LM317KCSE3In StockTexas Instruments
LM317KCSE3 is an adjustable positive linear voltage regulator outputting 1.25V to 37V at up to 1.5A. It features a 40V max input, 2V typical dropout, and comes in a TO-220 3-pin package. From $0.49 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- LM317KCSE3 Datasheet PDF
- Category
- Diode
- Price
- From $0.4851(MOQ 10)
- Temp Range
- ?°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Adjustable output voltage from 1.25V to 37V suits diverse power supply designs
- 1.5A continuous output current with internal current limiting and thermal shutdown protection
- Low 2V typical dropout voltage maximizes efficiency in linear regulation applications
- Wide 3V to 40V input voltage range compatible with a broad range of power sources
- TO-220 through-hole package enables easy heat sinking for high-power applications
Applications
The LM317KCSE3 is widely used in adjustable bench power supplies, battery chargers, and post-regulator circuits where a stable, tunable DC voltage is required. It suits industrial control systems, audio equipment, and laboratory instruments that demand precise voltage regulation from 1.25V to 37V. Its robust TO-220 package and built-in protection features also make it ideal for automotive and telecom power conditioning applications.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Nom | 2V |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 3V |
| Input-Output Voltage Differential-Max | 40V |
| Input-Output Voltage Differential-Min | 3V |
| JESD-30 Code | R-PSFM-T3 |
| JESD-609 Code | e3 |
| Line Regulation-Max (%/V) | 0.07 |
| Load Regulation-Max(%) | 1.5% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Output Current1-Max | 1.5A |
| Output Voltage1-Max | 37V |
| Output Voltage1-Min | 1.25V |
| Output Voltage1-Nom | 37V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SIP3,.1TB |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Packing Method | TUBE |
| Qualification Status | Not Qualified |
| Regulator Type | ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Voltage Tolerance-Max | 5% |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM317KCSE3:
Frequently Asked Questions
What is the output voltage range of the LM317KCSE3?
The LM317KCSE3 provides an adjustable output voltage from 1.25V to 37V, set by two external resistors. This flexibility makes it suitable for a wide variety of DC power supply designs requiring precise, stable voltage regulation.
What is the maximum output current the LM317KCSE3 can supply?
The LM317KCSE3 can supply up to 1.5A of continuous output current. It includes built-in current limiting and thermal shutdown protection to prevent damage under overload or excessive temperature conditions.
What are typical applications for the LM317KCSE3?
Typical applications include adjustable bench power supplies, battery chargers, motor speed controllers, and voltage regulators in industrial control, audio, and telecom systems. Its 1.25V to 37V adjustable range and 1.5A current rating cover a broad spectrum of use cases.
What package does the LM317KCSE3 use and how should it be heat sinked?
The LM317KCSE3 uses a 3-pin TO-220 through-hole package (with tab). For high-power applications, attach the exposed metal tab to a suitable heat sink using thermal compound to keep the junction temperature within safe limits and maintain stable regulation.
Is the LM317KCSE3 RoHS compliant?
Yes, the LM317KCSE3 is lead-free and RoHS compliant, as indicated by its JESD-609 e3 code and Pbfree designation. It is suitable for use in environmentally sensitive and modern electronics manufacturing applications.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $0.7570 | $7.57 |
| 50+ | $0.6390 | $31.95 |
| 100+ | $0.6020 | $60.20 |
| 360+ | $0.5597 | $201.49 |
| 465+ | $0.5411 | $251.61 |
| 620+ | $0.4851 | $300.76 |
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