TI LM317AH
Adjustable positive linear voltage regulator in TO-39-3 package, capable of supplying up to 1.5A of current





Brands: Texas Instruments
Mfr.Part #: LM317AH
Datasheet: LM317AH Datasheet (PDF)
Package/Case: TO-3
Product Type: Voltage Regulators , Linear, Low Drop Out Regulators
RoHS Status:
Stock Condition: 5,972 pcs, New Original
Warranty: 1 Year Ovaga Warranty - Find Out More
0
1
LM317AH General Description
One of the key features of the LM317AH is its adjustable output voltage, which can be set anywhere between 1.25 volts and 37 volts. This level of precision makes it an ideal choice for applications where precise and stable voltage control is essential. Additionally, the IC is designed to operate reliably in temperatures ranging from -40°C to 125°C, ensuring its suitability for use in diverse environmental conditions
Features
- Robust output short-circuit protection
- No minimum load requirement
- Excellent temperature stability
- Suitable for automotive and industrial applications
- Fully protected against overcurrent
- Precise voltage regulation guaranteed
Application
Adjustable Power Supplies
System Power Supplies
Precision Voltage / Current Regulators
Specifications
Parameter | Value | Parameter | Value |
---|---|---|---|
Output options | Adjustable Output | Maximum Continuous Drain Current (A) | 1.5 |
Vin (max) (V) | 40 | Vin (min) (V) | 3 |
Vout (max) (V) | 37 | Vout (min) (V) | 1.2 |
Noise (µVrms) | 38 | Iq (typ) (mA) | 5 |
Thermal resistance θJA (°C/W) | 24 | Rating | Catalog, Military |
Load capacitance (min) (µF) | 0 | Regulated outputs (#) | 1 |
Accuracy (%) | 5 | PSRR at 100 KHz (dB) | 40 |
Dropout voltage (Vdo) (typ) (mV) | 2250 | Operating temperature range (°C) | -40 to 125 |
Base Product Number | LM317 |
Shipping
Shipping Type | Ship Fee | Lead Time | |
---|---|---|---|
![]() |
DHL | $20.00-$40.00 (0.50 KG) | 2-5 days |
![]() |
Fedex | $20.00-$40.00 (0.50 KG) | 2-5 days |
![]() |
UPS | $20.00-$40.00 (0.50 KG) | 2-5 days |
![]() |
TNT | $20.00-$40.00 (0.50 KG) | 2-5 days |
![]() |
EMS | $20.00-$40.00 (0.50 KG) | 2-5 days |
![]() |
REGISTERED AIR MAIL | $20.00-$40.00 (0.50 KG) | 2-5 days |
Processing Time:Shipping fee depend on different zone and country.
Payment
Terms of payment | Hand Fee | |
---|---|---|
![]() |
Wire Transfer | charge US$30.00 banking fee. |
![]() |
Paypal | charge 4.5% service fee. |
![]() |
Credit Card | charge 3.5% service fee. |
![]() |
Western Union | charge US.00 banking fee. |
![]() |
Money Gram | charge US$0.00 banking fee. |
Guarantees
1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
Packing
-
Step1 :Product Inventory
-
Step2 :Pressure Relief Packaging
-
Step3 :Anti Static Packaging
-
Step4 :Protective Packaging
-
Step5 :Sealed Packaging
-
Step6 :Preparation for shipment
We will inspect and count all goods before shipping to ensure that all products are intact and in accurate quantity, and will fully package them to ensure that they will not be damaged during transportation.
Q: How can I order the LM317AH?
A: To place an order for the LM317AH, select the "Add to Cart" button associated with the product listing on our website. Once selected, you can finalize your purchase by proceeding to the checkout page, where you can enter your payment and shipping information.
Q: What is the warranty period for the LM317AH?
A: We offer a 1-year warranty on the LM317AH. This warranty covers any defects in materials and artistry under normal use. During the warranty period, if the product is found to be defective, it will be repaired or replaced at no charge. For further details, please refer to our warranty policy.
Q: How does Ovaga ensure the authenticity of LM317AH from Texas Instruments?
A: Ovaga has a dedicated business development team that rigorously tests and verifies the credentials of original Texas Instruments manufacturers and authorized agents. All Texas Instruments suppliers must pass a qualification review before they can list their LM317AH products on our platform. We emphasize sourcing from reliable channels and maintaining high product quality standards, ensuring you can make your purchase with confidence.
Q: How can I find detailed information about the LM317AH chips, such as application notes, factory information, and images?
A: You can utilize Ovaga's intelligent search engine, filter by the Ethernet PHY Products category, or visit the Texas Instruments information page to find comprehensive details about the LM317AH.
Q: Are the price and stock information for LM317AH on Ovaga's platform accurate?
A: Inventory levels for Texas Instruments products can fluctuate and may not be updated in real time. The information is refreshed periodically within 24 hours. To confirm stock availability and final pricing, you must confirm your order with an Ovaga salesperson or customer service representative before proceeding with payment.
Q: Can I place orders offline with Ovaga?
A: Yes, offline orders are accepted. You can navigate to the "My Orders" section and enter transaction management to place your order. Reviewing the "Order Details" and proceeding to place the order is straightforward. Additionally, you may benefit from coupons or selected gifts when ordering online.
Q: What payment methods are accepted by Ovaga?
A: Ovaga accepts various payment methods, including Wire Transfer, PayPal, Credit Cards, Western Union, and Money Gram.
Q: How is shipping arranged, and how can I track my package?
A: Customers can choose from industry-leading freight companies such as DHL, FedEx, UPS, TNT, EMS, and Registered Air Mail. Once your order is processed for shipment, you will receive an email with the shipping status and tracking number. Note that tracking information may take up to 24 hours to be displayed by carriers. Typically, express delivery takes 2-5 days.
Q: What is the return or replacement process for LM317AH?
A: Ovaga conducts Pre-Shipment Inspections (PSI) on all orders to ensure quality before shipment. Suppose there are issues such as quantity discrepancies, incorrect items, or visible defects (e.g., breakage or rust), and they are acknowledged by us. In that case, returns or replacements will be accepted under the following conditions:
- ●The defect must be reported within 365 days after delivery.
- ●The product must be unused and in its original, unopened packaging.
- ●Requesting Return Authorizations must be obtained.
For the return process:
- ●Please inform us within 365 days of receiving the product.
- ●Obtain Return Authorization from our team.
- ●Please refer to our After-Sale Matters for more detailed instructions.
Q: How can I contact Ovaga for support, including obtaining datasheets or pin diagrams for the LM317AH?
A: For any after-sales support or technical inquiries, including requests for datasheets or pin diagrams, please get in touch with us via email at [email protected].
Q: What can you tell me about Ovaga's quality assurance practices?
A: Ovaga is committed to maintaining the highest standards of quality. We are certified under ISO14001, ISO 9001, IATF16949, ISO13485, and DUNS standards by the Quality Systems Registrar. This certification signifies that our operational systems meet stringent international standards in quality management. Our compliance is regularly reviewed and tested to ensure ongoing adherence to these standards, affirming our commitment to quality and continuous improvement.
Q: What do the ISO, IATF, and DUNS certifications mean for customers of Ovaga?
A: Our ISO, IATF, and DUNS certifications assure customers that Ovaga operates systems that are both accurate and comprehensive, meeting the rigorous requirements of the ISO, IATF, and DUNS standards. This certification underscores our long-term commitment to continuous improvement across our operations. As a note to our customers, while we strive for accuracy in product data on our website, we recommend referring to the manufacturer's datasheet or catalog for confirmed product specifications before placing an order. If you identify any discrepancies, please get in touch with us immediately.
Part points
-
The LM317AH is an adjustable voltage regulator designed by Texas Instruments. It features a TO-39-3 package and offers precise regulation, high reliability, and a wide operating temperature range. Common applications for the LM317AH include power supplies, battery chargers, LED drivers, precision measurement equipment, audio amplifiers, and industrial control systems. To use the LM317AH effectively, you'll need to select appropriate input and output resistors based on your specific design requirements.
-
Equivalent
The LM317AH is a popular linear regulator. Equivalent products include LM2940, LM350, and LM358, all serving similar voltage regulation needs. -
Features
The LM317AH features a compact and low-power TO-39 package. Key highlights include:
Superior thermal stability.
No output capacitor required.
Robust design for harsh environments.
Adjustable voltage regulator for wide applications (power supplies, chargers, LED drivers).
Protection against overload and short-circuits.
Precise voltage regulation for accurate device operation. These features make the LM317AH a versatile and reliable choice for various electronic circuits. -
Pinout
The LM317AH is a linear voltage regulator with an integrated adjustable output feature. It has a TO-39-3 package. Regarding the pin count, there are typically three pins:
**Vin** (Input) - Connects to the input power source.
**Adj** (Adjustment) - A trimmer capacitor or potentiometer is connected between Adj and GND (Ground). This controls the output voltage.
**GND** (Ground) - Common ground for both input and output. Please note that some LM317 variants may have additional pins for features like thermal shutdown or current sensing. Always refer to the datasheet for specific pinout details. -
Manufacturer
The LM317AH is manufactured by Texas Instruments (TI), a global semiconductor company. TI specializes in designing and producing integrated circuits for various industries, including telecommunications, automotive, and consumer electronics. With a focus on innovation and reliability, Texas Instruments is well-regarded in the tech world. -
Application Field
The LM317AH adjustable voltage regulator is widely used in power supplies, battery chargers, LED drivers, precision measurement equipment, audio amplifiers, and industrial control systems. Its versatility and compact design make it a popular choice in various electronic applications. -
Package
The LM317AH has a TO-39-3 package type.
Assembly Advice
No need to assemble boards by yourself anymore—Ovaga is here to help! We offer free assembly services for parts like LM317AH. Simply sign in to Ovaga and take advantage of discounts and free assembly options. Let us handle the work while you focus on your projects!
Learn more about our PCB services-
Pre-order the parts you need through Ovaga’s platform.
-
Once your parts are pre-ordered, simply place a PCBA order with us, and we’ll take care of the assembly for you.
-
Ovaga will produce and assemble your boards efficiently, with a quick turnaround of just 3 days!
PCB & SMT
PCB Assembly and Production Services
Professional Model >>Circuit Assembly Showcase

We provide high quality products, thoughtful service and after sale guarantee
-
We have rich products, can meet your various needs.
-
Minimum order quantity starts from 1pcs.
-
Lowest international shipping fee starts from $0.00
-
365 days quality guarantee for all products
Recommend
Assemble PCBs
One-Stop PCB & PCBA Services From design to production, delivered fast and cost-effectively. Certified quality:lATF16949,1S013485 IS09001.1S014001.
Fulfillment: Turnkey or consigned
Quantity: 1-10,000+pcs.
Quality Grade: IPC3
Lead time: as short as 2 days
Other: AOI. X-ray SPI, ICT