LM317L_05 Datasheet, PDF (1/12 Pages) ON Semiconductor – 100 mA Adjustable Output, Positive Voltage Regulator

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
• 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
Simplified Application
V_in
C_in*
0.1mF
LM317L
I_Adj
Adjust
R₂
V_out
R₁
240
+ _CO**
1.0mF
http://onsemi.com
LOW CURRENT
THREE−TERMINAL
ADJUSTABLE POSITIVE
VOLTAGE REGULATOR
SOIC−8
D SUFFIX
CASE 751 ⁸
1
Pin 1. V_in
2. V_out
3. V_out
4. Adjust
5. N.C.
6. V_out
7. V_out
8. N.C.
TO−92
Z SUFFIX
CASE 29
1
2
3
Pin 1. Adjust
2. V_out
3. V_in
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
* 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.
ǒ Ǔ Vout + 1.25 V
1
)
R2
R1
) IAdj R2
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