LM2853MHX-1.0

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LM2853MHX-1.0 Application Field and Working Principle

LM2853MHX-1.0 is a highly integrated synchronous DC-to-DC buck regulator that provides power supply design engineers with an efficient and low noise voltage solution in applications requiring up to a 5 A output current. It belongs to the category of PMIC that includes Voltage Regulators and DC DC Switching Regulators.

The LM2853MHX-1.0 provides an integrated solution that combines a high performance synchronous Buck switching regulator and low dropout linear regulator along with pre-bias enable and power-good logic. The switching regulator converts an input voltage range of 2.2 V to 8 V to an output voltage of up to 0.8 V with the addition of an external bypass capacitor. The regulator features a switching frequency of up to 600 KHz, providing a greater level of efficiency than standard low dropout linear regulators. In addition, the device features a gate driver circuit that permits multiple devices to be paralleled.

The device has a maximum input voltage up to as much as 8V, making it ideal for applications requiring a wide range of input voltage specifications. The device is also capable of a wide range of output voltages, down to as low as 0.8V, with step down ratios of up to 20V. This makes the device ideal for applications requiring a wide range of output voltage specifications, such as LED drivers, LED display control circuits, low voltage control circuits and battery charge controllers.

In addition to its high input and output voltage ranges, the LM2853MHX-1.0 also features advanced power management capabilities. It includes a selectable current limiting feature that allows the device to limit the load current if it reaches an out-of-specification level. It also features a power good function that monitors the output voltage and Load Current to ensure that it is within specification. If the voltage or the current are not within specifications, the power good signal will be de-asserted, signaling that the output voltage is not correct.

The LM2853MHX-1.0 utilizes synchronous rectification for improved efficiency and a dynamic Vout for more precise output voltage control. Synchronous rectification is a process that converts the alternating output voltage from the switching regulator into a direct current. This process improves the efficiency of the output and, in turn, reduces power loss. Additionally, the dynamic Vout allows the regulator to dynamically adjust the output voltage to maintain a constant voltage level, even when the load current changes or the input voltage varies.

The LM2853MHX-1.0 provides an excellent solution for DC-to-DC regulation applications. By offering high performance and advanced power management capabilities, it can help designers ensure maximum system efficiency and a reliable voltage and current control.

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