RoHS Compliance Information	Size in Kbytes	Date
LM117/LM317A/LM317 3-Terminal Adjustable Regulator	1005 Kbytes	9-Apr-07	View Online	Download	Receive via Email
LM117/LM317A/LM317 3-Terminal Adjustable Regulator (Japanese)	743 Kbytes

Part Number

Package

Factory Lead Time

Models

Samples & Electronic Orders

Budgetary Pricing

Std Pack Size

Package Marking Format

Type

Pins

Spec.

MSL Rating

Peak Reflow

RoHS Report

CAD Symbols

Weeks

Qty

Qty

$US each

LM317AEMP

SOT-223

4

STD NOPB

1 1

260 260

RoHS

N/A

Full production

N/A

1K+

$0.72

reel of 1000

XYTT N07A

6 weeks

20000

LM317EMP

SOT-223

4

STD NOPB

1 1

260 260

RoHS

N/A

Full production

N/A

1K+

$0.49

reel of 1000

XYTT N01A

6 weeks

2000

LM317AEMPX

SOT-223

4

STD NOPB

1 1

260 260

RoHS

N/A

Full production

N/A

1K+

$0.72

reel of 2000

XYTT N07A

8 weeks

7500

LM317EMPX

SOT-223

4

STD NOPB

1 1

260 260

RoHS

N/A

Full production

N/A

1K+

$0.49

reel of 2000

XYTT N01A

6 weeks

15000

LM317AT

TO-220

3

STD NOPB

1 1

NA NA

RoHS

N/A

Full production

N/A

1K+

$0.71

rail of 45

NSUZXYTTE# LM317AT P+

8 weeks

2000

LM317T

TO-220

3

STD NOPB

1 1

NA NA

RoHS

N/A

Full production

N/A

1K+

$0.71

rail of 45

NSUZXYTTE# LM317T P+

6 weeks

2500

LM317AMDT

TO-252

3

STD NOPB

1 2

235 260

RoHS

N/A

Full production

N/A

1K+

$0.64

rail of 75

NSUZXYTT LM317 AMDT

8 weeks

1000

LM317MDT

TO-252

3

STD NOPB

1 2

235 260

RoHS

N/A

Full production

N/A

1K+

$0.54

rail of 75

NSUZXYTT LM317 MDT

8 weeks

7500

LM317AMDTX

TO-252

3

STD NOPB

1 2

235 260

RoHS

N/A

Full production

N/A

1K+

$0.64

reel of 2500

NSUZXYTT LM317 AMDT

6 weeks

10000

LM317MDTX

TO-252

3

STD NOPB

1 2

235 260

RoHS

N/A

Full production

N/A

1K+

$0.54

reel of 2500

NSUZXYTT LM317 MDT

8 weeks

3000

LM317S

TO-263

3

STD NOPB

3 3

235 245

RoHS

N/A

Full production

N/A

1K+

$0.79

rail of 45

NSUZXYTTE# LM317S P+

8 weeks

5000

LM317SX

TO-263

3

STD NOPB

3 3

235 245

RoHS

N/A

Full production

N/A

1K+

$0.79

reel of 500

NSUZXYTTE# LM317S P+

6 weeks

7500

LM317AH

TO-39

3

STD NOPB

1 1

NA NA

RoHS

N/A

Full production

N/A

1K+

$4.40

box of 500

NSZXYTTE# LM317AHP+

6 weeks

2500

LM317H

TO-39

3

STD NOPB

1 1

NA NA

RoHS

N/A

Full production

N/A

1K+

$4.40

box of 500

NSZXYTTE# LM317HP+

6 weeks

2000

LM317K STEEL

TO-3

2

STD NOPB

1 1

NA NA

RoHS

N/A

Full production

N/A

1K+

$15.90

tray of 50

NS ZXYTTE# LM317K STEELP+

6 weeks

500

LM317K MDC

Unpackaged Die

Lifetime buy

N/A

CALL

tray of N/A

-

N/A

N/A

LM317K MWC

Wafer

Lifetime buy

N/A

CALL

wafer jar of N/A

-

N/A

N/A

LM317A MWC

Wafer

Full production

N/A

CALL

wafer jar of N/A

-

N/A

40000

Obsolete Parts

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

Design Tools

Title	Size in Kbytes	Date
LM317MDT Qualification Package	803 Kbytes	19-Oct-1999	View Online	Download	Receive via Email

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Application Notes

Title	Size in Kbytes	Date
AN-181: Application Note 181 3-Terminal Regulator is Adjustable	165 Kbytes	3-Oct-02	View Online	Download	Receive via Email
AN-1164: Application Note 1164 LM3647 Reference Design User's Manual	197 Kbytes	9-Mar-01	View Online	Download	Receive via Email
AN-1165: Application Note 1165 Configuration Guide for LM3647 Reference Design	32 Kbytes	28-Sep-00	View Online	Download	Receive via Email
AN-1378: Application Note 1378 Method For Calculating Output Voltage Tolerances in Adjustable Regulators	647 Kbytes	15-Jul-05	View Online	Download	Receive via Email
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	View Online	Download	Receive via Email
AN-1651 (Chinese): Application Note 1651 Keeping Up with the Expanding Demands of High-Performance Audio	350 Kbytes