Datasheet

2000. 9. 20 13/16
KIA78L05F~KIA78L24F
Revision No : 5
V
OUT
0.1µF
0.33µF
V
IN
(1) STANDARD APPLICATION
KIA78LxxF
V
OUT
IN
V
1
2
3
R
SD
0.33µF
0.1µF
D1
(2) A. CURRENT BOOST VOLTAGE REGULATOR
D1
:
Protection Diode
High speed diode D1 should be
connected as shown in the figure
might occur by surge voltage or
if the condition
V
IN
V
OUT
<
power supply ON/OFF.
R
:
SD
Power limiting resistor
for large V
IN
,
resistor R
SD
is
needed to limit IC power
dissipation.
B. SHORT-CIRCUIT PROTECTION
IN
V
0.33µF
0.1µF
OUT
V
31
2
R1
Q1
I
Quiescent current of IC
:
Heat sink is needed for Q1
R1
V
BE1
B
I
where,
BE1
V
:
V
BE
of external
transistor Q1
31
2
R
SC
Q2
R1
current
Short-Circuit
:
I
SC
where,
I
SC
BE2
V
R
SC
=
2
1
3
0.33µF
R
(3) CURRENT REGULATOR
V
IN
I
OUT
=
OUT
I
V
OUT
R
+
I
B
KIA78LxxF
KIA78LxxF
KIA78LxxF
(MAX)
Q1
B(MAX)
<
=
EXAMPLS OF TYPICAL CIRCUIT