MIC2205BML TR

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The MIC2205BML TR is a high-performance, low-side synchronous step-down DC-DC converter from Microchip Technology. It is a step-down DC-DC converter designed to provide a regulated voltages from a single cell lithium-ion battery source to power sensitive applications in space-constrained systems. It utilizes a 2.0 MHz switching frequency, programmable via an external resistor, along with patented conversion technology to achieve low output noise and high efficiency. It also offers short circuit protection, extensive load-line accuracy, adjustable current limit and thermal protection.

The MIC2205BML TR is targeted for applications such as PDAs, cell phones, digital still cameras, Bluetooth and GPS applications, or anywhere a low-voltage, high-efficiency DC-DC converter is required. The voltage of the output is adjustable via an external resistor and can provide up to 1.5 amps of continuous output current. The MIC2205BML TR utilizes a cycle-by-cycle current limit detection, ±3% high/low voltage tracking accuracy, high/low line transient response, and programmable soft-start time with a wide input voltage range from 2.6V to 5.5V.

The DC-DC converter works based on the principle of capacitive step-down regulation. It steps down a high voltage input to a lower regulated voltage output using an inductor, a capacitor, and one or more power MOSFETs. A power MOSFET is a voltage-controlled, unipolar transistor that utilizes positive gate voltage to turn the device on. The high voltage source is connected to the gate of the MOSFET through the inductor, and when the gate voltage is increased, the MOSFET is turned on and a current path is enabled from the source to the load. The capacitor is used to regulate the output voltage by storing charge and discharging it to the load when the inductor current is sufficient to provide the correct voltage for the load. The MIC2205BML TR can also provide load line accuracy and output voltage tracking capability.

The DC-DC converter is a cost-effective, low-noise, high-efficiency solution for powering sensitive applications in a variety of different systems. It offers low output ripple, fast transient response, and low output noise, enabling improved power density and quick response times. Additionally, the high-side Current Limit Function provides increased safety and a dynamic adjustability of the current limit. The adjustable frequency allows further optimization and synchronization with external components, such as filters, batteries, or other peripherals.

In summary, the MIC2205BML TR is a high-performance, low-side synchronous step-down DC-DC converter designed for space-constrained systems. It provides low output noise and high efficiency, with adjustable voltage and current limit, transient response and load line accuracy, Thermal protection and short-circuit protection functions. It operates on an adjustable frequency, and offers an adjustable soft-start for optimized control of battery current and extended battery life. It is an ideal solution for powering sensitive applications in portable, battery-powered systems.

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