CA1235 Adjustable Step Down Power Module

CA-1235 Adjustable Stepdown Power Module is a highly efficient DC-DC converter, essential for regulating a higher input voltage down to a required lower output voltage with minimal power loss. Utilizing a switching regulator design, this module dramatically outperforms traditional linear regulators, especially when the voltage differential is significant. Its adjustable output feature, typically managed by an onboard potentiometer, gives users the flexibility to precisely set the desired voltage for sensitive electronics, microcontroller projects, or low-voltage power supplies. Engineers and hobbyists rely on the CA-1235 for its ability to shrink bulky power supply needs into a compact, robust component, ensuring stable and clean power delivery to any circuit within its operating range.

Key Features:

• High Efficiency (Switching): Employs buck converter technology, achieving conversion efficiencies often exceeding 90%, which minimizes heat generation.
• Adjustable Output Voltage: Features a multi-turn precision potentiometer (trimmer pot) that allows fine-tuning of the output voltage.
• Wide Input Range: Accepts a broad range of DC input voltages, making it versatile for battery-powered systems and various external power sources.
• Integrated Protection: Often includes built-in safeguards such as over-current protection (OCP) and short-circuit protection (SCP) to protect the module and connected load.
• Compact PCB Footprint: Its small size easily integrates into custom enclosures and tight project spaces.

Technical Specifications:

• Input Voltage (V_IN): Typically 4.5 V to 28 V DC (Must be higher than output voltage)
• Output Voltage (V_OUT): Adjustable from ≈ 0.8 V to 25 V DC
• Maximum Output Current: ≈ 3 A (Recommended continuous operation ≤ 2 A)
• Conversion Efficiency: Up to 93% (varies based on V_IN and V_OUT difference)
• Switching Frequency: ≈ 1.5 MHz

Mechanical Specifications:

• Component Type: Non-isolated Buck Converter (Stepdown)
• Output Adjustment: Onboard Multi-turn Potentiometer
• Mounting: Solder pads or through-holes for integration into a chassis or breadboard.

Dimensions:

• Length: ≈ 22 mm
• Width: ≈ 17 mm
• Height: ≈ 4 mm (excluding pin headers)
• Weight: ≈ 2.5 g

Pinout and Wiring:

• V_IN+: Connect the higher positive input voltage (e.g., 12V battery or adapter).
• GND: The common ground connection for both input and output.
• V_OUT+: The regulated positive output voltage pin, adjustable via the trimmer pot.
• Installation Tip: Always measure the output voltage using a multimeter before connecting any load, to prevent damage from an incorrectly set voltage.

Datasheet Reference:

• Download CA-1235 Module Specification

Commonly Used in:

• Hobby Electronics: Ideal for breadboard and prototype power supplies using microcontrollers.
• RC and Drone Builds: Efficiently stepping down main battery voltage to power 5V or 3.3V flight controllers and accessories.
• Automotive Projects: Creating stable, regulated 5V or 3.3V supply lines from the car’s 12V system.

Applications:

• Sensor Power Supply: Providing stable voltage to noise-sensitive analog sensors.
• Battery Voltage Conversion: Regulating high-voltage lithium battery packs down to usable lower voltages for peripherals.
• DIY Bench Power Supplies: Serving as the core conversion circuit in small, adjustable lab power units.

Equivalent Models:

• LM2596 Module: A bulkier, older generation buck converter, generally less efficient and slower switching.
• MP1584EN Module: Similar compact size and function, often cited as a direct alternative.
• XL4015 Module: A high-current alternative (up to 5A) for applications needing more power output.

Package Includes:

• 1 x CA1235 Adjustable Stepdown Power Module