Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
 |
| LM117/LM317A/LM317 3-Terminal Adjustable Regulator |
1017
Kbytes |
21-Oct-08 |
Download |
LM117/LM317A/LM317 3-Terminal Adjustable Regulator (Japanese)
 |
743 Kbytes |
|
 |
Package Availability, Models, Samples & Pricing
| Obsolete Part | Alternate Part or
Supplier | Source | Last Time Buy Date |
LM317A MWC
| LM117H MD8
| NATIONAL SEMICONDUCTOR
| 01 Dec 2009
|
LM317AS
| NONE
| NONE
| 03 Sep 2002
|
LM317ASX
| NONE
| NONE
| 03 Sep 2002
|
LM317K MDC
| A317
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
LM317K MWC
| A317
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
LM317L MWA
| NONE
| NATIONAL SEMICONDUCTOR
| 01 Dec 2009
|
LM317LIBP
| NONE
| NATIONAL SEMICONDUCTOR
| 24 Jul 2009
|
LM317LIBPX
| NONE
| NATIONAL SEMICONDUCTOR
| 24 Jul 2009
|
General Description
The LM117 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 LM117 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 LM117 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, it 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 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317AEMP | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317AEMPX | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317AMDT | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317AMDTX | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317AT | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317EMP | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317EMPX | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317MDT | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317MDTX | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317S | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317SX | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
|
LM317T | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
|
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 |
|
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 |
|
 |
| 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 |
|
|
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
 |
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
|
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
|
362 Kbytes |
|
|
[Information as of 7-Nov-2009]
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