LM22673TJ-5.0/NOPB

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As a form of DC-to-DC switching power supply, LM22673TJ-5.0/NOPB Voltage Regulators are used in various applications from Wireless charger, Intelligent Remote Control and Set-Top Box to multi-function printer, digital camera and other devices. The device is suitable for applications that require low quiescent current and high output voltage accuracy. Due to its simple solution and low component count, the device can significantly reduce the component cost and save space in the PCB.

The LM22673TJ-5.0/NOPB is an ultra-low quiescent current step-up DC-DC switching regulator. The integrated compensation scheme, which consists of a voltage feedback loop and a current limit loop, provides a high output voltage accuracy and wide input voltage range. The device requires only two external feedback resistors to select the output voltage, allowing for a very simple design. The device also uses a proprietary switching algorithm for a very fast transient response, enabling the device to keep up with a variety of load and supply variations.

The device provides a fully integrated power stage that operates from a 1.86V to 5.5V input voltage range. The device offers an adjustable output voltage from 3.3V to 5V with a maximum output current of 2A. The device also integrates a low RDSON high-side switch and an inductor in the power stage for improved efficiency and design flexibility. Additionally, the device provides an ultralow quiescent current of 15uA and a low shutdown current of 0.2uA, allowing for a very efficient design in a low-power system.

The device works by providing a fixed on-time to the high-side switch and the low-side switch of the power stage. When the input voltage is greater than the output voltage, the high-side switch is turned on until the wanted output voltage is reached. During the on-time of the high-side switch, the current flows through the inductor, charging it. When the high-side switch turns off, the current stored in the inductor is discharged through the low-side in order to keep the output voltage voltage constant.

The current limit protect the device from over-current events by disabling the high-side switch when the current limit threshold is reached. The voltage feedback loop ensures that the output voltage will remain stable, regardless of load variations. The voltage feedback loop can also be used to enable the device in/out feature for applications that require ultra-low power in shutdown.

The integrated switching algorithm also provides great flexibility for system design. The device offers a wide range of adjustability for the current limit, switching frequency, soft-start time, and output voltage. Furthermore, the device has a built-in shutdown feature which can be used to put the device into a very low power state when not in use, allowing for further system optimization.

In conclusion, the LM22673TJ-5.0/NOPB is an ultra-low quiescent current step-up switches DC-DC converter. The integrated compensation scheme provides a high output voltage accuracy and wide input voltage range. The integrated switching algorithm also provides great flexibility for system design, allowing for a very easy to design it. The device is ideal for use in applications that require low quiescent current and high output voltage accuracy, including Wireless charger, Intelligent Remote Control and Set-Top Box, multi-function printer, digital camera and other devices.

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