Specifications
| Output Current |
1500, 1000, 500 mA |
| Input Min Voltage |
4.2 Volt |
| Input Max Voltage |
40, 37 Volt |
| Adjustable Output |
Yes |
| On/Off Pin |
No |
| Error Flag |
No |
| Temperature Min |
-40, 0 deg C |
| Temperature Max |
125 deg C |
| RegType |
Linear Regulator |
| View Using Catalog |
| LM317T |
Full Production |
RoHS Compliant |
$0.396 |
TO-220 |
3 |
RAIL |
T03B |
Line 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&3 (3-Digit Date Code)
&K Line 3: LM317 |
* Fairchild 1,000 piece Budgetary Pricing
|
| ** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples |
Package marking information for product LM317 is available. Click here for more information . |
DescriptionThe LM317 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to 37V output range. They are exceptionally easy to use and require only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators. Also, the LM117 is packaged in standard transistor packages which are easily mounted and handled.
In addition to higher performance than fixed regulators, the LM317 series offers full overload protection available only in IC's. Included on the chip are current limit, thermal overload protection and safe area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is disconnected.
Normally, no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors in which case an input bypass is needed. An optional output capacitor can be added to improve transient response. The adjustment terminal can be bypassed to achieve very high ripple rejection ratios which are difficult to achieve with standard 3-terminal regulators.
Besides replacing fixed regulators, the LM317 is useful in a wide variety of other applications. Since the regulator is "floating" and sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input to output differential is not exceeded, i.e., avoid short-circuiting the output.
Also, LM317 makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment pin and output, the LM117 can be used as a precision current regulator. Supplies with electronic shutdown can be achieved by clamping the adjustment terminal to ground which programs the output to 1.2V where most loads draw little current.
For applications requiring greater output current, see LM150 series (3A) and LM138 series (5A) data sheets. For the negative complement, see LM137 series data sheet.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM317A MWC |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317AEMP |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317AEMPX |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317AMDT |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317AMDTX |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317AT |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317EMP |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317EMPX |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317MDT |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317MDTX |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317S |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317SX |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
| LM317T |
SLM |
0 |
42786 |
0 |
0 |
3352500 |
2 |
951281028 |
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.For more information on Reliability Metrics, please click here.
Design Tools
| Title |
Size in Kbytes |
Date |
|
|
|
| LM317MDT Qualification Package |
803 Kbytes |
19-Oct-1999 |
View Online |
Download |
|
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-181: Application Note 181 3-Terminal Regulator Is Adjustable |
165 Kbytes |
1-May-04 |
Download |
| AN-1164: Application Note 1164 LM3647 Reference Design User`s Manual |
196 Kbytes |
14-May-04 |
Download |
| AN-1165: Application Note 1165 Configuration Guide for LM3647 Reference Design |
32 Kbytes |
15-May-04 |
Download |
| AN-1378: Application Note 1378 Method For Calculating Output Voltage Tolerances in Adjustable Regulators |
647 Kbytes |
15-Jul-05 |
Download |
AN-1378 (Chinese): Application Note 1378 Method For Calculating Output Voltage Tolerances in Adjustable Regulators
|
383 Kbytes |
|
640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> |
| AN-1651: Application Note 1651 Keeping Up with the Expanding Demands of High-Performance Audio |
206 Kbytes |
10-Jul-07 |
Download |
AN-1651 (Chinese): Application Note 1651 Keeping Up with the Expanding Demands of High-Performance Audio
|
350 Kbytes |
|
640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> |
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
More Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-298: Application Note 298 Isolation Techniques for Signal Conditioning |
379 Kbytes |
2-Oct-02 |
Download |
| AN-103: Application Note 103 LM340 Series Three Terminal Positive Regulators |
421 Kbytes |
3-Oct-02 |
Download |
| AN-263: Application Note 263 Sine Wave Generation Techniques |
350 Kbytes |
26-May-09 |
Download |
| AN-293: Application Note 293 Control Applications of CMOS DACs |
385 Kbytes |
4-Oct-04 |
Download |
| AN-288: Application Note 288 System-Oriented DC-DC Conversion Techniques |
405 Kbytes |
3-Oct-02 |
Download |
| AN-260: Application Note 260 A 20-Bit (1 ppm) Linear Slope-Integrating A/D Converter |
148 Kbytes |
3-Oct-02 |
Download |
| AN-446: A 150W IC Op Amp Simplifies Design of Power Circuits |
252 Kbytes |
4-Nov-95 |
Download |
| AN-301: Application Note 301 Signal Conditioning for Sophisticated Transducers |
579 Kbytes |
2-Oct-02 |
Download |
| AN-271: Application Note 271 Applying the New CMOS MICRO-DAC |
230 Kbytes |
4-Oct-04 |
Download |
AN-271 (Japanese): Application Note 271 Applying the New CMOS MICRO-DAC
640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> |
342 Kbytes |
|
|
| AN-294: Application Note 294 Special Sample and Hold Techniques |
233 Kbytes |
4-Oct-04 |
Download |
| AN-307: Application Note 307 Introducing the MF10: A Versatile Monolithic Active Filter Building Block |
384 Kbytes |
10-Oct-02 |
Download |
AN-307 (Japanese): Application Note 307 Introducing the MF10: A Versatile Monolithic Active Filter Building Block
640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> |
402 Kbytes |
|
|
| AN-828: Application Note 828 Increasing the High Speed Torque of Bipolar Stepper Motors |
808 Kbytes |
1-Oct-02 |
Download |
AN-828 (Japanese): Application Note 828 Increasing the High Speed Torque of Bipolar Stepper Motors
640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> |
362 Kbytes |
|
|
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
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 37V. It employs internal current limiting, thermal shut-down and safe area compensation.
LM317 Data Sheet
