LM117 - 3-Terminal Adjustable Regulator

Datasheet Packaging Samples & Pricing Application Notes Knowledge Base

Features
•Guaranteed 1% output voltage tolerance (LM317A)
•Guaranteed max. 0.01%/V line regulation (LM317A)
•Guaranteed max. 0.3% load regulation (LM117)
•Guaranteed 1.5A output current
•Adjustable output down to 1.2V
•Current limit constant with temperature
•P + Product Enhancement tested
•80 dB ripple rejection
•Output is short-circuit protected

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. More...


  Typical Application
*click for larger image


Parametric Table     expand
Parametric Table    collapse
Output Current 1500, 500 mA
Input Min Voltage 4.2 Volt
Input Max Voltage 40 Volt
Adjustable Output Yes
On/Off Pin No
Error Flag No
Temperature Min -55 deg C
Temperature Max 125, 150 deg C
Output Current 1500, 500 mA
Input Min Voltage 4.2 Volt
Input Max Voltage 40 Volt
Adjustable Output Yes
On/Off Pin No
Error Flag No
Temperature Min -55 deg C
Temperature Max 125, 150 deg C
RegType Linear Regulator
View Using Catalog


Typical Performance

*click for larger image


  Also Recommended
LM2941Lower Dropout Voltage, +/- Transient Protection

Additional Resources

Application Notes (see below)


Connection Diagram

*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM117/LM317A/LM317 3-Terminal Adjustable Regulator 1017 Kbytes 21-Oct-08 View Online
Download
LM117JAN 3-Terminal Adjustable Regulator 864 Kbytes 14-Mar-06 View Online
Download
LM117QML 3-Terminal Adjustable Regulator 956 Kbytes 29-Jun-06 View Online
Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM117HTO-393STD
NOPB		1
1		NA
NA		RoHS Download Full productionN/A
 
Buy Now 		1K+$4.65box
of
500		NSZXYTTE# LM117HP+
6 weeks2000
LM117K STEELTO-32STD
NOPB		1
1		NA
NA		RoHS Download Full productionN/A
 
Buy Now 		1K+$15.90tray
of
50		NS
ZXYTTE#
LM117K
STEELP+
6 weeks500
LM117H MD8Unpackaged DieFull productionN/A
  CALLtray
of
N/A		-
N/A3000
LM117KG MD8Unpackaged DieFull productionN/A
  CALLtray
of
N/A		-
N/A2000
LM117H MW8WaferLifetime buyN/A
  CALLwafer jar
of
N/A		-
N/AN/A
LM117KG MW8WaferLifetime buyN/A
  CALLwafer jar
of
N/A		-
N/AN/A
LM117E/883LCC20STD1NARoHS Download Full productionN/A
 50+$29.60rail
of
50		NSZSSXXYYA
LM117E
/883 Q
25 weeks500
LM117H/883TO-393STD1NARoHS Download Full productionN/A
 
Buy Now 		50+$15.40tray
of
20		NSZSSXXYYA LM117H/883 Q
8 weeks500
LM117K/883TO-32STD1NARoHS Download Full productionN/A
 
Buy Now 		50+$27.10tray
of
50		NSZSSXXYYA
LM117K/883
Q
8 weeks500
LM117WG/883CERPACK16STD1NARoHS Download Lifetime buyN/A
 
Buy Now 		50+$71.00tray
of
42		NSZSSXXYYA
LM117WG/883 Q
10 weeks100
JM38510/11703BXA
(JL117BXA)		TO-393RoHS Download Full productionN/A
 
Buy Now 		50+$19.70tray
of
20		NS ZSSXXYYA 27014 Q
JM38510/11703BXA
6 weeks500
JM38510/11704BYA
(JL117BYA)		TO-32RoHS Download Lifetime buyN/A
 50+$54.90tray
of
50		NSZSSXXYYA
JM38510/
11704BYA
27014 Q
6 weeks100
JL117SXATO-393STD1NARoHS Download Lifetime buyN/A
  CALLtray
of
N/A		NS ZSSXXYYA 27014 Q
JM38510/11703SXA
N/A100
5962R9951705VXA
(LM117HRLQMLV)		TO-393RoHS Download Full productionN/A
 50+$284.00tray
of
20		NSZSSXXYYA 5962R99517
05VXA LM117HRLQV Q
N/A500
5962R9951703VXA
(LM117HRQMLV)		TO-393RoHS Download Full productionN/A
 50+$268.00tray
of
20		NSZSSXXYYA
03VXA LM117HRQV Q
N/A500
JM38510/11704SYA
(JL117SYA)		TO-32RoHS Download Lifetime buyN/A
 
Buy Now 		50+$422.00tray
of
50		NSZSSXXYYA
JM38510/
11704SYA
27014 Q
N/A100
LM117KRQMLVTO-32STD1NARoHS Download Full productionN/A
 50+$422.00tray
of
50		NSZSSXXYYA
R9951704VYA
LM117KRQV Q
N/A100
LM117WG-QMLVCERPACK16STD1NARoHS Download Lifetime buyN/A
  CALLtray
of
N/A		NSZSSXXYYA
LM117WG-
QV Q 5962-
9951703VZA
N/A500
5962R9951705VZA
(LM117WGRLQMLV)		CERPACK16RoHS Download Full productionN/A
 50+$284.00tray
of
42		NSZSSXXYYA
LM117WGRL
QV Q 5962R
9951705VZA
N/A50
5962R9951703VZA
(LM117WGRQMLV)		CERPACK16RoHS Download Full productionN/A
 50+$230.00tray
of
42		NSZSSXXYYA
LM117WGR
QV Q 5962R
9951703VZA
N/A100
LM117H MDSUnpackaged DieLifetime buyN/A
  CALLtray
of
N/A		-
N/A500
LM117K MDSUnpackaged DieLifetime buyN/A
  CALLtray
of
N/A		-
N/AN/A
LM117H MDEUnpackaged DieFull productionN/A
  CALLtray
of
N/A		-
N/AN/A
LM117H MDRUnpackaged DieFull productionN/A
  CALLtray
of
N/A		-
N/AN/A

Obsolete Parts

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM117AH
LM117H
NATIONAL SEMICONDUCTOR
06/14/94
LM117AH/883
LM117H/883
NATIONAL SEMICONDUCTOR
10/01/94
LM117AK
LM117K STEEL
NATIONAL SEMICONDUCTOR
06/14/94
LM117AK/883
LM117K/883
NATIONAL SEMICONDUCTOR
10/01/94
LM117H-MLS
JL117SXA
NATIONAL SEMICONDUCTOR
12/08/98
LM117H-SMD
LM177H/883
NATIONAL SEMICONDUCTOR
12/16/98
LM117H MDC
NONE
NONE
12/03/2008
LM117H MW8
UA117
NATIONAL SEMICONDUCTOR CORP
12/03/2008
LM117H MW8
ľA117
NATIONAL SEMICONDUCTOR CORP
12/03/2008
LM117HVH-MLS
LM117HVHRQMLV
NSC
12/03/2008
LM117HVH-SMD
LM117HVH/883
NATIONAL SEMICONDUCTOR
12/16/98
LM117HVH MD8
NONE
NONE
12/03/2008
LM117HVK-MLS
LM117HVK/883
NSC
12/03/2008
LM117HVK-SMD
LM117HVK/883
NATIONAL SEMICONDUCTOR
12/16/98
LM117HVK STEEL
LM317HVK STEEL
NATIONAL SEMICONDUCTOR
07/15/95
LM117HVKG MW8
NONE
NONE
12/03/2008
LM117K-SMD
LM117K/883
NATIONAL SEMICONDUCTOR
12/16/98
LM117K MDS
UA117
NATIONAL SEMICONDUCTOR CORP
12/03/2008
LM117K MDS
ľA117
NATIONAL SEMICONDUCTOR CORP
12/03/2008
LM117KG MW8
UA117
NATIONAL SEMICONDUCTOR CORP
12/03/2008
LM117KG MW8
ľA117
NATIONAL SEMICONDUCTOR CORP
12/03/2008
LM117WG-MPR
UA117
NATIONAL SEMICONDUCTOR CORP
11/16/2008
LM117WG-MPR
ľA117
NATIONAL SEMICONDUCTOR CORP
11/16/2008
LM117WG-QMLV
LM117WGRQMLV
NATIONAL SEMICONDUCTOR CORP
12/03/2008
LM117WG-QMLV
UA117
NATIONAL SEMICONDUCTOR CORP
12/03/2008
LM117WG/883
LM117H/883
NATIONAL SEMICONDUCTOR CORP
12/03/2008
LM117WG/883
UA117
NATIONAL SEMICONDUCTOR CORP
12/03/2008

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

TitleSize in Kbytes Date Click link below to Download
AN-181: Application Note 181 3-Terminal Regulator is Adjustable 165 Kbytes 3-Oct-02 Download
AN-178: Application Note 178 Applications for an Adjustable IC Power Regulator 115 Kbytes 3-Oct-02 Download
AN-173: Application Note 173 IC Zener Eases Reference Design 83 Kbytes 1-Oct-02 Download
AN-182: Application Note 182 Improving Power Supply Reliability with IC Power Regulators 56 Kbytes 3-Oct-02 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

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 291 Kbytes  
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If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 21-Nov-2008]