Home Power management Linear & low-dropout (LDO) regulators
Home
Power management
Linear & low-dropout (LDO) regulators

LM317L

ACTIVE

100-mA, 35-V, adjustable linear voltage regulator

Order now
Data sheet

LM317L

ACTIVE
Data sheet Order now

Product details

Output options Adjustable Output Iout (max) (A) 0.1 Vin (max) (V) 35 Vin (min) (V) 3.75 Vout (max) (V) 32 Vout (min) (V) 1.2 Rating Catalog Noise (µVrms) 30 PSRR at 100 KHz (dB) 38 Iq (typ) (mA) 1.5 Thermal resistance θJA (°C/W) 52 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 4 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) -40 to 125
Output options Adjustable Output Iout (max) (A) 0.1 Vin (max) (V) 35 Vin (min) (V) 3.75 Vout (max) (V) 32 Vout (min) (V) 1.2 Rating Catalog Noise (µVrms) 30 PSRR at 100 KHz (dB) 38 Iq (typ) (mA) 1.5 Thermal resistance θJA (°C/W) 52 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 4 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6 SOT-89 (PK) 3 18.4275 mm² 4.5 x 4.095 TO-92 (LP) 3 19.136 mm² 5.2 x 3.68 TSSOP (PW) 8 19.2 mm² 3 x 6.4
  • Output voltage range (VO):
    • Adjustable 1.25V to 37V (for new chip)
    • Adjustable 1.25V to 32V (for legacy chip)
  • Output current: Up to 100mA
  • Accuracy:
    • Input regulation typically 0.01% per input voltage change
    • Output regulation typically 0.5%
  • Ripple rejection typically:
    • 80 dB at 120Hz
    • 65 dB at 100kHz
  • For higher output current requirements, see LM317M (500mA) and LM317 (1.5A)
  • Output voltage range (VO):
    • Adjustable 1.25V to 37V (for new chip)
    • Adjustable 1.25V to 32V (for legacy chip)
  • Output current: Up to 100mA
  • Accuracy:
    • Input regulation typically 0.01% per input voltage change
    • Output regulation typically 0.5%
  • Ripple rejection typically:
    • 80 dB at 120Hz
    • 65 dB at 100kHz
  • For higher output current requirements, see LM317M (500mA) and LM317 (1.5A)

The LM317L is an adjustable, 3-terminal, positive-voltage regulator capable of supplying up to 100 mA over an output-voltage range of 1.25V to 37V. The device is exceptionally easy to use and requires only two external resistors to set the output voltage.

For the legacy chip, the LM317LC series is characterized for the junction temperature range of 0°C to +125°C and the LM317LI device is characterized for the operating junction temperature range of –40°C to +125°C. For the new chip, the both LM317LC and LM317LI series are characterized for the junction temperature range of –40°C to +125°C.

The LM317L is an adjustable, 3-terminal, positive-voltage regulator capable of supplying up to 100 mA over an output-voltage range of 1.25V to 37V. The device is exceptionally easy to use and requires only two external resistors to set the output voltage.

For the legacy chip, the LM317LC series is characterized for the junction temperature range of 0°C to +125°C and the LM317LI device is characterized for the operating junction temperature range of –40°C to +125°C. For the new chip, the both LM317LC and LM317LI series are characterized for the junction temperature range of –40°C to +125°C.
filter Find other Linear & low-dropout (LDO) regulators
Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 20
Type Title Date
* Data sheet LM317L 100mA Adjustable Floating Voltage Regulator datasheet (Rev. F) PDF | HTML 19 Dec 2024
Application note Cost-Optimized, High-Performance Front-End Design for Analog Input Modules PDF | HTML 22 Jun 2022
Application note LDO Noise Demystified (Rev. B) PDF | HTML 18 Aug 2020
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
Application note LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 09 Aug 2017
Application note AB-12 Wide Adjustable Range PNP Voltage Regulator (Rev. B) 06 May 2013
Application note AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) 06 May 2013
Application note AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) 06 May 2013
Application note AN-42 IC Provides On-Card Regulation for Logic Circuits (Rev. B) 06 May 2013
Application note AN-178 Applications for an Adjustable IC Power Regulator (Rev. B) 05 May 2013
Application note AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B) 05 May 2013
Application note Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) 05 May 2013
Application note AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) 23 Apr 2013
Application note High-Efficiency Reg has Low Drop-Out Voltage (Rev. B) 23 Apr 2013
Application note Packaging Limits Range of Linear Regulators 08 May 2010
Application note Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) 04 Jun 2008
Application note A New Production Technique for Trimming Voltage Regulators 03 Oct 2002
Application note Adjustable 3-Terminal Regulator for Low-Cost Battery Charging Systems 03 Oct 2002
Application note High Stability Regulators 03 Oct 2002
Application note Understanding the Terms and Definitions of LDO Voltage Regulators 21 Oct 1999

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

LM317L PSpice Transient Model

SNVMAW4.ZIP (65 KB) - PSpice Model
Download
Simulation model

LM317L Unencrypted PSpice Transient Model

SNVMAW3.ZIP (2 KB) - PSpice Model
Download
Reference designs

PMP15043 — 6A, 0.05% Current Accuracy Power Solution for Battery Test Systems Reference Design

This reference design circuit introduces a highly accurate, bi-directional current power solution used in battery test systems (BTS). The maximum current capability is 6A with lower than 0.05% full scale accuracy. Controlling through a logic pin, the circuit can be used to charge or discharge a (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDA-00210 — 75V/10A Protected Full-Bridge Power Stage Reference Design for Bipolar Stepper Drives

Stepper drives are used in many applications operating typically from 12VDC to 48VDC. TI offers a rich family of stepper motor driver solutions with industry standard step/direction and parallel control interfaces.

For applications which require higher torque and power, often voltages above 48VDC, (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00365 — 75V/10A Protected Full-Bridge Power Stage Reference Design for Brushed DC Drives

Low voltage brushed DC drives are used in many applications. TI offers a rich family of brushed DC motor driver solutions with flexible control interface options for one or more brushed DC motors up to 60V.  For applications which require higher torque and power, often voltages above 60VDC (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP8955 — Programmable output Constant Voltage - Constant Current (CVCC) Quasi-Resonant Flyback charger

This industrial charger reference design uses the LM5023 Quasi-Resonant Flyback controller to implement a 120VAC input design with CVCC output configured by microcontroller PWM control from 10 to 22.5V and output current from 200mA to 2A.
Test report: PDF
Schematic: PDF
Reference designs

PMP7246 — 36-60Vin, 350W Slow Drain Modulation Power Converter with PSFB ZTE and HSHB Reference Design

This is a 350W High Speed Full Bridge Phase Shift ZVT Synchronous Rectification DC/DC reference design. It is built for telecom applications to supply a RF Power Amplifier stage. The design is utilizing UCC28950 voltage mode forward and average current limitation backward converter (two quadrant (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
SOT-89 (PK) 3 Ultra Librarian
TO-92 (LP) 3 Ultra Librarian
TSSOP (PW) 8 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos