资料介绍
When designing embedded microcontroller
applications, one of the greatest challenges can be the
creation of the power supply for the microcontroller.
Particularly when the only supply voltage available is
significantly higher than the microcontroller’s maximum
VDD.
To help simplify embedded design, Microchip has
introduced a new feature in a select group of new
microcontroller offerings, a 5V shunt regulator. This
on-chip regulator allows the microcontroller to operate
from a wide variety of supply voltages. As an added
bonus, the shunt regulator topology also allows the
connection of other circuitry, external to the
microcontroller, to be powered by the VDD pin.
This application note discusses the design of power
supply circuits using the new shunt regulator, and
presents some Tips ‘n Tricks for extending the
regulator’s capabilities. AN1035
Designing with HV Microcontrollers
So, all we really need to know to design with a shunt
Author: Keith Curtis regulator is Ohm’s Law. The problem is that the supply
Microchip Technology Inc. voltage, VUNREG, is not constant and neither is the load
current. In addition, the range of current over which the
regulator has control, is also limited. So the choice of
INTRODUCTION RSER really become
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