LM22678TJ-ADJ/NOPB

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The LM22678TJ-ADJ/NOPB is a monolithic synchronous buck regulator buck converter suitable for a variety of applications including: battery powered devices, portable devices and telecommunication systems.

The LM22678TJ-ADJ/NOPB is designed to operate as a buck regulator in four basic modes: low-noise PWM mode, fixed frequency PWM mode, Pulse Frequency Modulation (PFM) mode, and Burst Mode™ operation. In each mode the output voltage remains in regulation and the output current remains constant.

The LM22678TJ-ADJ/NOPB includes two integrated MOSFETs. An integrated, low on-resistance high-side MOSFET provides high efficiency conversion with low component count. An integrated N-channel MOSFET provides high efficiency at lower voltage steps and minimum component count for low output power applications.

An input voltage operating range of 2.6V—16V, allows for use in numerous portable, telecom and CPU core power supplies applications. The device works from a wide range of input voltages, from a variety of power sources, such as: 4.5V—14V lead-acid or Li-Ion batteries, automotive or wall supplies, or USB supplies.

The device also features true concurrent mode operation. This feature provides low output ripple no matter the input voltage. This allows very small output capacitors to be used and significantly reduces power loss.

The LM22678TJ-ADJ/NOPB also provides an adjustable output voltage range. The adjustable output voltage feature simplifies design in systems where the exact output voltage required is unknown. This device also provides a wide range of output voltage scaling, providing flexibility for different power supply applications.

The LM22678TJ-ADJ/NOPB also features an adjustable switching frequency. This allows for optimization of loop stability and electromagnetic interference (EMI) in your application. The LM22678TJ-ADJ/NOPB also includes programmable soft start, which limits inrush current for applications requiring high capacitance load.

The LM22678TJ-ADJ/NOPB has a wide operating temperature range of -40°C to +125°C, making it suitable for use in many different applications. This device also has a wide input voltage range and operates at a high efficiency over the entire operating range.

The LM22678TJ-ADJ/NOPB is available in 3.3V, 5V, and 12V output voltage versions. The device is offered in a thermally-enhanced 8-pin micro-size 800-mil PowerPAD™ package.

Working Principle

The LM22678TJ-ADJ/NOPB works on the principle of pulse width modulation (PWM). The input voltage is regulated to a desired level using an integrated MOSFET. The output of the MOSFET is connected to a load. The PWM then pulses the load on and off. The frequency of the pulses is regulated by an integrated oscillator, known as a clock. The duty cycle of the pulses determines the peak voltage of the output, which is then regulated by the internal compensation circuitry.

The result is a smooth and regulated DC power supply. The input voltage is not directly proportional to the output voltage, making it more efficient and stable than other topologies. The LM22678TJ-ADJ/NOPB also features an integrated low-side MOSFET, reducing the total cost and eliminating the need for an external power switch.

The LM22678TJ-ADJ/NOPB also features a range of adjustable parameters, allowing the design engineers to optimize their products to their exact specifications. These parameters include an adjustable output voltage, an adjustable switching frequency, an adjustable soft-start, and a programmable dead-time control.

Application Field

The LM22678TJ-ADJ/NOPB is optimized for a variety of applications, including battery powered devices, portable devices, and telecom systems. The device is suitable for 4.5V—14V lead-acid and Li-Ion batteries, and automotive or wall supplies. The device has been designed with an adjustable output voltage feature, making it suitable for a wide range of voltages needed in a variety of applications.

The device can also be used to step down a higher input voltage in order to meet the requirements of different systems. The device is also suitable for telecommunications and computing systems, as it is able to handle higher power output without too much loss, due to its high frequency switching capability.

It can also be used to drive memory and ASIC supplies, with multiple output options available.

Finally, the LM22678TJ-ADJ/NOPB is suitable for miniature power systems, due to its small size and high performance levels.

Conclusion

The LM22678TJ-ADJ/NOPB is a monolithic synchronous buck regulator buck converter suitable for a wide range of applications, such as battery powered devices, portable devices, telecommunication systems, and more. The device is able to operate over a wide input voltage range and to provide an adjustable output voltage, while still maintaining high efficiency. The device is also designed with an adjustable switching frequency, adjustable soft-start, and programmable dead-time control, providing flexibility and optimal product performance. The device is available in 3.3V, 5V, and 12V output voltage versions, and is offered in a thermally-enhanced 8-pin micro-size 800-mil PowerPAD™ package.

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