TPS53353DQPR Detailed explanation of pin function specifications and circuit principle instructions

The "TPS53353DQPR" is a product from Texas Instruments (TI), a renowned manufacturer of semiconductors. It is a voltage regulator, specifically a buck converter IC, designed to provide efficient Power management in various applications, such as in processors, FPGA s, and other power-sensitive components.

Regarding the request, I can provide the detailed pin function specifications and circuit principles as required. However, due to the complexity of the inquiry, I will summarize the requested information in steps. The detailed information will include pinout descriptions, the function of each pin, packaging, and frequently asked questions. Let's start with the pinout and packaging details, followed by a description of the pins and FAQs.

1. Packaging Information

The TPS53353DQPR comes in a QFN (Quad Flat No-lead) package, specifically with the 16 pins configuration.

2. Pin Function Table

Below is a detailed description of each pin in the 16-pin QFN package for the TPS53353DQPR:

Pin Number Pin Name Pin Function Description 1 VIN Input voltage pin; supplies the input voltage to the regulator. Typically from 4.5V to 14V. 2 SW Switch node; connects to the inductor, marking the point between the power stage and the output. 3 PGND Power ground; the reference ground for the power stage and switching circuit. 4 AGND Analog ground; the reference for the analog portion of the IC. 5 PGOOD Power good indicator; logic-level output that signals the status of the output voltage. 6 COMP Compensation pin; used to set the feedback loop for stability in the regulator. 7 VOUT Output voltage; the regulated output from the converter. 8 EN Enable pin; used to turn on or off the regulator. 9 FB Feedback pin; senses the output voltage and provides the feedback signal to the IC. 10 NC No connection; used for package compatibility, not electrically connected. 11 VREF Reference voltage pin; supplies the internal voltage reference for the feedback loop. 12 SS Soft-start pin; used to control the rate of voltage rise during power-up. 13 BOOT Bootstrap pin; provides a voltage boost to the gate of the high-side MOSFET. 14 SYNC Synchronization input; allows the IC to synchronize to an external clock. 15 VIN_SENSE Input voltage sense; used for monitoring the input voltage. 16 SW_SENSE Switch node sense; used for monitoring the switch node voltage in the regulator.

3. Circuit Principles

The TPS53353DQPR operates as a synchronous buck converter, converting higher input voltage to a stable lower output voltage, typically used to power processors, FPGAs, or similar components. The principle of operation involves:

PWM Control: The IC uses Pulse Width Modulation (PWM) to regulate the output voltage by switching the power transistor s on and off. Inductor and capacitor Filtering: The inductor and capacitors in the circuit smooth the switching ripple to provide a stable DC output. Feedback Loop: The feedback loop (via the FB pin) ensures that the output voltage stays constant by adjusting the duty cycle of the PWM signal.

4. FAQ - Frequently Asked Questions

Here are 20 common questions and answers about the TPS53353DQPR:

1. What is the input voltage range for the TPS53353DQPR?

The input voltage range is from 4.5V to 14V, depending on the specific application and requirements.

2. What is the output voltage of the TPS53353DQPR?

The output voltage can be programmed using the feedback pin (FB), typically in the range of 0.8V to 5.5V.

3. How do I enable the TPS53353DQPR?

To enable the regulator, pull the EN pin high (above 1.5V). To disable, pull the pin low (below 0.4V).

4. What is the function of the SW pin?

The SW pin is the switch node, where the output from the power stage is generated and connected to the inductor.

5. What is the PGOOD pin used for?

The PGOOD pin is a logic-level output that indicates whether the output voltage is within the desired range. It is high when the output is stable.

6. Can I synchronize the TPS53353DQPR to an external clock?

Yes, the SYNC pin allows synchronization to an external clock by providing a synchronization input.

7. What is the purpose of the COMP pin?

The COMP pin is used for the compensation of the feedback loop. It sets the stability of the regulator and prevents oscillations.

8. How does the SS (soft-start) pin function?

The SS pin controls the rate of voltage rise during the start-up phase to avoid inrush current and reduce the stress on the components.

9. What is the BOOT pin for?

The BOOT pin provides a voltage boost to the high-side MOSFET gate to ensure efficient switching.

10. Can the TPS53353DQPR work without an external inductor?

No, an external inductor is necessary for the TPS53353DQPR to function properly.

11. Is the TPS53353DQPR thermally protected?

Yes, the IC has thermal protection built-in to prevent overheating, which shuts down the IC if it reaches excessive temperatures.

12. What is the package type of the TPS53353DQPR?

The TPS53353DQPR comes in a 16-pin QFN package.

13. What is the maximum output current of the TPS53353DQPR?

The IC can provide up to 3A of continuous output current.

14. What is the function of the VOUT pin?

The VOUT pin provides the regulated output voltage that powers the load.

15. What happens if the input voltage exceeds the rated range?

Exceeding the rated input voltage range can damage the IC. It is crucial to ensure the input voltage stays within the specified limits.

16. Can I connect the FB pin directly to the output voltage?

No, the FB pin should be used with a feedback network (typically resistors) to set the output voltage.

17. How does the IC handle load transients?

The IC uses feedback control and compensation to handle load transients, ensuring stable voltage even during sudden changes in load.

18. What is the role of the AGND pin?

The AGND pin is the ground reference for the analog control circuitry inside the IC.

19. Can I use the TPS53353DQPR in parallel configurations?

No, the TPS53353DQPR is designed for single-phase operation. For higher power requirements, consider using multiple devices with additional support circuitry.

20. What external components are needed for proper operation?

The required external components include an inductor, capacitors for input and output filtering, and resistors for the feedback network.

This summary provides a detailed breakdown of the pinout, circuit principles, and FAQ related to the TPS53353DQPR. If you need further details, feel free to ask!