The MCP19125 is a mid-voltage (4.5-42V) analog-based PWM controller with an integrated 8-bit PICTM Microcontroller. This unique product family combines the performance of a high-speed analog solution, including high-efficiency and fast transient response, with the configurability and communication interface of a digital solution. Combining these solution types creates a new family of devices that maximizes the strengths of each technology to create a more cost-effective, configurable, high-performance power conversion solution. These products allow the development of flexible power supplies that can be configured perfectly to the target application with minimal external components. In addition, these devices can be programmed to dynamically respond to measurements or events within the system, dynamically tailoring the operation to the environment, or intelligently responding to faults for robust operation.
This device contains two independent outer control loops, which can be configured with separate feedback networks, and separate references. The analog voltage loop can be set to control a constant voltage, or the analog current loop can be used to set a constant current on the output. Regardless of which outer loop is being used, both outer loops take advantage of a faster, inner current loop for peak current mode control with fast transient response. With this unique architecture, switching between constant-voltage and constant-current operation is smooth and monotonic; it can be done dynamically during operation without glitching or undesirable transient effects.

  Smooth, dynamic transitions from constant-current to constant-voltage operation using the unique control loop architecture

  Dynamically adjustable output current and output voltage over a wide operating range

  Wide operating voltage range: 4.5-42V

  Analog peak-current mode Pulse-Width Modulation (PWM) control

  Integrated 8-Bit PIC® Microcontroller

  Significant configurability: adjustable output voltage, output current, MOSFET deadtime, leading edge blanking time, thermal responses, slope compensation, over-current protection, over and under voltage lockout levels

  Available fixed frequency or quasi-resonant operation, adjustable 31 kHz to 2 MHz

  I2C communication interface

  13 GPIO

  Integrated synchronous low-side MOSFET drivers

  Integrated high voltage linear regulator, with external output

  Integrated temperatures sense diode

  Integrated 10 bit A/D converter

  Minimal external components needed

  Custom algorithm support

  Topologies supported include Boost, SEPIC, Flyback, and Cuk