TPS61222DCKR

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TPS61222DCKR is a high-efficiency DC-DC switching regulator, integrated with a 4A standard N-channel power switch MOSFET and power switch driving circuit, efficiently managing supplying power and providing boost current, step-up/down/inverting voltage, etc. It has low quiescent current and very fast transient response overload, integrated soft-start ramp control and enable terminal features for easy control. Its stable output and very low quiescent current make it ideal for mobile electronics and portable applications.

Application field

TPS61222DCKR is best used for powering low-voltage devices like mobile phones, MP4 players, digital cameras, GPS devices, portable media players etc. Its minimum operating voltage is 2V, and its maximum operating voltage is 5.5V; this makes it suitable for powering both low-voltage as well as higher-voltage systems. It also depends on the nature of the device to be powered; some lower-voltage devices require specialized circuits to power them, and TPS61222DCKR helps to provide such circuits. TPS61222DCKR is also used in various other applications such as lighting, motor control, automotive, home appliances and industrial systems.

Working principle

The TPS61222DCKR is designed to work on the buck-boost converter topology, which allows for a higher step-up or step-down current for power supply. It is an advanced switch mode power supply providing high efficiency, low ripple and higher output voltage. It is composed of two power MOSFETs, one in the switch mode and one in the boost mode. The switch mode MOSFET provides brief switching pulses and the boost mode MOSFET supplies the current for the output voltage conversion.The TPS61222DCKR features two operating modes, the buck mode and the boost mode, by means of a fixed frequency PWM controller. In buck mode, the device\'s input voltage is reduced, while in boost mode, the device\'s output voltage is increased. When the device is in buck mode, the switch mode MOSFET acts as an electronic switch and the boost mode MOSFET is off. When the device is in boost mode, the switch mode MOSFET is off and the boost mode MOSFET acts as current source. The switching is controlled by the external switching IC internally connected to the boost mode MOSFET. The device is available in various output voltage levels and they can be preset by an external resistor divider. It also has an adjustable output current limit and over temperature protection.

Conclusion

TPS61222DCKR is a highly efficient, low power switch mode DC-DC voltage regulator. Its small size, high efficiency and high output current make it ideal for powering mobile electronics and portable applications. It uses a buck-boost topology which provides a high step-up or step-down current for the power supply. It has an adjustable output current limit and over temperature protection which make it an ideal device for powering low voltage and higher voltage systems. Its integrated soft-start ramp control and enable terminal features allow for easy control and optimized performance.

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