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From ww1.microchip.com
The density of portable electronic equipment requires the design engineer to pay particular attention to a number of important design parameters. For the power conversion circuitry, two of these parameters are the efficiency and the total circuitry footprint. Keeping the efficiency high extends battery life and controls the temperature rise of the equipment. Limiting the circuitry footprint helps minimize the size of the Printed Circuit Board (PCB) and, ultimately, the total cost of the device.
The MCP1612 is an ideal choice for such a design. Since both the switching and synchronous MOSFETs are internal and switching is 1.4 MHz, the inductor, input and output capacitor size is minimized. The output voltage is set by using a simple resistor divider, with a high-bandwidth loop being accomplished by a series resistor capacitor to ground. Efficiencies of 90% and a typical shutdown current of 0.01 µA help to extend battery life.
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DC-DC converter chips provide a regulated DC voltage output from a different, unregulated input voltage.
IC switching voltage regulators are integrated circuits (ICs) that store energy in an inductor, transformer, or capacitor and then use this storage device to transfer energy from the input to the output in discrete packets over a low-resistance switch.
IC power supplies are manufactured as integrated circuits.
Resistor, capacitor networks (RC networks) are integrated circuits (ICs) that contain resistor-capacitor arrays in a single chip.
Passive filters are implemented using only passive components such as resistors, capacitors and inductors. These filters do not produce any amplification of the input signal.
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Topics of Interest
Switching voltage regulators are circuits that use an inductor, a transformer, or a capacitor as an energy-storage element to transfer energy from input to output in discrete packets. Feedback...
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Technical Articles
Simple Synchronous Buck Converter Design - MCP1612 (.pdf)
- Power Supplies and Conditioners
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