.20 _ B 15.00 + 0.20 _ C 2.70 + 0.20 _ D 0.60 + 0.10 _ 3.20 + 0.20 E _ F 3.50 + 0.10 _ G 15.70 + 0.20 _ H 0.40 + 0.10 14.3+0.2/-0.1 J _ 1.45+ 0.10 K _ 1.00 + 0.10 L 2.54 M _ N 4.50 + 0.20 _ O 7.5 + 0.1 _ P 1.50 + 0.10 R 5 S 8 _ T 1.30 + 0.1 _ U 3-1.00 + 0.1 _ V 1.30 + 0.1 1 2 3 4 DC INPUT (V IN ) DC OUTPUT (VO ) GND ADJUSTABLE TERMINAL (VADJ )
B
P 1 2 3 4
MAXIMUM RATINGS (Ta=25
CHARACTERISTIC Input Voltage Output Current Power Dissipation 1 Power Dissipation 2 Junction Temperature Operating Temperature Storage Temperature Soldering Temperature (10sec)
)
SYMBOL VIN IOUT PD1 PD2 Tj Topr Tstg Tsol RATING 35 2 1.5 15 125 -20 80 -30 125 260 UNIT V A W W Remark No heatsink with heatsink -
2004. 3. 9
Revision No : 0
G
F
TO-220IS-4
1/5
KIA278R00PI
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, VIN=15V, VO=10V, IO=1A, R1=470
CHARACTERISTIC Input Voltage Output Voltage Load Regulation Line Regulation Ripple Rejection Reference Voltage Temperature cofficient of reference Voltage DropOut Voltage Quiescent Current SYMBOL VIN VO Reg Load Reg Line R R R2=76
(Note1 : VIN=0.95Vout ))
CONDITIONS to 10.5k MIN. 4.5 1.5 Refer to Fig.2 45 55 1.26 (Note1) TYP. 55 65 1.29 1.0 MAX. 35 30 2.0 2.5 1.32 0.5 10 UNIT V V % % dB V % V mA
IO=5mA 2A VIN=11V~28V Cref=0 Cref=3.3 F
Vref TC Vref VD IQ Tj=0~125 IO=2A IO=0A
BLOCK DIAGRAM
VIN 1 2 VOUT
+
4 VADJ
BANDGAP REFERENCE
ASO PROTECTION
OVER HEAT PROTECTION
3 GND
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Revision No : 0
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KIA278R00PI
Fig. 1 Standard Test Circuit
1
2 R2 A 4 3 Io
VIN 0.33F A Iq R1 470 47F RL
V
VOUT = Vref x ( 1 + R1 ) = 1.29 x ( 1 + R1 )
R2
R2
Fig. 2 Ripple Rejection Circuit
1
+ _
2 R2 Cref 3.3F
ein 4 3
A
Io
+ _ VIN 0.33F A IQ R1 470 47F RL
V
f=120Hz(sine wave) ei=0.5Vrms RR=20log(ei/eo)
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Revision No : 0
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KIA278R00PI
Fig. 3 Ta - PD
P D1 : No heat sink p D 2 : With infinite heat sink
Fig. 4
RELATIVE OUTPUT VOLTAGE (%) 100 80 60 40 20 0 0 1.0
I O - VO
20 POWER DISSIPATION (W)
PD 2
15
10
5
PD1
0 -25
0
50
100
150
2.0
3.0
4.0
AMBIENT TEMPERATURE Ta ( C) Note) Oblique line portion : Overheat protection may operate in this area.
OUTPUT CURRENT I O (A)
Fig. 5 T j REFERENCE VOLTAGE DEVIATION Vref (mV) 10
R1=470, R2=3.2K V IN =15V I O =1.0A
VO
15 OUTPUT VOLTAGE Vo (V)
Fig. 6 VIN - VO
R1=470, R2=3.2K T j =25 C
5
10
RL=
0
5
R L=5
-5
-10 -25 0 25 50 75 100 125
0 0 5 10 15
JUNCTION TEMPERATURE T j ( C)
INPUT VOLTAGE VIN (V)
Fig. 7 T j - VD
0.5 0.4 0.3 0.2
I O=1A I O =2A I O=1.5A
Fig. 8 T j - I q
10 QUIESCENT CURRENT I q (mA) 8 6 4 2
V IN =35V I O =0
DROPOUT VOLTAGE VD (V)
0.1 0 -25 0 25 50
I O =0.5A
0
75 100 125 -25 0 25 50 75 100 125
JUNCTION TEMPERATURE T j ( C)
JUNCTION TEMPERATURE Tj ( C)
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Revision No : 0
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KIA278R00PI
Fig. 9 f - RR
80 RIPPLE REJECTION RR (dB)
Cref=3.3F Cref=0
Fig. 10 I O - RR
80 RIPPLE REJECTION RR (dB) 70
Cref=3.3F
70 60 50 40 30 20 10 0 0.1
60
Cref=0
R1=470, R2=3.2K I O =1A T j =25 C ei=0.5Vrms RR=20 log (ei/eo)
50 40 30
R1=470, R2=3.2K T j =25 C ei=0.5Vrms f=120Hz (sine wave) RR=20 log (ei/eo)
1
10
100
0.1
0.5 OUTPUT CURRENT I O (A)
1.0
INPUT RIPPLE FREQUENCY f (kHz)
2004. 3. 9
Revision No : 0
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