LM2596 Dual USB 3A DC-DC Buck Converter – 6V–40V to 5V Step-Down Module

LM2596 Dual USB 3A Buck Converter Step-Down Module – 5V DC Output

Buy the LM2596 Dual USB 3A Buck Converter Step-Down Module online in Pakistan from Robostan.pk. This compact DC-DC power converter transforms a higher DC input voltage into a regulated 5V output through two convenient USB-A ports.

Designed for DIY USB power supplies, vehicle electronics, Arduino projects, mobile device charging, and embedded systems, the LM2596 Dual USB Converter accepts a commonly specified 6V to 40V DC input and delivers a fixed 5V output with up to 3A maximum combined current under suitable operating conditions.

With an efficient switching regulator design, dual USB connections, and simple input wiring, this module is a practical solution for powering compatible 5V USB devices from 12V or 24V DC power sources.

Key Features

• LM2596 DC-DC step-down buck converter module
• Two USB Type-A output ports
• Fixed regulated 5V DC output
• Typical advertised input voltage: 6V to 40V DC
• Maximum combined USB output current: 3A
• Based on LM2596 switching regulator technology
• 150kHz switching frequency
• Advertised conversion efficiency up to 92%
• Suitable for 12V and 24V DC power systems
• Compatible with suitable USB-powered electronics
• Convenient input connections on common board versions
• Compact PCB for custom power supply projects
• Useful for Arduino, robotics and embedded electronics
• Suitable for DIY vehicle USB power adapters

Technical Specifications

Applications

• DIY 12V to 5V USB power supplies
• Vehicle USB charging projects
• 24V to 5V DC conversion
• Mobile phone charging from suitable DC sources
• USB-powered Arduino projects
• ESP32 and microcontroller power supply projects
• Portable electronics power distribution
• Battery-powered USB accessories
• Solar-powered USB supply experiments
• Custom electronics enclosures
• Robotics and automation power supplies
• Educational DC-DC converter experiments

How Does the LM2596 Dual USB Converter Work?

The LM2596 Dual USB Step-Down Module uses a switching regulator to reduce a higher DC input voltage to a lower regulated output voltage.

The LM2596 switches current through an inductor and associated power components to regulate the output efficiently.

On the standard dual-USB board, the output is fixed at approximately 5V and connected to both USB-A sockets.

This allows suitable USB devices to receive 5V power from a 12V, 24V, or other compatible DC input source.

Important: This module reduces voltage only. It cannot increase a voltage below the level required to maintain its 5V output.

Dual USB 5V Output

The module includes two USB-A output ports, allowing compatible USB-powered devices to be connected simultaneously.

The published 3A output capability refers to the combined maximum current across both USB ports.

It does not mean that each port can independently deliver 3A at the same time.

The actual available current depends on the module's regulator, PCB layout, input source, cooling and operating temperature.

12V to 5V USB Power Supply

The LM2596 Dual USB Buck Converter is useful for generating a 5V supply from a suitable 12V DC source.

For example, it can be integrated into custom vehicle electronic projects where a 12V battery powers USB accessories.

The module can also be used with appropriate regulated DC adapters and battery systems.

For automotive installations, suitable external protection against voltage spikes, reverse polarity and electrical noise should be provided.

24V to 5V DC Converter

The module can also reduce a compatible 24V DC input to a regulated 5V output.

This makes it suitable for appropriate low-power electronics and USB supply applications where a 24V source is available.

At higher input voltages and output currents, converter temperature and power dissipation should be monitored carefully.

LM2596 Dual USB Wiring

The standard module includes positive and negative DC input connections.

• IN+: Positive DC input
• IN-: Negative DC input / Ground
• USB Port 1: Fixed 5V output
• USB Port 2: Fixed 5V output

Connect a suitable DC source to the marked input terminals, observing correct polarity.

Before connecting USB devices, measure the output voltage to confirm that the module is delivering approximately 5V.

LM2596 Dual USB vs LM2596 Adjustable Buck Converter

Both products use LM2596-family step-down regulator technology, but their board configurations differ.

• LM2596 Dual USB Module: Designed to provide a fixed 5V output through two USB-A ports.
• LM2596 Adjustable Buck Converter: Usually provides an adjustable output voltage through screw terminals or solder pads.

Choose the dual-USB version for convenient 5V USB-powered projects. Select the adjustable version when your circuit requires another suitable regulated voltage.

LM2596 Dual USB vs Quick Charging Modules

The standard LM2596 Dual USB Converter supplies regulated 5V power.

It should not be confused with USB Power Delivery (PD), Qualcomm Quick Charge (QC), or other fast-charging negotiation modules.

Supported charging current and device compatibility depend on the connected device and the USB port identification circuitry implemented on the specific board.

Advantages of the LM2596 Dual USB Module

Two USB Outputs: Convenient connection of compatible USB-powered devices.

Wide DC Input Range: Suitable for many 12V and 24V power supply projects.

Switching Regulation: More efficient than many simple linear regulator designs under suitable conditions.

Fixed 5V Output: Convenient for projects requiring standard USB power.

Compact Design: Easy to incorporate into DIY electronics and power conversion projects.

Important Safety and Usage Notes

• Use only DC power within the limits specified for your actual module.
• Observe correct input polarity to avoid permanent damage.
• Do not connect directly to AC mains.
• The 3A rating is a maximum shared output, not a guaranteed continuous current from each port.
• Check regulator temperature under load and provide adequate ventilation.
• Do not exceed the thermal or current limits of the converter.
• Maintain suitable input voltage margin above the regulated 5V output.
• The manufacturer's 40V input figure may be close to the regulator's maximum rating; avoid input voltage spikes.
• Measure the USB output before connecting expensive electronic devices.
• The module is not a USB-C PD charger or a guaranteed QC fast charger.
• It does not include the complete charging-management circuitry required to charge bare lithium-ion cells safely.
• Use a suitably protected power supply for automotive applications.
• The converter is non-isolated and does not provide galvanic isolation.
• Board layout and dimensions may vary between manufacturers.

Package Contents

• 1 x LM2596 Dual USB 3A DC-DC Buck Converter Module

Buy LM2596 Dual USB Converter in Pakistan

Looking for an LM2596 Dual USB 3A Buck Converter in Pakistan? Shop online at Robostan.pk for USB power modules, DC-DC converters, LM2596 voltage regulators, Arduino accessories, battery electronics and robotics components.

This dual-USB module is useful for students, engineers, technicians and electronics enthusiasts developing compact low-voltage DC power supply projects.

Order your LM2596 Dual USB Step-Down Converter from Robostan.pk with nationwide delivery across Pakistan, including Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Peshawar and other cities.

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