2001 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.0
Features
Output Current In Excess of 1. 5A
Output Adjustable Between 1. 2V and 57V
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting
Output Transistor Safe Area Compensation
TO-220 Package
Description
This monolithic integrated circuit is an adjustable 3-terminal
positive voltage regulator designed to supply more than 1.5A
of load current with an output voltage adjustable over a 1.2
to 57V. It employs internal current limiting, thermal shut
down and safe area compensation.
TO-220
1. Adj 2. Output 3. Input
1
Internal Block Diagram
Rlimit
3
Vin
Vo
1
Voltage
Reference
Vadj
2
Protection
Circuitry
+
-
Input
Output
KA317HV
3-Terminal Positive Adjustable Regulator
KA317HV
2
Absolute Maximum Ratings
Electrical Characteristics
(V
I
-V
O
=5V, I
O
= 0.5A, 0
C
T
J
+ 125
C, I
MAX
= 1.5A,
P
DMAX
=20W, unless otherwise specified)
Note :
1. Load and line regulation are specified at constant junction temperature. Change in V
D
due to heating effects must be taken
into account separately. Pulse testing with low duty is used. (P
MAX
= 20W)
2. C
ADJ
, when used, is connected between the adjustment pin and ground.
Parameter
Symbol
Value
Unit
Input-Output Voltage Differential
V
I
- V
O
60
V
Lead Temperature
T
LEAD
230
C
Power Dissipation
P
D
Internally limited
W
Operating Junction Temperature Range
T
j
0 ~ +125
C
Storage Temperature Range
T
STG
-65 ~+125
C
Temperature Coefficient of Output Voltage
Vo/
T
0.02
%/
C
Parameter
Symbol
Conditions
Min
Typ. Max.
Unit
Line Regulation (Note1)
Rline
T
A
= +25
C
3V
V
I
- V
O
60V
-
0.01
0.04
%/V
3V
V
I
- V
O
60V
-
0.02
0.07
%/V
Load Regulation (Note1)
Rload
T
A
= +25
C, 10mA
I
O
I
MAX
V
O
< 5V
V
O
5V
-
18
0.4
25
0.5
mV
%/V
O
10mA
I
O
I
MAX
V
O
< 5V
V
O
5V
-
40
0.8
70
1.5
mV
%/V
O
Adjustable Pin Current
I
ADJ
-
-
46
100
A
Adjustable Pin Current Change
I
ADJ
3V
V
I
- V
O
60V
10mA
I
O
I
MAX
P
D
P
MAX
-
2.0
5
A
Reference Voltage
V
REF
3V
V
IN
- V
O
60V
10mA
I
O
I
MAX
P
D
P
MAX
1.20
1.25
1.30
V
Temperature Stability
ST
T
-
-
0.7
-
%/V
O
Minimum Load Current to Maintain
Regulation
I
L(MIN)
V
I
- V
O
= 60V
-
3.5
12
mA
Maximum Output Current
I
O(MAX)
V
I
- V
O
15V, P
D
P
MAX
V
I
- V
O
60V, P
D
P
MAX
T
A
=25
C
1.0
2.2
0.3
-
A
RMS Noise, % of V
OUT
e
N
T
A
= +25
C, 10Hz
f
10KHz
-
0.003 0.01
%/V
O
Ripple Rejection
RR
V
O
= 10V, f = 120Hz
without C
ADJ
C
ADJ
= 10
F (Note2)
66
60
75
-
dB
Long-Term Stability, T
J
= T
HIGH
ST
T
A
= +25
C for end point
measurements, 1000HR
-
0.3
1
%
Thermal Resistance Junction to Case
R
JC
-
-
5
-
C/W
KA317HV
3
Typical Perfomance Characteristics
Figure 1. Load Regulation
Figure 3. Dropout Voltage
Figure 2. Adjustment Current
Figure 4. Reference Voltage
TEMPERATURE
(
C)
OUTPUT
VOL
T
AGE
DEVI
A
T
I
O
N
(
%)
TEMPERATURE
(
C)
I
N
PUT-
OUTPUT DI
F
F
ERENTI
AL(
V
)
TEMPERATURE
(
C)
ADJ
U
STMENT CURRENT
(
u
A)
TEMPERATURE
(
C)
REFERENC
E VOL
T
AGE(
V)
KA317HV
4
Typical Application
Figure 5. Programmable Regulator
C
i
is required when regulator is located an appreciable distance from power supply filter.
C
o
is not needed for stability, however, it does improve transient response.
Since I
ADJ
is controlled to less than 100
A, the error associated with this term is negligible in most applications.
V
I
KA317
Ci
0. 1
F
VI
Vo
Vadj
R
2
I
adj
V
O
= 1.25V (1+ R
2
/ R
1
)+I
adj
R
2
R
1
I
adj
Co
1
F
Input
Output
KA317HV
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