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The LM2596S-5.0/NOPB is a classic, efficient, 3A step-down (buck) DC-DC switching regulator from the SIMPLE SWITCHER® series by Texas Instruments. This device efficiently converts a higher DC input voltage (up to 40V) to a fixed 5.0V DC output voltage, delivering a continuous load current of up to 3A. It integrates frequency compensation and a fixed-frequency oscillator (150kHz) internally, resulting in a minimal external component count and greatly simplifying the design of efficient switching power supplies. It is an ideal replacement for traditional linear regulators to reduce power consumption and heat dissipation, widely used in power systems across various electronic devices.
Category:Integrated Circuits (ICs);Power Management (PMIC);Voltage Regulators - DC DC Switching Regulators
Mfr:Texas Instruments
Series:SIMPLE SWITCHER®
Packaging:Tube
Part Status:Active
Function:Step-Down
Output Configuration:Positive
Voltage - Input (Min):4.5V
Voltage - Input (Max):40V
Current - Output:3A
Frequency - Switching:150kHz
Operating Temperature:-40°C ~ 125°C (TJ)
Mounting Type:Surface Mount
Package / Case:TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Supplier Device Package:TO-263 (DDPAK-5)
Base Product Number:LM2596
Efficient Step-Down Conversion: Utilizes switching-mode voltage conversion, offering significantly higher efficiency than linear regulators (especially with large voltage differentials), effectively reducing power loss and heat generation.
Wide Input Voltage & High Output Current: Supports a wide 4.5V to 40V input range, compatible with environments like automotive and industrial where voltage fluctuations exist. The 3A output current capability can power most onboard digital circuits and some motor loads.
Fixed Frequency & Simple Design: Integrates a 150kHz fixed-frequency oscillator and frequency compensation internally, minimizing external components (typically only an inductor, capacitors, and a diode). This simplifies design, reducing development effort and BOM cost.
Excellent Thermal Performance & Protection: Housed in a TO-263 (D2PAK) package with an exposed metal heatsink tab, facilitating heat transfer from the die to the PCB copper pour for enhanced thermal dissipation. It also integrates thermal shutdown and current limit protection, improving system reliability.
SIMPLE SWITCHER Series Advantage: As part of this series, it benefits from TI's comprehensive design support, including simulation models, design calculation tools, and reference schematics, speeding time to market.
Industrial & Automation Control Systems: Powering 5V digital logic circuits in PLCs, industrial PCs, sensors, and controllers.
Automotive Electronics: Converting vehicle battery voltage (12V/24V) to 5V for infotainment systems, dashboards, dash cams, etc.
Communications Equipment: Providing 5V core power for MCUs, FPGAs, and interface chips in routers, switches, and base station modules.
Consumer Electronics: Smart home devices, audio amplifiers, LCD backlight drivers, etc.
Test & Measurement Instruments: Serving as an auxiliary 5V supply for various functional modules within instruments.
General-Purpose Power Modules: Forming standalone DC-DC buck modules for project prototyping or as off-the-shelf power solutions.
The LM2596S-5.0/NOPB is a time-tested, well-engineered 3A step-down switching regulator. Centered around the SIMPLE SWITCHER design philosophy, it achieves an excellent balance among high conversion efficiency, wide input voltage adaptability, and robust 3A drive capability. Its minimal external circuitry and robust TO-263 package enable engineers to implement efficient power designs quickly and reliably, particularly suitable for converting industrial supplies or batteries to standard 5V logic voltages. For designers seeking a high-performance, reliable, and easy-to-implement 5V/3A power solution, the LM2596S-5.0/NOPB remains a classic and trusted choice.
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