RAA230215AGSB#HA0

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Part Status:	Active

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Introduction to RAA230215AGSB#HA0

RAA230215AGSB#HA0 is a linear + switching voltage regulator integrated circuit (IC) for power conversion applications. This dual-phase buck regulator combines a low-noise linear (LDO) regulator with a voltage-regulated boost converter to enable maximum efficiency for systems operating within a wide input voltage range, and enabling high output current capability.

Application Field of RAA230215AGSB#HA0

RAA230215AGSB#HA0 is ideally suited for use in a variety of applications, including portable and mobile devices, storage systems, PC peripherals, and embedded systems requiring a low-power, low-noise voltage regulator. A variety of external components and configurations must be considered when designing an electronic system that uses RAA230215AGSB#HA0. External capacitors are typically used to filter the DC output voltage. It also provides several output current limit options that can be enabled to protect external components by limiting the peak current in the load.In systems with high load current transients, multiple output voltage rails can be combined to ensure proper voltage stabilization. RAA230215AGSB#HA0 supports a wide range of operating voltages and can achieve a maximum output current of 5A.

Working Principle of RAA230215AGSB#HA0

RAA230215AGSB#HA0 has two stages of operation: the linear regulator stage and the switching regulator stage. The linear regulator draws a constant current from a high input voltage, dropping it to a low-noise output voltage. This low-noise voltage is then used to power the switching regulator, which serves to successfully regulate the output voltage of the IC. The linear regulator is designed to provide the full load current without switching noise, and its output voltage is adjustable. In order to prevent the linear regulator output voltage from dropping too low during heavy load transient operation, a well-designed linear regulator control loop with a fast response is essential. The switching regulator is built of a buck converter and it is responsible for regulating the output voltage from the linear regulator. The switching regulator is divided into two parts: the Buck-Boost converter, which is responsible for regulating the output voltage when it must be lower than or higher than the input voltage, and the direct buck converter, which is responsible for regulating the output voltage when it is greater than or nearly equal to the input voltage. The latter is able to deliver a higher output current. The RAA230215AGSB#HA0 IC also provides a feature of current limiting that can be enabled to protect external components by limiting the peak current in the load. This is done using a fast transient response so that the current in the load is not allowed to exceed the set peak current limit.

Conclusion

RAA230215AGSB#HA0 is an ideal power regulation IC for applications such as portable and mobile devices, storage systems, PC peripherals, and embedded systems. It is able to achieve a high level of efficiency across its wide input voltage range and high output current capability. It is also equipped with a current limit feature to protect other components in the system from any over-current conditions. The dual-stage approach taken by this IC is effective in providing a low-noise, stabilized output voltage.

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