www.fairchildsemi.com
KA78XX/KA78XXA
3-Terminal 1A Positive Voltage Regulator
Features
•
•
•
•
•
Output Current up to 1A
Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24V
Thermal Overload Protection
Short Circuit Protection
Output Transistor Safe Operating Area Protection
Description
The KA78XX/KA78XXA series of three-terminal positive
regulator are available in the TO-220/D-PAK package and
with several fixed output voltages, making them useful in a
wide range of applications. Each type employs internal
current limiting, thermal shut down and safe operating area
protection, making it essentially indestructible. If adequate
heat sinking is provided, they can deliver over 1A output
current. Although designed primarily as fixed voltage
regulators, these devices can be used with external
components to obtain adjustable voltages and currents.
TO-220
1
D-PAK
1
1. Input 2. GND 3. Output
Internal Block Digram
Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
KA78XX/KA78XXA
Absolute Maximum Ratings
Parameter
Input Voltage (for V
O
= 5V to 18V)
(for V
O
= 24V)
Thermal Resistance Junction-Cases (TO-220)
Thermal Resistance Junction-Air (TO-220)
Operating Temperature Range (KA78XX/A/R)
Storage Temperature Range
Symbol
V
I
V
I
R
θJC
R
θJA
T
OPR
T
STG
Value
35
40
5
65
0 ~ +125
-65 ~ +150
°
Unit
V
V
C/W
°
°
°
C/W
C
C
Electrical Characteristics (KA7805/KA7805R)
(Refer to test circuit ,0
°
C < T
J
< 125
°
C, I
O
= 500mA, V
I
=10V, C
I
= 0.33µF, C
O
=0.1µF, unless otherwise specified)
Parameter
Symbol
T
J
=+25
o
C
Output Voltage
V
O
5.0mA
≤
Io
≤
1.0A, P
O
≤
15W
V
I
= 7V to 20V
T
J
=+25
o
C
T
J
=+25
o
C
T
J
=+25
o
C
I
O
= 5mA to 1.0A
V
I
= 7V to 25V
I
O
= 5mA
f = 10Hz to 100KHz, T
A
=+25
o
C
f = 120Hz
V
O
= 8V to 18V
I
O
= 1A, T
J
=+25
o
C
f = 1KHz
V
I
= 35V, T
A
=+25
o
C
T
J
=+25
o
C
V
O
= 7V to 25V
V
I
= 8V to 12V
I
O
= 5.0mA to1.5A
I
O
=250mA to 750mA
Conditions
KA7805
Min.
4.8
4.75
-
-
-
-
-
-
-
-
-
62
-
-
-
-
Typ. Max.
5.0
5.0
4.0
1.6
9
4
5.0
0.03
0.3
-0.8
42
73
2
15
230
2.2
5.2
5.25
100
50
100
50
8.0
0.5
1.3
-
-
-
-
-
-
-
V
mV
mV
mA
mA
mV/
o
C
µV/V
O
dB
V
mΩ
mA
A
Unit
Line Regulation (Note1)
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Output Resistance
Short Circuit Current
Peak Current
Regline
Regload
I
Q
∆I
Q
∆V
O
/∆T
V
N
RR
V
Drop
r
O
I
SC
I
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V
o
due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
2
KA78XX/KA78XXA
Electrical Characteristics (KA7806/KA7806R)
(Refer to test circuit ,0
°
C < T
J
< 125
°
C, I
O
= 500mA, V
I
=11V, C
I
= 0.33µF, C
O
=0.1µF, unless otherwise specified)
Parameter
Symbol
T
J
=+25
o
C
Output Voltage
V
O
5.0mA
≤
I
O
≤
1.0A, P
O
≤
15W
V
I
= 8.0V to 21V
T
J
=+25
o
C
T
J
=+25
o
C
T
J
=+25
o
C
I
O
= 5mA to 1A
V
I
= 8V to 25V
I
O
= 5mA
f = 10Hz to 100KHz, T
A
=+25
o
C
f = 120Hz
V
I
= 9V to 19V
I
O
= 1A, T
J
=+25
o
C
f = 1KHz
V
I
= 35V, T
A
=+25
o
C
T
J
=+25
o
C
V
I
= 8V to 25V
V
I
= 9V to 13V
I
O
=5mA to 1.5A
I
O
=250mA to750mA
Conditions
KA7806
Min. Typ. Max.
5.75
5.7
-
-
-
-
-
-
-
-
-
59
-
-
-
-
6.0
6.0
5
1.5
9
3
5.0
-
-
-0.8
45
75
2
19
250
2.2
6.25
6.3
120
60
120
60
8.0
0.5
1.3
-
-
-
-
-
-
-
V
mV
mV
mA
mA
mV/
o
C
µV/Vo
dB
V
mΩ
mA
A
Unit
Line Regulation (Note1)
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Output Resistance
Short Circuit Current
Peak Current
Regline
Regload
I
Q
∆I
Q
∆V
O
/∆T
V
N
RR
V
Drop
r
O
I
SC
I
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
3
KA78XX/KA78XXA
Electrical Characteristics (KA7808/KA7808R)
(Refer to test circuit ,0
°
C < T
J
< 125
°
C, I
O
= 500mA, V
I
=14V, C
I
= 0.33µF, C
O
=0.1µF, unless otherwise specified)
Parameter
Symbol
T
J
=+25
o
C
Output Voltage
V
O
5.0mA
≤
I
O
≤
1.0A, P
O
≤
15W
V
I
= 10.5V to 23V
T
J
=+25
o
C
V
I
= 10.5V to 25V
V
I
= 11.5V to 17V
I
O
= 5.0mA to 1.5A
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Output Resistance
Short Circuit Current
Peak Current
Regload
I
Q
∆I
Q
∆V
O
/∆T
V
N
RR
V
Drop
r
O
I
SC
I
PK
T
J
=+25
o
C
I
O
= 250mA to
750mA
Conditions
KA7808
Min.
7.7
7.6
-
-
-
-
-
-
-
-
-
56
-
-
-
-
Typ.
8.0
8.0
5.0
2.0
10
5.0
5.0
0.05
0.5
-0.8
52
73
2
17
230
2.2
Max.
8.3
8.4
160
80
160
80
8.0
0.5
1.0
-
-
-
-
-
-
-
mV
mA
mA
mV/
o
C
µV/Vo
dB
V
mΩ
mA
A
V
mV
Unit
Line Regulation (Note1)
Regline
T
J
=+25
o
C
I
O
= 5mA to 1.0A
V
I
= 10.5A to 25V
I
O
= 5mA
f = 10Hz to 100KHz, T
A
=+25
o
C
f = 120Hz, V
I
= 11.5V to 21.5V
I
O
= 1A, T
J
=+25
o
C
f = 1KHz
V
I
= 35V, T
A
=+25
o
C
T
J
=+25
o
C
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
4
KA78XX/KA78XXA
Electrical Characteristics (KA7809/KA7809R)
(Refer to test circuit ,0
°
C < T
J
< 125
°
C, I
O
= 500mA, V
I
=15V, C
I
= 0.33µF, C
O
=0.1µF, unless otherwise specified)
Parameter
Symbol
T
J
=+25
o
C
Output Voltage
V
O
5.0mA≤ I
O
≤1.0A,
P
O
≤15W
V
I
= 11.5V to 24V
T
J
=+25
o
C
T
J
=+25
o
C
T
J
=+25
o
C
I
O
= 5mA to 1.0A
V
I
= 11.5V to 26V
I
O
= 5mA
f = 10Hz to 100KHz, T
A
=+25
o
C
f = 120Hz
V
I
= 13V to 23V
I
O
= 1A, T
J
=+25
o
C
f = 1KHz
V
I
= 35V, T
A
=+25
o
C
T
J
= +25
o
C
V
I
= 11.5V to 25V
V
I
= 12V to 17V
I
O
= 5mA to 1.5A
I
O
= 250mA to 750mA
Conditions
KA7809
Min.
8.65
8.6
-
-
-
-
-
-
-
-
-
56
-
-
-
-
Typ.
9
9
6
2
12
4
5.0
-
-
-1
58
71
2
17
250
2.2
Max.
9.35
9.4
180
90
180
90
8.0
0.5
1.3
-
-
-
-
-
-
-
V
mV
mV
mA
mA
mV/
o
C
µV/Vo
dB
V
mΩ
mA
A
Unit
Line Regulation (Note1)
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Output Resistance
Short Circuit Current
Peak Current
Regline
Regload
I
Q
∆I
Q
∆V
O
/∆T
V
N
RR
V
Drop
r
O
I
SC
I
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
5
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