TPS56221DQPT Integrated Circuits (ICs)

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The TPS56221DQPT is a synchronous buck regulator with fast transient response, high efficiency, and low external component count. The device operates with an input supply voltage range of 4.5 V to 28 V. It is designed to provide a wide variety of output voltage and current ranges while minimizing external components. The device features a rugged current mode control loop, and a pulse-width-modulated (PWM) controller to provide good current and voltage regulation. The output voltage is adjustable from 0.6 V to 20 V with an external resistor.

Application Field

The TPS56221DQPT is primarily designed for use in portable and stationary appliances and computing systems. It is suitable for single-voltage and multi-voltage applications, providing efficient and reliable power conversion from the input supply to regulated outputs. The device is designed to reduce input capacitance and output voltage ripple in portable applications, and it can provide low noise and high efficiency for a variety of DC/DC converter applications.

The device can be used to provide power to flat-panel displays, microcontrollers, digital signal processing (DSP) cores, systems-on-chip (SoC) and many other ICs. It can also be used to provide general point-of-load power in applications such as portable device, automotive, and industrial systems.

Working Principle

The TPS56221DQPT works on the principle of current-mode switching. The device is an integrated synchronous buck regulator, which uses a current-regulated feedback loop to provide fast, accurate output voltage regulation. The device can accurately control the output rise time, output settling time, and output ripple in the range of 10 mV–100 mV.

The device monitors and regulates the output current with a current-mode control loop. The current signal is amplified and compared with an internal reference to generate a control signal. The control signal, in turn, drives the synchronous MOSFET, controlling the output voltage. The output voltage is adjusted with an external resistor for fine-tuning.

The device also features a number of safety and protection functions. It includes over-voltage protection (OVP) and over-temperature protection (OTP) to protect the device and the load. Other features include a low-voltage lockout circuit, an adjustable soft-start ramp, and a sync pin to be used with an external clock signal.

The TPS56221DQPT is a highly effective solution for a wide variety of power conversion applications. Its combination of high efficiency, fast transient response, and low external component count make it an attractive option for many different types of designs.

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