MIC2951-4.85BM

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The MIC2951-4.85BM is a linear voltage regulator classified under PMIC - Voltage Regulators - Linear. It was designed by Maxim Integrated with the aim to provide mobile and handheld products with compact and cost-effective linear voltage regulation solutions.

The MIC2951-4.85BM supports up to four output voltage options and 4.5V to 28V input voltages. It has an output current of 1.2A and an ultra-low quiescent current of 10μA. With an integrated power switch (DMOS) with a current limit of 1.75A and a shutdown current of 1μA, this linear voltage regulator is an incredibly efficient power solution. It also offers temperature protection, soft-start circuitry, and low ripple properties.

The MIC2951-4.85BM is most commonly used for supplying mobile devices and other battery powered applications, such as digital cameras, personal media players, cellular phones, and notebook computers. It’s also a suitable linear regulator for powering high speed data converters and other applications which require low output voltage.

The MIC2951-4.85BM employs a simple working principle. It uses a voltage reference (usually 2.5V) as a comparison base, which enables it to control its output voltage precisely, usually within ±0.5%. The voltage regulator employs a low on-resistance MOSFET as its pass element. When the output voltage is higher than its reference voltage, the MOSFET is in an ON state and when the output voltage is lower than its reference voltage, the MOSFET is in an OFF state.

The MIC2951-4.85BM also features a shut-down pin which enables the user to power-down the device. When the Shut-Down function is enabled, the MOSFET will be disconnected and the output voltage will be pulled down to the ground level.

To sum up, the MIC2951-4.85BM is a highly efficient linear voltage regulator which provides a compact and cost-effective solution for powering mobile and battery-operated devices. It has a simple working principle and excellent low ripple properties, temperature protection, and soft-start circuitry and is suitable for a wide range of applications including digital cameras and notebook computers.

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