MCP19118-E/MJVAO

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The MCP19118-E/MJVAO device is a high-efficiency, digitally programmable Power System Manager (PSM) device. It is a dual-synchronous step-down DC-DC switching mode converter with an input voltage range of 5V to 38V. It offers versatile features, such as point-of-load regulation and selectable power paths, to power a wide range of applications. It also allows for accurate system control and fault management; this ensures proper system operation even in case of abnormal system conditions. The MCP19118-E/MJVAO is employed in a wide range of applications, from automotive to industrial, including computing, communications and consumer electronics. As one of the newest additions to the Microchip Peripheral Products portfolio, this device offers users the most modern technology for todays designs.

Application Field and Working Principle

The MCP19118-E/MJVAO device is a DC-DC switching mode converter suitable for a variety of applications, such as Step-Down Power Supplies, Voltage Regulation, Active Balancing and Current Sharing. It operates by converting an input voltage to a user-selectable output voltage, while still performing Power System Management tasks. In the case of voltage regulation, the device regulates the output voltage by sensing the output current, then adjusting the Duty Cycle of the Switching Modules. The Duty Cycle of the Switching Modules is adjusted by comparing the sensed voltage of the output voltage with a reference voltage; this is the principle by which the device is able to regulate the output voltage.

The MCP19118-E/MJVAO step-down controller also offers Active Balancing. Active Balancing is used to ensure that the level of current drawn from each of the DC-DC converter switch arms is balanced; i.e. the output current does not vary significantly between the Arms. This is essential for sustaining an even output voltage; otherwise, the output voltage could be disrupted by an imbalance. The Active Balancing function works by monitoring the current values from the two switch arms and adjusting the duty cycle of each switch arm appropriately. The integration of this feature ensures that the output voltage is regulated and in balance.

The MCP19118-E/MJVAO also supports current sharing, which is useful for distributed power systems. Current sharing is implemented by comparing the voltage of the feedback resistors of the two switch arms, and adjusting the duty cycles of the respective switch arms so that the currents are balanced. This ensures that the power supplies are optimally utilized even if the load requirements of the two arms are different.

The MCP19118-E/MJVAO is specially designed to provide ultra-low quiescent current shutdown and power-on reset functions while flowing, low on-resistance MOSFETs help reduce power loss. This helps the MCP19118-E/MJVAO to be efficiently used in today’s applications. The device further reduces power losses by employing spread spectrum frequency modulation, allowing only necessary and moderate switching frequencies to be used.

The combination of features and performance make the MCP19118-E/MJVAO an ideal solution in fields as noted above, as well as others. Its wide range of features and high performance levels make it the perfect choice for applications including computing, communications and consumer electronics, as well as industrial and automotive applications.

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