MCP19117-E/MQ

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The MCP19117-E/MQ from Microchip is a family of high-performance, digital, fixed-frequency, step-down (Buck) DC-DC switching controllers. The devices are ideally suited for low output voltage, high-current, high-efficiency applications.

Features

• Fixed-frequency operation.
• Integrated fixed-frequency Pulse Width Modulation (PWM) control.
• Integrated high-side and low-side MOSFETs.
• Adjustable operating frequency.
• Programmable soft-start.
• Low quiescent current.
• Thermal shutdown.
• Selectable under-voltage lockout thresholds.
• Power calibration.
• Leading-edge blanking.
• Adjustable dead time.
• Load disconnect during shutdown.

The MCP19117-E/MQ family consists of four digital controllers with enhanced features that enable high-performance, high-efficiency DC-DC power conversion with minimal external components. The devices have integrated four high-current MOSFET drivers, which enable fixed-frequency PWM operation without the need for an external oscillator. The MCP19117-E/MQ family includes adjustable operating frequency, programmable soft-start and adjustable dead time for improved efficiency.

Applications

The MCP19117-E/MQ family is well-suited for a wide range of applications including microprocessor, ASIC and DSP-based systems. Examples of applications include automotive, industrial, communications, computing, consumer and audio/video. The devices are cost-effective solutions for high-efficiency, high-current applications where a low output voltage is required.

Working Principle

The MCP19117-E/MQ family of devices operates using integrated Pulse Width Modulation (PWM) control. The PWM output of the device is configured to generate a fixed-frequency switching signal that is proportional to the output voltage. The MCP19117-E/MQ family integrates two high-side and two low-side MOSFET drivers that provide a high-level of integration, minimal external components and high-efficiency operation. The integrated drivers eliminate the need for an external oscillator, enabling higher efficiency than conventional step-down DC-DC controllers. The devices support leading-edge blanking which further improves the efficiency of the system.

The MCP19117-E/MQ family also features several adjustable parameters that enable the user to optimize the system for a particular application. The adjustable parameters include the operating frequency, programmable soft-start, adjustable dead time and selectable under-voltage lockout thresholds. These features make the MCP19117-E/MQ family of devices a cost-effective solution for high-efficiency, high-current applications where a low output voltage is required.

Benefits

• High-performance, high-efficiency operation.
• Integrated power MOSFET drivers.
• Low output voltage, high-current capability.
• Adjustable operating frequency.
• Programmable soft-start.
• Load disconnect during shutdown.
• Selectable under-voltage lockout thresholds.
• Leading-edge blanking.
• Adjustable dead time.

The MCP19117-E/MQ family of devices from Microchip is an ideal solution for high current, low output voltage applications that require high efficiency and performance. The integration of power MOSFET drivers, adjustable operating frequency and programmable soft-start make the MCP19117-E/MQ family an excellent choice for a wide range of applications.

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