LM2577 LM2596 Dual-Chip DC-DC Buck-Boost Converter – Adjustable Step Up & Down Module

LM2577 LM2596 Dual-Chip DC-DC Buck-Boost Converter Module

Buy the LM2577 LM2596 Dual-Chip Buck-Boost Converter online in Pakistan from Robostan.pk. This adjustable DC-DC voltage converter combines two switching regulator ICs to provide both step-up (boost) and step-down (buck) voltage conversion in a single module.

The LM2577S + LM2596S Buck-Boost Converter is suitable for electronics projects requiring an adjustable DC output from a power source whose voltage may be higher or lower than the desired output.

Featuring a typical 3.5V to 28V DC input range, 1.25V to 26V adjustable output, and an onboard voltage adjustment potentiometer, this converter is useful for Arduino projects, robotics, portable electronics, battery-powered devices, and laboratory power supply experiments.

Key Features

• Dual-chip DC-DC step-up and step-down converter
• Combines LM2577S boost and LM2596S buck regulators
• Supports voltage conversion above or below the input voltage
• Typical input voltage range: 3.5V to 28V DC
• Adjustable output voltage: 1.25V to 26V DC
• Rated input and output current: 1A under appropriate conditions
• Onboard multi-turn voltage adjustment potentiometer
• Switching regulator design
• Convenient screw terminal connections
• Power indicator LED on common versions
• Two inductors and onboard filtering capacitors
• Compact PCB with mounting points
• Suitable for regulated DC power supply projects
• Useful for battery and solar-powered electronics
• Ideal for electronics testing and prototyping

Technical Specifications

• Product Name: LM2577 LM2596 Dual-Chip Buck-Boost Converter
• Converter Type: DC-DC Step-Up / Step-Down Voltage Regulator
• Boost Regulator IC: LM2577S
• Buck Regulator IC: LM2596S
• Input Voltage: 3.5V to 28V DC
• Adjustable Output Voltage: 1.25V to 26V DC
• Rated Input Current: 1A
• Rated Output Current: 1A, subject to input voltage, output voltage, power and thermal limitations
• Current Capability: Some versions advertise up to 3A maximum; this is not a guaranteed continuous rating
• Voltage Adjustment: Multi-Turn Potentiometer
• Input Connections: IN+ and IN-
• Output Connections: OUT+ and OUT-
• Typical Board Size: Approximately 53 x 38 x 21mm
• Power Indicator: LED on Common Versions
• Output Type: Adjustable DC Voltage
• Isolation: Non-Isolated
• Mounting: PCB Module with Mounting Holes

Applications

• Arduino and ESP32 power supply projects
• Robotics and embedded electronics
• Adjustable DC power supply circuits
• Battery-powered electronic equipment
• Portable power supply experiments
• Solar panel voltage regulation projects
• Electronic circuit prototyping
• DC voltage conversion experiments
• Low-power LED electronics with appropriate current control
• Voltage regulation for sensors and microcontrollers
• DIY electronics testing equipment
• Educational power electronics projects

How Does the LM2577 LM2596 Converter Work?

This module combines two switching voltage regulators:

• LM2577S Boost Regulator: Increases a DC voltage through a step-up switching converter circuit.
• LM2596S Buck Regulator: Reduces the intermediate voltage to the output level selected using the onboard potentiometer.

The combination allows the module to provide an adjustable output even when the input voltage is above or below the desired output voltage, provided that the actual operating conditions remain within the converter's limits.

For example, a user can configure the module to provide a suitable regulated voltage from a DC source whose voltage changes during operation.

Note: Maximum available output current depends on input voltage, output voltage, conversion losses, component ratings and cooling. Higher output voltages do not imply that the module can deliver its rated current under all conditions.

Adjustable Output Voltage

The LM2577 LM2596 DC-DC Converter includes an onboard potentiometer for setting the output voltage.

To configure the module:

1. Connect a compatible DC supply to the input terminals.
2. Measure the output voltage using a digital multimeter.
3. Carefully adjust the onboard potentiometer.
4. Set the output to the required voltage.
5. Verify the voltage before connecting the electronic load.

Important: Never connect a sensitive device before checking the converter's output voltage. The module may arrive with its output set above the safe operating voltage of your equipment.

LM2577 LM2596 Wiring Connections

Connect the input supply to IN+ and IN-. Connect the load to OUT+ and OUT- after setting and verifying the required output voltage.

The input and output are not electrically isolated. This module must not be used where galvanic isolation is required.

Buck-Boost Converter for Battery Projects

Battery voltage can change during discharge. A buck-boost converter can help provide a selected output voltage to compatible electronic circuits while the supply remains within its supported operating range.

The LM2577 LM2596 module can be used in suitable low-power battery projects, provided that the battery voltage, converter current capability and output power requirements are properly matched.

Important: This standard module is not a dedicated lithium battery charger or battery management system. Do not use it for charging lithium batteries unless the complete circuit includes appropriate charging control and protection.

LM2577 LM2596 vs LM2596 Buck Converter

• LM2596 Buck Converter: A step-down converter that reduces input voltage to a lower output voltage.
• LM2577 LM2596 Dual-Chip Converter: Combines boost and buck conversion to support adjustable outputs above or below the input voltage.

Choose the dual-chip module when the power source may be higher or lower than the required output voltage.

Advantages of the Dual-Chip Buck-Boost Converter

Versatile Voltage Conversion: Supports step-up and step-down voltage regulation.

Adjustable Output: Allows users to select an output voltage suitable for compatible electronics.

Convenient Connections: Screw terminals simplify wiring during prototyping and testing.

Compact Design: Combines the regulator circuits on one PCB.

Educational Value: Useful for learning switching power supplies, voltage regulation and DC-DC conversion.

Important Safety and Usage Notes

• Use a regulated or otherwise suitable DC input source within the board's rated voltage range.
• Observe input and output polarity.
• Always measure output voltage before connecting your load.
• Do not exceed the module's continuous current or thermal limits.
• The advertised 3A maximum is not a guaranteed continuous output rating.
• Actual current capability decreases under demanding step-up conditions.
• Provide ventilation and monitor temperature under load.
• Do not short-circuit the output.
• Do not connect the module directly to AC mains.
• The module does not provide galvanic isolation.
• It should not be treated as a certified charger or battery protection circuit.
• Do not assume constant-current regulation unless your specific board includes a verified current-control function.
• Check the actual PCB specifications because LM2577/LM2596 modules are manufactured in different configurations.

Package Contents

• 1 x LM2577 LM2596 Dual-Chip DC-DC Buck-Boost Converter Module

Buy LM2577 LM2596 Buck-Boost Converter in Pakistan

Looking for an LM2577 LM2596 Dual-Chip Buck-Boost Converter in Pakistan? Shop online at Robostan.pk for DC-DC voltage regulators, adjustable power supply modules, LM2596 buck converters, electronic components and robotics accessories.

This module is suitable for electronics students, engineers, hobbyists and makers developing adjustable low-voltage DC power supply projects.

Order your LM2577 LM2596 Step-Up 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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