MP2307 3A-23V -340Khz Synchronous Rectified Step-Down Converter IC SOP-8

MP2307 3A-23V-340Khz Synchronous Rectified Step-Down Converter IC SOP-8 is a highly efficient monolithic synchronous buck converter designed to deliver up to 3 Amperes of continuous output current over a wide input voltage range. This integrated circuit (IC) efficiently steps down higher DC voltages, converting 4.75 V to 23 V input down to an output as low as 0.925 V, making it versatile for numerous power supply designs. Consequently, the MP2307 integrates the power MOSFETs internally, which simplifies the design process and minimizes the need for external components, ultimately achieving higher power density than non-synchronous alternatives. Operating at a high fixed frequency of 340 kHz, the device minimizes the size of external filtering components, therefore providing an ideal solution for modern, space-constrained, high-efficiency point-of-load regulation.

Key Features:

• High Output Current: The MP2307 is capable of sourcing up to 3 A of continuous output current, supporting demanding power requirements.
• Wide Input Range: Accepts a broad input voltage from 4.75 V to 23 V, accommodating various battery supplies and unregulated DC rails.
• Synchronous Rectification: Integrates both high-side and low-side MOSFETs, eliminating the need for an external Schottky diode and dramatically improving efficiency, particularly at light loads.
• Fixed High Switching Frequency: Operates at a fixed 340 kHz frequency, allowing designers to use smaller inductors and capacitors, furthermore reducing overall solution size.
• Adjustable Output Voltage: Supports a minimum output voltage down to 0.925 V, providing flexibility for different core voltage requirements.

Technical Specifications:

• Input Voltage Range (V_IN): 4.75 V to 23 V
• Continuous Output Current (I_OUT): 3 A Max
• Switching Frequency (F_SW): 340 kHz (Fixed)
• Minimum Output Voltage (V_OUT): 0.925 V
• Integrated MOSFETs: High-Side and Low-Side MOSFETs (Synchronous Rectification)
• Efficiency: Up to 95% (Depending on V_IN/V_OUT)
• Over-Current Protection (OCP): Cycle-by-cycle current limit protection
• Thermal Shutdown: Built-in over-temperature protection

Mechanical Specifications:

• Package Type: SOP-8 (Small Outline Package, 8-pin)
• Mounting: Surface Mount Device (SMD/SMT)
• Thermal Pad: Pin 8 (GND) often serves as an exposed pad for enhanced thermal dissipation.
• Lead Material: Lead frame with standard plating (e.g., matte tin).

Dimensions:

• Body Length (Nominal): 4.90 mm
• Body Width (Nominal): 3.90 mm
• Height (Max): 1.75 mm
• Pitch (Pin to Pin): 1.27 mm (Standard SOP)

Pinout and Wiring:

• Pin 1 (BST): Bootstrap Cap connection. Connect a ceramic capacitor (typically 0.1 μF) between BST and SW pins.
• Pin 2 (IN): Power input pin (V_IN). Requires a bypass capacitor placed close to this pin.
• Pin 3 (SW): Switching Node. Connects to the inductor.
• Pin 4 (GND): Signal and Power Ground. Connect to a wide ground plane for thermal and electrical performance.
• Pin 5 (FB): Feedback Pin. Connects to the output voltage divider network to set V_OUT.
• Pin 6 (EN): Enable Control. Drive high to turn on the chip, drive low to shut down.
• Pins 7 & 8 (GND): Ground connections.

Datasheet Reference:

• Download Monolithic Power Systems MP2307 Datasheet

Commonly Used in:

• Battery Powered Equipment: Efficiently steps down battery voltages (like 12V or 24V packs) to 5V or 3.3V rails for digital circuits.
• Distributed Power Systems: Functions as a high-density point-of-load (POL) converter on system boards and motherboards.
• Automotive Applications: Used in non-critical automotive systems that require robustness across a fluctuating 12 V supply.

Applications:

• Microprocessor/DSP Power Supplies: Provides efficient and stable core voltage regulation for high-speed processors.
• Portable Instrumentation: Maximizes battery life by minimizing power loss during voltage conversion.
• FPGA and CPLD Power: Delivers the necessary power rails (typically below 3.3V) for programmable logic devices.
• DC/DC Converter Modules: Forms the core switching element within compact, off-the-shelf buck converter modules.

Equivalent Models:

• XL4015 (XLSEMI): A similar high-current buck converter, however, it typically operates at a lower frequency and uses an external diode (non-synchronous).
• LM2596 (Texas Instruments): A long-standing, 3A step-down regulator, but the MP2307 provides much higher efficiency and smaller solution size.
• AP3406 (Diodes Inc.): A comparable high-frequency, synchronous buck converter IC with a similar package size and current rating.

Package Includes:

• 1 x MP2307 3A-23V -340Khz Synchronous Rectified Step-Down Converter IC SOP-8