TPS61222MDCKTEP Integrated Circuits (ICs)

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TPS61222MDCKTEP is a DC/DC step down converter integrated by Texas Instruments. It adopts high-voltage process and provides an integrated TDFN (thinner Dual Flat No-lead) package. This device uses current mode control architecture and has strong anti-interference ability. It provides a wide input voltage range of 2.2V to 16V, which greatly increases system design density and performance. It offers a maximum output current up to 3A. The device supports low ESR output capacitors and power-saving features, such as Burst Mode operation, no-load quiescence current, pulse-skipping and pulse-by-pulse current limit.

TPS61222MDCKTEP Application Field

TPS61222MDCKTEP is a low-cost, high-performance synchronous DC/DC step-down converter, which can be widely used in very diversified applications, such as digital cameras, PDAs, barcode readers, wireless handsets and wearable devices. It is an ideal solution for devices powered by Coin-Cell, one or two Li-Ion batteries, or a combination of both. Its low quiescence current makes it suitable for battery-powered systems or battery back-up applications, where high efficiency and low stand-by current are essential.

TPS61222MDCKTEP Working Principle

TPS61222MDCKTEP is a synchronous DC/DC step-down converter based on current mode architecture. It uses two external N-channel MOSFETs to convert an input voltage VIN to a regulated voltage at the output Vout. The power switching MOSFETs are driven by two drivers, which work in complementary phase. The input voltage is regulated by varying the duty cycle of the top MOSFET drive signal, while the bottom MOSFET drive signal has a fixed duty cycle. This makes TPS61222MDCKTEP suitable for a wide input voltage range. The on-time of the top MOSFET drive signal is automatically adjusted by the internal current mode controller to regulate the output voltage.

The switching frequency of TPS61222MDCKTEP is adjustable, ranging from 200kHz to 1.5MHz. This can provide designers with flexibility to customize the system to meet their needs.The device includes a soft-start/sequencing function which provides gradual start-up from light load without inrush current spike. An over-voltage protection circuit and a thermal protection circuit are integrated to ensure system reliability.

Conclusion

TPS61222MDCKTEP is a high-performance DC/DC step down converter with wide input voltage range and low quiescence current. It adopts current mode control architecture and strong anti-interface ability to provide a safe and reliable voltage conversion between the input and output. It can be widely used in digital cameras, PDAs, barcode readers, wireless handsets and other smart devices. By adjusting the switching frequency, designers can customize the system according to their application requirements.

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