MIC29204BM

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• MIC29204BM Application Field and Working Principle

The MIC29204BM is part of a family of ultra-low dropout linear regulators (LDOs) from Micrel, Inc. The device is designed to provide fixed output voltage of either 1.8V, 2.8V, 3.3V, or 5.0V from a 0.3V to 5V input range. The MIC29204BM is ideal for powering digital and analog components and peripherals such as microprocessors, DSPs, digital media processors, and RF circuits.

The MIC29204BM integrates a high-performance bandwidth optimized low drop-out voltage regulator with low noise output, fast transient response, low ground current, and low quiescent current. The device is optimized for minimum drop-out voltage, not power dissipation, offering excellent low drop-out performance while maintaining tight output voltage regulation. The MIC29204BM is packaged in a space-saving 11-lead Ultra Thin Small Outline Out-line Package (USP-11).

The MIC29204BM can be used as either a linear regulator, switching regulator, or composite synchronous-buck regulator. Its low drop-out voltage of 0.4V enables minimum energy loss for battery-powered applications. The device is protected from short-circuit and over-current conditions by integrated current limit and thermal shutdown. Cycle-by-cycle current limit and thermal shutdown also protect against excessive power dissipation.

The MIC29204BM linear regulator consists of an internal voltage reference and an error amplifier connected between an external Sense pin and the output. The voltage reference sets the average output voltage and the error amplifier compares the output voltage and the Sense pin voltage to control the current through the pass element. The pass element is a series N-channel MOSFET and its output current is controlled by the error amplifier. In normal operation, the feedback loop keeps the output voltage within the regulation window.

The MIC29204BM features low drop-out voltage, low output noise, fast transient response, and internal current limit and thermal shutdown protection. The device also features a programmable output capability which allows the user to set the output voltage using external resistors. The input voltage range and low drop-out voltage make this device ideal for powering microprocessors, DSPs, digital media processors, and RF circuits from a single supply battery.

The MIC29204BM is a versatile LDO device, offering excellent performance and efficiency in a small package size. The device is capable of providing precise output voltages for low power and low drop-out applications. Its low drop-out voltage, fast transient response, and programmable output capability make it ideal for use in portable and battery-powered applications.

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