2002 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.3
Features
Output Current in Excess of 100mA
Output Adjustable Between 1.2V and 37V
Internal Thermal Overload Protection
Internal Short Circuit Current-Limiting
Output Transistor Safe Area Compensation
Floating Operation For High Voltage Applications
Description
The KA317L is a 3-terminal adjustable positive voltage
regulator capable of supplying in excess of 100mA over an
output voltage range of 1 .2V to 37V. This voltage regulator
is exceptionally easy to use and requires only two external
resistors to set the output voltage.
TO-92
1. Adj 2. Output 3. Input
1
Internal Block Diagram
Rlimit
3
Vin
Vo
1
Voltage
Reference
Vadj
2
Protection
Circuitry
+
-
Input
Output
KA317L
3-Terminal 0.1A Positive Adjustable Regulator
KA317L
2
Absolute Maximum Ratings
Electrical Characteristics
(V
I
- V
O
= 5V, I
O
= 40mA, 0
C
T
J
+125
C, P
DMAX
= 625mW, unless otherwise specified)
Load and Line regulation are specified at constant junction temperature. Change in V
O
due to heating effects must be taken
into account separately. Pulse testing with low duty cycle is used.
Parameter
Symbol
Value
Unit
Input-Output Voltage Differential
V
I
- V
O
40
V
Power Dissipation
P
D
Internally limited
W
Operating Junction Temperature Range
T
j
0 ~ +125
C
Storage Temperature Range
T
STG
-65 ~+125
C
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
*Line Regulation
R
line
T
A
= +25
C
3V
V
I
-
V
O
40V
-
0.01
0.04
%/V
3V
V
I
-
V
O
40V
-
0.02
0.07
*Load Regulation
R
loal
T
A
= +25
C
10mA
I
O
100mA
V
O
5V
V
O
5V
-
5
0.1
25
0.5
mV
%/ V
O
10mA
I
O
100mA
V
O
5V
V
O
5V
-
20
0.3
70
1.5
mV
%/ V
O
Adjustment Pin Current
I
ADJ
-
-
50
100
A
Adjustment Pin Current Change
I
ADJ
3V
V
I
- V
O
40V
10mA
I
O
100mA
P
D
<
P
DMAX
-
0.2
5
A
Reference Voltage
V
REF
3V
<
V
I
- V
O
<
40V
10mA
I
O
100mA
P
D
P
DMAX
1.20
1.25
1.30
V
Temperature Stability
ST
T
-
-
0.7
-
%
Minimum Load Current to
Maintain Regulation
I
L(MIN)
V
I
- V
O
= 40V
-
3.5
10
mA
Maximum Output Current
I
O(MAX)
V
I
- V
O
15V
P
D
<
P
DMAX
100
200
-
mA
V
I
- V
O
40V
P
D
<
P
DMAX
, T
A
= +25
C
25
50
-
RMS Noise, % of V
OUT
e
N
T
A
=+ 25
C
10Hz
<
f
<
10KHz
-
0.003
-
%/ V
O
Ripple Rejection
RR
V
O
= 10V, f = 120Hz
without C
ADJ
C
ADJ
= 10uF
66
65
80
-
dB
Long-Term Stability
ST
T
J
= +125
C, 1000 Hours
-
0.3
-
%
KA317L
3
Typical Application
Figure 1. 5V Electronic Shutdown Regulator
D1 protects the device during an input short circuit.
Figure 2. Slow Turn-On Regulator
Figure 3. Current Regulator
Input
Output
KA317L
Input
Output
KA317L
Input
Output
KA317L
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