Microchip MCP19111 | Demoboard ARD00609

Description

The MCP19111 device is a highly integrated, mixed signal, Analog Pulse-Width Modulation (PWM) Current mode controller with an integrated microcontroller core forsynchronous DC/DC step-down applications. Since the MCP19111 uses traditional analog control circuitry to regulate the output of the DC/DC converter, the integration ofthe PIC® microcontroller mid-range core is used to provide complete customization of the device operating parameters, start-up and shutdown profiles, protection levels andFault handling procedures.The MCP19111 is designed to efficiently operate from a single, 4.5V to 32V supply. It features integrated synchronous drivers, a bootstrap device, internal linear regulator and 4000 words of nonvolatile memory, all in a space-saving, 28-pin 5 mm x 5 mm QFNpackage.PMBus™ or I2C™ can be used by a host to communicate with, or modify the operation of, the MCP19111. A subset of the commands contained in the “PMBus™ Power SystemManagement Protocol Specification, Revision 1.1” are supported by the ARD00609 board.An internal 5V rail provides power to the PIC MCU and is also present on the VDD pin.It is recommended that a 1 μF capacitor be placed between VDD and PGND. The VDD pin may also be directly connected to the VDR pin or connected through a low-passRC filter. The VDR pin provides power to the internal synchronous driver.

Features

• Input Voltage Range: 8V to 14V
• Output Voltage: 1.2V (can be adjusted by software from 0.1 to 3.6V)
• Maximum Output Current: 20A
• 88% Typical Efficiency at 1.2V/15A output and 12V input
• 500 kHz Switching Frequency (can be software adjustedfrom 100 kHz to 1.6 MHz)
• On-Board High-Performance Power MOSFET Transistors
• Overcurrent and Overtemperature Protection
• Status Report (including errors, input voltage, outputvoltage and current) via the PMBus Communication Protocol
• Precision Op Amp for Accurate Output Current Measurement
• Inductor Temperature Sensor
• Calibration of Output Voltage
• Calibration of Output Voltage and Output Current Measurements (via PMBus)
• Undervoltage Lockout (UVLO) with Programmable (via software) Thresholds
• Output Overvoltage, Undervoltage and Overcurrent Lockout, Programmable viaSoftware
• For Advanced Users (use with caution): Control Loop Parameters and MOSFET’sSwitching Dead Time can also be Adjusted by Software.

More information

• Datasheet
• IC product information