# DC/DC Boost/Forward/Flyback Switching Regulator Texas Instruments LM2577SX-ADJ/NOPB, TO-263-5, Adjustable Output

**URL:** https://aio.lv/en/product--texas-instruments-lm2577sx-adjnopb--1775947
**Data updated:** 2026-03-27 13:13 (EET)
**Category:** Electronics Accessories
**Manufacturer:** texas instruments
**Manufacturer code:** LM2577SX-ADJ/NOPB
**EAN:** 2050002134195
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 20.99 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 17.35 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--texas-instruments-lm2577sx-adjnopb--1775947

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 28.07.2026 | free |
| Pickup points | 31.07.2026 | 1.89 EUR |
| Courier delivery to door | 31.07.2026 | 4.99 EUR |

## Summary description

Adjustable DC/DC switching regulator Texas Instruments LM2577SX-ADJ/NOPB in TO-263-5 package. Designed for boost, flyback and forward converter topologies, the LM2577SX-ADJ provides an adjustable output using external components for voltage regulation. Typical use cases include power supplies, battery-powered systems and embedded electronics requiring step-up or isolated converter functions. Use with appropriate inductors, diodes and feedback network per datasheet.

## Long description

The Texas Instruments LM2577SX-ADJ/NOPB is an adjustable DC/DC switching regulator in a TO-263-5 package designed for boost, forward and flyback converter topologies. The device provides an adjustable output voltage through an external feedback network and requires external components such as an inductor and diode to form a complete power conversion stage. Typical applications include power supplies, battery-powered systems and embedded electronics where step-up or isolated converter functions are needed. The regulator's physical package and pinout support through-hole or PCB-mounted power designs with thermal considerations in mind.
Advantages
The LM2577SX-ADJ offers a flexible adjustable output that can be configured for a wide range of voltages using external resistors. Its support for boost, forward and flyback topologies makes it suitable for both non-isolated and isolated power conversion designs. The TO-263-5 package provides a compact footprint with thermal dissipation paths appropriate for moderate power levels when used with recommended board layout and heat sinking. The part operates as a switching regulator, providing higher efficiency than linear regulators in step-up and isolated converter applications.
Suitable for
 Boost converters for stepping up battery voltages
 Flyback and forward converters in isolated or non-isolated supplies
 Embedded electronics and microcontroller power rails requiring higher voltages
 Battery-powered devices needing efficient DC/DC step-up stages
Key specifications
 Function: Adjustable DC/DC switching regulator supporting boost, forward and flyback topologies
 Package: TO-263-5 (surface-mount power package)
 Output: Adjustable via external feedback network (user-defined output voltage)
 External components required: inductor, rectifying diode and output capacitor per design topology
 Thermal: heat dissipation requires appropriate PCB copper area and/or heat sinking for moderate power operation
How to use
Design the converter by selecting the appropriate topology (boost, forward or flyback) and consult the manufacturer's recommended circuit for component selection and layout. Choose an inductor and diode with current and voltage ratings appropriate for the target output and input conditions. Set the output voltage with a resistor divider connected to the feedback pin, following the device's recommended feedback resistor values and compensation network. Implement proper input and output capacitors to minimize switching noise and ensure stable regulation. Observe thermal management practices such as using adequate PCB copper area and, if necessary, a heatsink attached to the package.
Usage recommendations
Follow the Texas Instruments datasheet and application notes for recommended component values, layout guidelines and thermal calculations. Verify stability and transient response in prototype builds, and ensure component voltage and current ratings include safety margins for expected operating conditions.

## FAQ

### How much does the Texas Instruments LM2577SX-ADJ/NOPB DC/DC Switching Regulator cost, and is it available for purchase?

The price is 20.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 28.07.2026 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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