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PMIC - Voltage Regulators - Special Purpose

The RT9173AGM5 is a special-purpose voltage regulator manufactured by Richtek Technology Corporation. It is an efficient and configurable step-down regulator that is optimized for a wide range of applications, from low-current DC/DC converters to high-current single-cell Li-Ion battery chargers. The RT9173AGM5 features a 1005 package, a built-in inductor, and a low-noise, low-dropout (LDO) power supply.

The RT9173AGM5 voltage regulator provides highly efficient and very low noise operation. It is able to automatically switch among its three power modes, or two output voltage settings, based on the input voltage levels, accounting for changes in load current levels or battery voltage. The output voltage range from 1.0V to 5.0V, with a low dropout voltage of 40 mV at 1 A continuous output current.

The RT9173AGM5 integrates a high-efficiency switch mode regulator and a low-noise LDO regulator into one device, ensuring low noise output with minimal artifacts and high efficiency over the full range of output voltages. Moreover, the integrated inductor and switch enable space savings and minimal external components. The output voltage is one of the lowest-noise solutions available on the market today, allowing low-noise, high efficiency design solutions.

The RT9173AGM5 features an adjustable soft-start mode and a built-in over-temperature protection circuit. The soft-start mode ensures a smooth start-up of the system and reduces inrush current and the over-temperature protection compounds the reliability of the system by limiting the temperature rise during the system start-up, thus protecting the device from being damaged due to high temperatures.

The RT9173AGM5 is suitable for a wide range of applications, such as standard DC/DC converters and battery chargers, as well as for high current single-cell or two-cell battery chargers for automotive, industrial, and cellular applications, and portable electronics and handhelds. Its design is optimized for ultra-low noise, high efficiency, and high current capability.

Richtek Technology Corporation’s RT9173AGM5 is the ideal voltage regulator for system designs requiring high efficiency, low noise, and high current capability in a compact, low profile package. In addition, its integrated features, such as the over-temperature protection, soft-start, and LDO regulator, provide an enhanced level of integration and protection, ensuring a reliable and efficient design solution.

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