XBLW LM2576S-5

Mfr. Part

LM2576S-5

Manufacturer

XBLW

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Detailed Description

Fixed 5 V, 3 A step-down (buck) switching regulator in TO-263 (D2PAK). Typical 52 kHz switching frequency. Integrates the power switch and control circuitry. Requires only a few externals: inductor, Schottky diode, input/output capacitors. Designed to convert higher DC input voltage down to a stable 5 V rail with good efficiency. Suitable for wide input range applications where simple, rugged 5 V power is needed

Key Features

Fixed 5 V output, up to 3 A load current

Wide input voltage range (commonly used around 7 V to 40 V for 5 V output)

52 kHz nominal switching frequency

Internal power MOSFET, current limiting, and thermal shutdown

Low external parts count (inductor, diode, two capacitors)

ON/OFF (enable) pin for simple power control

Stable with standard electrolytic capacitors

Proven LM2576 family pinout and layout conventions

Key Advantages

Simple to design and debug; great for fast, reliable 5 V supplies

High efficiency vs. linear regulators; less heat at 3 A loads

Robust protections (overcurrent and overtemperature)

Common, well-understood topology with abundant design resources

Drop-in family footprint makes sourcing and substitutions easier

Cost-effective solution for 12 V to 5 V conversion and similar rails

Packaging

Type: TO-263 (D2PAK), surface-mount

Package / Case code: 1353 (commonly aligns with TO-263-5)

Material: Molded epoxy over a copper leadframe; tin-plated leads

Size: TO-263 D2PAK footprint, low-profile package suitable for heat spreading on PCB copper (exact dimensions vary by manufacturer; follow the TO-263 land pattern)

Pin configuration (5 leads + thermal tab):

1. VIN

2. Output

3. GND

4. Feedback

5. ON/OFF (Enable)

Thermal tab: connected to ground; use large copper area for heat dissipation

Thermal characteristics (typical for TO-263 with adequate copper):

- Low junction-to-case thermal resistance; improved by soldered thermal pad

- Overall thermal performance strongly depends on PCB copper area and airflow

Electrical properties (package-related):

- High-current leadframe suitable for several amperes

- Solderable, SMT package with robust mechanical strength when reflowed to large copper pads

Lifecycle

Status: Mature, widely used buck regulator family; not generally considered near end-of-life in the industry

Availability: Lifecycle may vary by manufacturer; XBLW supply is supported by Y-IC

Common equivalents and alternates used in industry (verify pinout and characteristics for your design):

- TI/National Semiconductor LM2576S-5.0 (same family, fixed 5 V)

- Unisonic UTC LM2576S-5.0 (family equivalent)

- XL Semi XL2576-5.0 (family equivalent)

- AMS AMS2576-5.0 (family equivalent)

- KEC KIA2576-5.0 (family equivalent)

- TI LM2596S-5.0 (higher switching frequency, often pin-compatible; check passives and layout)

- Microchip MIC4576-5.0 (higher frequency alternative; check design details)

If you need strict pin-for-pin, performance, or regulatory matches, or if your application has special requirements, please contact our sales team via our website for detailed cross-reference support

Key Application Areas

12 V to 5 V conversion in automotive, industrial, and telecom systems

24 V or 19 V sources down to 5 V for control logic, MCUs, and sensors

Embedded systems, single-board computers, gateways, and routers

Security cameras, DVR/NVR boards, access control and intercom systems

Pre-regulator ahead of low-noise LDOs to reduce heat and improve overall efficiency

General-purpose 5 V rails in instrumentation, test equipment, and prototyping

Power modules and DIY power boards using the LM2576 topology

Datasheet

Our website hosts the most authoritative datasheet for this product model. For the best and latest technical details, recommended external component values, layout guidelines, and thermal design tips, download the datasheet on this page

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