LP873220RHDR

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LP873220RHDR is a synchronous buck regulator. This device provides high efficiency power solutions for DC voltage requirements up to 12V. It current-mode control provides extremely fast transient response and load regulation. It is a cost effective, flexible and robust regulator solution capable of supporting up to 6V outputs at a 12V input voltage. It is ideal for low noise power supply applications.

LP873220RHDR belongs to the PMIC - Voltage Regulators - Linear + Switching family. In this family different devices can be used for different applications. It is used for providing constant voltage output from a wide range of input Voltages. The design of this device consists of the internal switch, a current sensing resistor, a linear regulator, a comparator and a controller.

The linear regulator can be configured in a variety of ways including common ground and non common ground configurations. It is suitable for applications where high efficiency and high power handling capability is required. The linear regulator works as a constant current source when the input voltage is greater than the output voltage. When the output voltage is higher than the input voltage, the current is limited to a maximum of 200mA.

The current sensing resistor helps to limit the maximum current. This can be adjusted to give higher or lower maximum current if required. The current sense resistor is used to detect the input current and to provide feedback to the comparator. The comparator then compares the sensed current to the reference voltage and gives the feedback signal to the controller.

The controller monitors the output voltage and keeps it constant using pulse width modulation. The internal switch is then turned on and off at a frequency determined by the controller. In this way the output voltage always stays constant in spite of changes in the input voltage.

LP873220RHDR is an ideal solution for low noise power supply applications since it has a very fast transient response and low noise level. It also provides high efficiency operation, high power handling capability, and a cost effective solution.

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