LM317
3-TERMINAL ADJUSTABLE REGULATORS
ELECTRICAL CHARACTERISTICS
Uniess otherwise noted
,these specifications apply for the following test conditions:
Vi-Vo=5V and Io=0.5A. For conditions
shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
PARAMETER
Input Regulation*2
Ripple Rejection
TEST CONDITIONS
V
I
-V
O
=3V to 40V *3
T
J
=MIN to MAX
I
O
=10mA to 1.5A
MIN TYP MAX
0.01
0.02
65
66
80
5
0.1
20
0.3
1
0.3
0.003
3.5
1.5
0.15
2.2
0.4
50
0.2
1.20
1.25
25
0.5
70
1.5
1
10
0.04
0.07
UNIT
%/V
dB
mV
%
mV
%
%
%
%
mA
A
Output Regulation
Output Voltage Change With Temperature
Output Voltage long-term Drift*4
Output Noise Voltage
Minimum Output Current to Maintain
V
I
-V
O
=40V
Regulation
V
I
-V
O
≤15V
Peak Output Current
V
I
-V
O
≤40V,
T
J
=25
Adjustment-terminal Current
V
I
-V
O
=2.5V to 40V,
Change in adjustment-terminal Current
I
O
=10mA to 1.5A
V
I-
V
O
=3V to 40V, IO=10mA to 1.5A,
Reference Voltage(Output to ADJ)
P≤15W
*1
*2
*3
*4
V
O
=10V, f=120HZ
V
O
=10V, f=120HZ
10-µF capacitor between ADJ and ground
I
O
=10mA TO 1.5A,
V
O
≤5V
T
J
=25℃*3,
V
O
>5V
V
O
≥5V
I
O
=10mA to 1.5A
*3
V
O
>5V
T
J
=MIN to MAX
After 1000h at T
J
= MAX and VI-VO=40V
f=10Hz to 10kHz, T
J
=25℃
100
5.0
1.30
µA
µA
V
All characteristics are measured with a 0.1-µF capacitor across the input and a 1-µF capacitor across the output.
Input regulation is expressed here as the percentage change in output voltage per 1-V change at the input
Pulse testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible.
Thermal effects must be taken into account separately.
Since long-term drift cannot be measured on the individual devices prior to shipment. This specification is not intended to be a guarantee or warranty. It
is an engineering estimate of the average drift to be expected from lot to lot.
TYPICAL APPLICATION DATA
REG
V
I
IN
ADJ
OUT
R
1
240
V
0
See Note 3
C
1
=0.1 F
C
2
=1 F
R
2
See Note 1
See Note 2
Output
voltage is calculated from
V
O
= V
REF
{ 1+
R
2
R
1
}
1.
2.
3.
Use of an input bypass capacitor is recommended if regulator is far from filter capacitors.
Use of an output capacitor improves transient response but is optional.
V
REF
equals the difference between the output and adjustment terminal voltages.
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