MP2315 12V-24V to 5V 3A Super Mini DC-DC Step-Down Buck Module

MP2315 12V-24V to 5V 3A Super Mini DC-DC Step-Down Buck Module is a fingernail-sized (20mm × 11mm) synchronous rectification step-down voltage regulator board based on the MPS MP2315 IC. Accepting a wide 4.5V to 24V DC input, it supports both continuous potentiometer adjustment (0.8V–17V) and rear solder-jumper fixed voltage selection (1.8V, 2.5V, 3.3V, 5V, 9V, or 12V) at up to 3A peak current with 97.5% peak conversion efficiency.

Key Features:

• Dual Regulation Modes (Adjustable 0.8V–17V + 6 Fixed Voltages): Use the front trimmer potentiometer for 0.8V–17V adjustment, or cut the ADJ trace and bridge one of the rear solder pads for a fixed 1.8V, 2.5V, 3.3V, 5V, 9V, or 12V output.
• Sub-Miniature 20 × 11mm Footprint: Standard 2.54mm pin pitch allows it to drop directly into TO-220 7805 linear regulator footprints or tight breadboard spaces.
• 97.5% Synchronous Efficiency at 500kHz: Integrally molded shielded inductor and synchronous MOSFET switches keep ripple down to ~20mVp-p.
• Logic-Level Enable (EN) Control: Dedicated EN pin allows a microcontroller to shut down the regulator output completely in sleep mode.
• Ultra-Low 0.85mA Quiescent Current: Minimizes battery drain in portable LiPo-powered drones, wearables, and IoT sensors.

Technical Specifications:

• Regulator IC: Monolithic Power Systems (MPS) MP2315 (SOT23-8)
• Input Voltage Range: 4.5V to 24.0V DC
• Adjustable Output Range: 0.8V to 17.0V DC (Default Mode via Potentiometer)
• Fixed Solder-Jumper Outputs: 1.8V, 2.5V, 3.3V, 5.0V, 9.0V, or 12.0V DC
• Output Current: 3.0A Peak / 1.5A–2.0A Continuous
• Peak Conversion Efficiency: Up to 97.5% (at 6.5V to 5V 0.7A)
• Switching Frequency: 500 kHz
• Output Ripple: ~20 mVp-p (at 12V to 5V 3A)
• Quiescent Current: 0.85 mA

Mechanical Specifications:

• PCB Material: FR-4 Double-Sided Green Fiberglass Board
• Pin Pitch: 2.54mm (0.1 inch) Breadboard-Compatible Solder Holes (IN+, GND, VO+, EN)

Dimensions:

• Length: 20.0 mm
• Width: 11.0 mm
• Height: 5.0 mm
• Weight: ~1.8 g

Pinout and Wiring:

• IN+ : Connect 4.5V to 24V DC positive input.
• GND (IN- / OUT-): Common ground reference.
• VO+ : Regulated step-down DC output (0.8V–17V or fixed jumper voltage).
• EN : Enable control pin (High/Floating = ON, Low/GND = OFF).
• Fixed Voltage Selection Note: To lock a fixed voltage (e.g. 5V or 3.3V), sever the tiny “ADJ” copper trace on the back of the PCB with a craft knife and bridge ONLY the desired voltage solder jumper pad.

Datasheet Reference:

• Primary IC Datasheet: MPS MP2315 3A 24V 500kHz Synchronous Step-Down Converter Datasheet (PDF)

Commonly Used in:

• Drop-In Switching Replacement for LM7805 / LM7812 Linear Regulators
• FPV Racing Drones & RC Receiver 5V/9V/12V Power Rails
• 12V/24V to 3.3V/5V Microcontroller & Sensor Daughterboards
• Handheld Battery-Operated Test Instruments

Applications:

• Replaces scorching-hot 7805 linear regulators on 12V/24V PCBs with a cool-running 97.5%-efficient synchronous switcher.
• Locks in a vibration-proof 3.3V, 5V, 9V, or 12V rail on FPV quadcopters using the rear fixed-voltage solder jumpers.
• Fits directly on solderless breadboards to provide up to 2A–3A of low-voltage power from a 12V wall adapter.

Equivalent Models:

• DC-DC MP1584EN 3A Step-Down Buck Power Supply Module: Slightly larger 22mm × 17mm 3A adjustable buck converter.
• MP2307 Mini 3A DC-DC Step-Down Buck Converter Power Supply Module: 17mm × 11mm mini 3A buck converter based on the MP2307DN IC.

Package Includes:

• 1 × MP2315 12V-24V to 5V 3A Super Mini DC-DC Step-Down Buck Module