Mini-360 DC-DC Synchronous Buck Converter: Ultra-Small Module with Wide 4.75-23V Input

For electronics enthusiasts, makers, and engineers working on portable or space-limited projects, finding a reliable and compact voltage regulator is a common challenge. The Mini-360 DC-DC buck converter directly addresses this need. This non-isolated step-down module takes a wide input voltage range of 4.75V to 23V and efficiently converts it to a user-adjustable output between 1.0V and 17V. Its key advantage lies in its exceptionally small footprint—just 17mm by 11mm—and its use of synchronous rectification technology to minimise energy loss. Whether you're prototyping a battery-powered device, building a robotics platform, or creating custom LED lighting, this module provides a practical and efficient way to manage your circuit's power requirements.

Features and Construction

The Mini-360 buck converter is built around core specifications that define its performance and suitability for various applications. Its construction utilises modern power conversion techniques to balance size, efficiency, and output stability within its compact form factor.

Material and Build

The module's construction centres on an integrally moulded power inductor, which contributes to its small overall size and robust physical structure. This is paired with a synchronous rectifier control chip, a design choice that directly enables its high efficiency. Unlike traditional buck converters that use a diode, synchronous rectification uses a controlled switch, significantly reducing the forward voltage drop and associated power loss. This is the technical basis for the module's stated maximum conversion efficiency of 96%.

Size and Practical Fit

With external dimensions of 17mm in length, 11mm in width, and a height of 3.8mm, the Mini-360 lives up to its name. This ultra-small size makes it an ideal choice for projects where board real estate is at a premium, such as in wearable electronics, drone avionics, or densely packed sensor modules. Its compact design does not come at the expense of a broad operational range, as it functions reliably across an ambient temperature span from -40°C to +85°C.

Uses and Placement

The module's specifications lend themselves to distinct categories of use, from professional prototyping to everyday hobbyist projects. Its wide input range and adjustable output provide the flexibility needed for diverse electronic applications.

Event or Professional Use

In professional or event settings, reliability and specification adherence are paramount. The Mini-360's performance metrics, such as its ±2.5% voltage regulation and ±0.5% load regulation, indicate a stable output suitable for powering sensitive microcontroller units (MCUs), sensors, or communication modules. Its ability to handle input voltages up to 23V makes it compatible with a variety of power sources, including 12V or 19V laptop adapters, or multi-cell lithium battery packs. The 30mV no-load output ripple is a relevant figure for audio circuits or analogue sensor interfaces where clean power is critical.

Everyday Home Use

For the home electronics workshop, this module simplifies many common tasks. It can be used to create a benchtop adjustable power supply from an old laptop charger, step down a 12V battery voltage to 5V for USB-powered devices, or provide the correct voltage for LED strips and other low-voltage lighting. The green PCB offers clear visual identification of connection points. Users should note the current limits—1.8A continuous, 3A peak—and ensure their load does not exceed these values for safe, long-term operation.

Benefits and Buying Value

The value of the Mini-360 converter is rooted in its combination of verified performance data and practical physical design. It offers a specific set of advantages for users who need a dependable voltage step-down solution without unnecessary bulk or complexity.

Reuse and Low Maintenance

The module's solid-state design with an integrally moulded inductor means there are no moving parts to wear out, contributing to a low-maintenance profile. Its wide operating temperature range and robust construction suggest it can be integrated into a final project and left to operate unattended. The synchronous rectification circuit not only boosts efficiency but also typically runs cooler than non-synchronous designs, which can contribute to long-term reliability in enclosed spaces.

Why Choose This Product

When selecting a DC-DC converter, key decision factors often include input/output range, size, efficiency, and current capability. The Mini-360 provides concrete data for each: a 4.75-23V input, 1-17V adjustable output, a 17x11mm footprint, 96% max efficiency, and a 1.8A continuous current rating. For users whose projects require one or more of these specific parameters—particularly the very wide input range coupled with the very small size—this module presents a clear and fact-based fit. It eliminates guesswork by providing all necessary electrical and physical specifications upfront.