TPS51211DSCT

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The TPS51211DSCT is a fully-integrated device designed to significantly reduce the overall solution size and board space required for sub 5-volt solutions. It is part of Texas Instruments\' family of low voltage Special Purpose Voltage Regulators (SPVRs).

TPS51211DSCT Application Field

The TPS51211DSCT is ideal for applications requiring a lower voltage than the original 5V. The device provides an adjustable output voltage that can be set as low as 0.6V with a fixed output current. It also provides excellent stability, making it well-suited for powering lower voltage processors, memory and other components in a variety of applications.

The TPS51211DSCT is particularly ideal for portable and mobile applications requiring the lowest possible power consumption. Since the device is a fully integrated solution, there is no need to add additional passive components to regulate the output voltage. The device simplifies board design and reduces board space by integrating multiple functions including power supply sequencing, rail droop control, and short-circuit protection in an ultra-small form factor.

The device also provides input voltage sensing, selectable output voltage ranges, and programmable current limit features. With its exceptional features and small size, the TPS51211DSCT is an ideal PMIC solution for modern portable and mobile applications.

TPS51211DSCT Working Principle

The TPS51211DSCT uses a single switch synchronous boost (step-up) converter to generate its output voltage. During normal operation, the internal power switch is turned on, and the output voltage is regulated by regulating the current through an inductor. As the inductor carries current, an energy stored in the magnetic field of the inductor induces a voltage across the inductor. This voltage is applied across the output capacitor, which provides the output voltage for the system.

The device also utilizes a hysteretic current-mode control system. This system senses the current through the inductor and adjusts the duty cycle of the power switch accordingly. When the current reaches the set level, the power switch is turned off, and the energy stored in the inductor is discharged into the system. The cycle is then repeated, producing a steady output voltage.

The TPS51211DSCT also features several important protection features, including short-circuit, overload, and overvoltage protection. The short-circuit protection mechanism limits the output voltage when a short circuit is detected. The overload protection limits the current through the inductor to prevent damage to the system. The overvoltage protection prevents the output voltage from rising above a specified level.

Conclusion

The TPS51211DSCT is a fully integrated Special Purpose Voltage Regulator (SPVR) designed to simplify board design and reduce board space. Its adjustable output voltage, low voltage capabilities, and exceptional stability make it well-suited for powering low voltage processors, memory, and other components in various portable and mobile applications. The device also incorporates a hysteretic current-mode control system and several protection features, making it a reliable solution for modern electronics.

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