LM317LM/NOPB National Semiconductor, LM317LM/NOPB Datasheet

LM317LM/NOPB

Manufacturer Part Number

LM317LM/NOPB

Description

IC REG POSITIVE ADJ 8-SOIC

Manufacturer

National Semiconductor

Type

Voltage Regulatorr

Datasheets

1.LM317LITPNOPB.pdf (20 pages)

2.LM317LMNOPB.pdf (4 pages)

Specifications of LM317LM/NOPB

Regulator Topology

Positive Adjustable

Voltage - Output

1.2 ~ 37 V

Voltage - Input

4.2 ~ 40 V

Number Of Regulators

Current - Output

100mA

Current - Limit (min)

100mA

Operating Temperature

-25°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

8-SOIC (3.9mm Width)

Current, Output

100 mA

Package Type

SOIC-8

Regulation, Line

0.01 %/V

Regulation, Load

0.1 %

Regulator Type

Positive Voltage Out

Temperature, Operating, Range

-40 to +125 °C

Voltage, Input

40 V

Voltage, Noise

0.003 %

Voltage, Output

1.2 to 37 V

Voltage, Supply, Rejection Ratio

80 dB

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Voltage - Dropout (typical)

Lead Free Status / Rohs Status

RoHS Compliant part Electrostatic Device

Other names

*LM317LM
LM317LM

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LM317L

3-Terminal Adjustable Regulator

General Description

The LM317L is an adjustable 3-terminal positive voltage reg-

ulator capable of supplying 100mA over a 1.2V to 37V output

range. It is exceptionally easy to use and requires only two

external resistors to set the output voltage. Further, both line

and load regulation are better than standard fixed regulators.

Also, the LM317L is available packaged in a standard TO-92

transistor package which is easy to use.

In addition to higher performance than fixed regulators, the

LM317L offers full overload protection. Included on the chip

are current limit, thermal overload protection and safe area

protection. All overload protection circuitry remains fully func-

tional even if the adjustment terminal is disconnected.

Normally, no capacitors are needed unless the device is sit-

uated more than 6 inches from the input filter capacitors in

which case an input bypass is needed. An optional output ca-

pacitor 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 stan-

dard 3-terminal regulators.

Besides replacing fixed regulators, the LM317L is useful in a

wide variety of other applications. Since the regulator is “float-

ing” 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.

Also, it makes an especially simple adjustable switching reg-

ulator, a programmable output regulator, or by connecting a

Connection Diagrams

TO-92 Plastic package

906404

fixed resistor between the adjustment and output, the LM317L

can be used as a precision current regulator. Supplies with

electronic shutdown can be achieved by clamping the adjust-

ment terminal to ground which programs the output to 1.2V

where most loads draw little current.

The LM317L is available in a standard TO-92 transistor pack-

age, the SO-8 package, and 6-Bump micro SMD package.

The LM317L is rated for operation over a −25°C to 125°C

range.

Features

■

Adjustable output down to 1.2V

Guaranteed 100mA output current

Line regulation typically 0.01%V

Load regulation typically 0.1%

Current limit constant with temperature

Eliminates the need to stock many voltages

Standard 3-lead transistor package

80dB ripple rejection

Available in TO-92, SO-8, or 6-Bump micro SMD package

Output is short circuit protected

See AN-1112 for micro SMD considerations

8-Pin SOIC

Top View

906405

Related parts for LM317LM/NOPB

LM317LM/NOPB Summary of contents

Page 1

LM317L 3-Terminal Adjustable Regulator General Description The LM317L is an adjustable 3-terminal positive voltage reg- ulator capable of supplying 100mA over a 1.2V to 37V output range exceptionally easy to use and requires only two external resistors to ...

Page 2

SMD *NC = Not Internally connected. Top View (Bump Side Down) Ordering Information Package Part Number TO-92 LM317LZ 8-Pin SOIC LM317LM * LM317LIBP * LM317LIBPX 6-Bump micro SMD * LM317LITP * LM317LITPX Note: The micro SMD package marking ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input-Output Voltage Differential Operating Junction Temperature Range Electrical Characteristics Parameter Line Regulation T J Load Regulation T J Thermal Regulation T J Adjustment Pin Current ...

Page 4

Physical Dimensions inches (millimeters) unless otherwise noted SO-8 Molded Package NS Package Number M08A 15 ...

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