Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
 |
| LM117/LM317A/LM317 3-Terminal Adjustable Regulator |
1017
Kbytes |
21-Oct-08 |
Download |
| LM117JAN 3-Terminal Adjustable Regulator |
864
Kbytes |
14-Mar-06 |
Download |
| LM117QML 3-Terminal Adjustable Regulator |
956
Kbytes |
29-Jun-06 |
Download |
Package Availability, Models, Samples & Pricing
| Obsolete Part | Alternate Part or
Supplier | Source | Last Time Buy Date |
LM117H-MLS
| NONE
| NONE
| 08 Dec 1998
|
LM117H-SMD
| NONE
| NONE
| 16 Dec 1998
|
LM117H MDC
| NONE
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
LM117H MDS
| NONE
| NATIONAL SEMICONDUCTOR
| 01 Dec 2009
|
LM117H MW8
| A117
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
LM117HVH-MLS
| LM117HVHRQMLV
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
LM117HVH-SMD
| NONE
| NONE
| 16 Dec 1998
|
LM117HVH MD8
| NONE
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
LM117HVK-MLS
| LM117HVK/883
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
LM117HVK-SMD
| NONE
| NONE
| 16 Dec 1998
|
LM117HVKG MW8
| NONE
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
LM117K-SMD
| NONE
| NONE
| 16 Dec 1998
|
LM117K MDS
| A117
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
LM117KG MW8
| A117
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
LM117WG-MPR
| NONE
| NATIONAL SEMICONDUCTOR
| 16 Nov 2008
|
LM117WG-QMLV
| NONE
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
LM117WG/883
| NONE
| NATIONAL SEMICONDUCTOR
| 03 Dec 2008
|
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.
Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-181: Application Note 181 3-Terminal Regulator Is Adjustable |
165
Kbytes |
1-May-04 |
Download |
More Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-242: Application Note 242 Applying a New Precision Op Amp |
383
Kbytes |
4-Oct-04 |
Download |
| AN-241: Application Note 241 Working with High Impedance Op Amps |
130
Kbytes |
4-Oct-04 |
Download |
| AN-97: Application Note 97 Versatile Timer Operates from Microseconds to Hours |
457
Kbytes |
24-Feb-99 |
Download |
| AN-79: Application Note 79 IC Preamplifier Challenges Choppers on Drift |
380
Kbytes |
1-Oct-02 |
Download |
| AN-182: Application Note 182 Improving Power Supply Reliability with IC Power Regulators |
27
Kbytes |
3-Oct-02 |
Download |
| AN-222: Application Note 222 Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise |
399
Kbytes |
1-Oct-02 |
Download |
| AN-298: Application Note 298 Isolation Techniques for Signal Conditioning |
379
Kbytes |
2-Oct-02 |
Download |
| AN-173: Application Note 173 IC Zener Eases Reference Design |
54
Kbytes |
1-Oct-02 |
Download |
| AN-240: Application Note 240 Wide-Range Current-to-Frequency Converters |
126
Kbytes |
3-Oct-02 |
Download |
| AN-178: Application Note 178 Applications for an Adjustable IC Power Regulator |
40
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-56: 1.2 Volt Reference |
116
Kbytes |
4-Nov-95 |
Download |
AN-56 (Chinese): 1.2 Volt Reference
|
291 Kbytes |
|
 |
| AN-A: The Monolithic Operational Amplifier: A Tutorial Study |
342
Kbytes |
4-Nov-95 |
Download |
| AN-41: Application Note 41 Precision IC Comparator Runs from +5V Logic Supply |
150
Kbytes |
2-Oct-02 |
Download |
| AN-110: Application Note 110 Fast IC Power Transistor with Thermal Protection |
333
Kbytes |
3-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-46: The Phase Locked Loop IC as a Communication System Building Block |
277
Kbytes |
4-Nov-95 |
Download |
| AN-299: Application Note 299 Audio Applications of Linear Integrated Circuits |
232
Kbytes |
24-Feb-99 |
Download |
[Information as of 8-Nov-2009]
|
