# Step-down regulator Texas Instruments LM2678 S-5.0, fixed 5 V output, input 8–40 V, TO-263 package

**URL:** https://aio.lv/en/product--texas-instruments-lm2678s-50nopb--12224458
**Data updated:** 2026-03-29 16:11 (EEST)
**Category:** Electronics Accessories
**Manufacturer:** texas instruments
**Manufacturer code:** LM2678S-5.0/NOPB
**EAN:** 2050009607616
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 22.49 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 18.59 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--texas-instruments-lm2678s-50nopb--12224458

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 27.07.2026 | free |
| Pickup points | 30.07.2026 | 1.89 EUR |
| Courier delivery to door | 30.07.2026 | 4.99 EUR |

## Summary description

The Texas Instruments LM2678 S-5.0 is a step-down (buck) switching regulator with a fixed 5 V output. Specified for input voltages from 8 to 40 V and supplied in a TO-263 (D2PAK) package, it provides regulated 5 V power for electronic circuits and systems. Typical applications include power supplies for industrial electronics, embedded systems, and automotive/industrial modules requiring a compact regulator with wide input range.

## Long description

The Texas Instruments LM2678 S-5.0 is a step-down switching regulator that provides a fixed 5 V output from input voltages between 8 V and 40 V. Supplied in a TO-263 (D2PAK) power package, this buck regulator is designed to deliver regulated 5 V power for a range of electronic circuits and systems where a compact, high-efficiency converter is required. The device integrates the control and switching elements needed for a synchronous single-switch step-down topology and is suitable for designs that demand stable 5 V rails from higher-voltage sources.
Advantages
The LM2678 S-5.0 offers a wide input voltage range and a fixed, accurate 5 V output, reducing external component complexity for common 5 V designs. Its TO-263 package provides thermal performance and board-mount convenience for surface-mount assembly. The switching regulator topology enables higher efficiency compared with linear regulators when stepping down from elevated input voltages, which helps lower power dissipation and thermal stress in compact designs.
Suitable for
 Industrial power supplies and control modules requiring a stable 5 V rail
 Embedded systems and microcontroller power domains powered from 12 V or 24 V sources
 Automotive and vehicle electronics where wide input voltage tolerance is needed
 Compact electronic modules and PCB-mounted power converters
Key specifications
 Output voltage: fixed 5 V
 Input voltage range: 8 V to 40 V
 Package type: TO-263 (D2PAK) surface-mount power package
 Topology: step-down (buck) switching regulator
 Intended use: regulated DC power supply for electronic circuits
How to use
Integrate the LM2678 S-5.0 into a PCB layout following recommended application guidelines for input decoupling, switching node layout, and thermal vias to ensure stable operation and heat dissipation. Provide appropriate input and output capacitors and an inductor chosen to match the regulator's switching frequency and required output current. Observe manufacturer recommendations for layout near the switching node to minimize EMI and ensure reliable regulation at the 5 V output.
Usage recommendations
For best results, follow the device datasheet for component selection (capacitors, inductor, diode if required), thermal management, and PCB layout. Verify the regulator's thermal performance in your application and, if needed, add heatsinking or increased copper area on the PCB. Confirm input filtering and transient response meet system requirements when powering sensitive electronics.

## FAQ

### How much does the Texas Instruments LM2678 S-5.0 step-down regulator cost, and is it available for purchase?

The price is 22.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 27.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All texas instruments products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized texas instruments service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

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