LM317L
100 mA Adjustable Output,
Positive Voltage Regulator
The LM317L is an adjustable 3−terminal positive voltage regulator
capable of supplying in excess of 100 mA over an output voltage range
of 1.2 V to 37 V. This voltage regulator is exceptionally easy to use
and requires only two external resistors to set the output voltage.
Further, it employs internal current limiting, thermal shutdown and
safe area compensation, making them essentially blow−out proof.
The LM317L serves a wide variety of applications including local,
on card regulation. This device can also be used to make a
programmable output regulator, or by connecting a fixed resistor
between the adjustment and output, the LM317L can be used as a
precision current regulator.
Features
http://onsemi.com
LOW CURRENT
THREE−TERMINAL
ADJUSTABLE POSITIVE
VOLTAGE REGULATOR
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Pb−Free Packages are Available
Output Current in Excess of 100 mA
Output Adjustable Between 1.2 V and 37 V
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting
Output Transistor Safe−Area Compensation
Floating Operation for High Voltage Applications
Standard 3−Lead Transistor Package
Eliminates Stocking Many Fixed Voltages
SOIC−8
D SUFFIX
CASE 751
8
1
Pin 1.
2.
3.
4.
5.
6.
7.
8.
V
in
V
out
V
out
Adjust
N.C.
V
out
V
out
N.C.
TO−92
Z SUFFIX
CASE 29
Pin 1. Adjust
2. V
out
3. V
in
1
2
3
Simplified Application
V
in
V
out
LM317L
ORDERING INFORMATION
R
1
240
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
I
Adj
C
in
*
0.1mF
Adjust
+ C **
O
1.0mF
R
2
* C
in
is required if regulator is located an appreciable
**
distance from power supply filter.
** C
O
is not needed for stability, however,
**
it does improve transient response.
R
Vout
+
1.25 V 1
)
2
)
IAdj R2
R1
Since I
Adj
is controlled to less than 100
mA,
the error
associated with this term is negligible in most applications.
©
Semiconductor Components Industries, LLC, 2005
1
October, 2005 − Rev. 8
Publication Order Number:
LM317L/D
ONSEMI [ ON SEMICONDUCTOR ]
