The single-chip MCP19122/3 solution offers industry-leading flexibility

The MCP19122/3 Digitally
Enhanced Power Analog (DEPA) buck controller suits dc/dc power conversion. The
single-chip solution controls dc/dc converters and is capable of accepting a
high-voltage input (up to 42 V) while regulating an output voltage range from 0.3
to 16 V without any external components or drivers.

The internal PIC
microcontroller in the MCP19122/3 dynamically adjusts the operating frequency,
over- and under-voltage lockout thresholds, current limits, soft-start, voltage
or current output setpoints, and maximum duty cycle. The device dynamically
adjusts the voltage output to meet USB PD requirements, while also adjusting
the output over-voltage lockout to maintain tight protection limits
corresponding to each output voltage level.


MCP19123 Press Presentation r7



The MCP19123 buck
controller offers a programmable differential input amplifier used to optimize performance
and minimize system voltage error. This configurability allows for an output
voltage range commonly seen in USB power and battery charger applications. The
device can synchronize to an external clock and voltage reference, or provide
the internal system clock and reference to other devices for synchronization.


In server or
communications equipment, this allows for seamless power up and accurate
tracking of power consumption throughout the board. For high-power applications,
multiple outputs can operate in parallel providing system redundancy for
improved system reliability. Combined with an on-board programmable diagnostic
and fault detection capability it targets high-performance intelligent power applications.


This device also
offers excellent accuracy for an adjustable output power supply. A MCP19122/3 dc/dc
converter implementation maintains an initial 0.5% or better output voltage
accuracy. It offers current measurement by using a lossless inductor current
sense method with specialized internal measurement calibrations. The device can
directly accept a common mode signal up to 16 V and report the load current to
within 5% accuracy for most applications, with an emulated average current mode
control for hardware-based cycle-by-cycle current limiting.


The devices are
supported by Microchip’s suite of programming and development tools including
MPLAB X Integrated Development Environment (IDE) and the MPLAB XC8 complier.


The MCP19122 is
available today in a 4 x 4 QFN package for sampling and in volume production
starting at $2.94 each in 10,000 unit quantities. The MCP19123 is available
today in a 5 x 5 QFN package starting at $3.17 each in 10,000 unit quantities. Microchip: