The model "TPS54519RTER" is from Texas Instruments, a well-known American company that specializes in semiconductor solutions.
Package Information:
The TPS54519RTER is housed in a VQFN-20 (Very Thin Quad Flat No-lead) package. This package type has 20 pins.
Pin Function List for TPS54519RTER (VQFN-20 Package):
Below is the complete pin function description for each of the 20 pins. Each pin is described in detail, listing its purpose and usage in the circuit:
Pin Number Pin Name Pin Function Description 1 VIN This is the input voltage pin. It is the Power supply input for the device. The voltage applied here must be within the specified range of the IC for proper operation. Typically used to supply the input voltage for the buck converter. 2 PGND Power ground pin. This pin provides the reference ground for the power section of the IC. Connect it to the system ground. 3 SW Switch node for the power converter. This is the switching node where the inductor connects. It is used to transfer the energy from the input to the output. 4 BOOT Boot strap pin. This pin connects to a bootstrap capacitor which is used to supply voltage to the internal high-side MOSFET. 5 COMP Compensation pin. This pin connects to a compensation network to control the loop dynamics of the system. Used for feedback regulation stability. 6 FB Feedback pin. This pin receives the output voltage feedback from the resistor divider network to regulate the output voltage. 7 SS/TRK Soft-start and tracking pin. It is used to set the soft-start period for the output voltage and can also be used for tracking another voltage. 8 EN Enable pin. This pin is used to enable or disable the output of the regulator. When a high voltage is applied, the IC is enabled. 9 PG Power good pin. This pin is used to indicate whether the output voltage is within the expected range. A low signal indicates a fault or out-of-range condition. 10 SYNC Synchronization pin. This pin is used to synchronize the internal clock of the IC with an external clock source to improve efficiency in multi-phase systems. 11 VDD Input voltage pin for the internal logic. It is connected to a clean 5V logic supply voltage. 12 VOUT Output voltage pin. This pin provides the regulated output voltage. 13 AGND Analog ground pin. Provides a reference ground for the analog circuitry in the IC. 14 ISEN- Negative current sense pin. It is used for current sensing to protect the device against overcurrent and to monitor the current flow. 15 ISEN+ Positive current sense pin. It is used to sense the current flowing through the inductor to enable current-mode control. 16 RT/CLK Resistor or clock input pin. Used to set the switching frequency by attaching an external resistor or can also be used to synchronize the clock with an external source. 17 PDRV Power drive pin. This pin is used to drive the external power MOSFETs , providing the necessary voltage to switch them. 18 NDRV Negative drive pin. This pin provides the negative voltage required to drive the external low-side MOSFET in a buck converter configuration. 19 PGND Power ground pin for the high-side power driver. It should be connected to the system ground plane. 20 VOUT Output voltage for the regulator, similar to Pin 12, this is the primary voltage output to the load.20 Frequently Asked Questions (FAQ):
Q: What is the input voltage range for the TPS54519RTER? A: The input voltage range for the TPS54519RTER is 4.5V to 60V.
Q: How do I enable or disable the TPS54519RTER? A: The TPS54519RTER can be enabled or disabled by applying a high or low voltage signal to the EN (pin 8). A voltage above 1.2V enables the device, while below 0.4V disables it.
Q: What is the maximum output current the TPS54519RTER can provide? A: The TPS54519RTER can supply up to 5A of continuous output current.
Q: How do I connect the feedback for output voltage regulation? A: The feedback pin (FB) is used for connecting an external voltage divider from the output to ground, which controls the output voltage.
Q: Can the TPS54519RTER be used in a 24V system? A: Yes, the TPS54519RTER can operate with input voltages up to 60V, making it suitable for 24V systems.
Q: What is the function of the SW pin? A: The SW pin is the switch node for the power converter, where the inductor is connected, and it switches between the input voltage and ground.
Q: What should be connected to the BOOT pin? A: A bootstrap capacitor should be connected to the BOOT pin to supply voltage to the internal high-side MOSFET.
Q: How does the Power Good (PG) pin work? A: The PG pin indicates whether the output voltage is within the regulated range. If the output is within the specified range, the PG pin outputs a high signal.
Q: How do I set the switching frequency of the TPS54519RTER? A: The switching frequency can be set by connecting a resistor to the RT/CLK pin. The frequency can also be synchronized with an external clock.
Q: What is the function of the ISEN pins? A: The ISEN+ and ISEN- pins are used for current sensing in the power converter. These pins help monitor the current flowing through the inductor for protection and control purposes.
Q: How is soft start configured? A: Soft start is configured through the SS/TRK pin, which controls the ramp-up time of the output voltage to reduce inrush current during startup.
Q: Can the TPS54519RTER be synchronized with other converters? A: Yes, the TPS54519RTER can synchronize with external clock sources via the SYNC pin, enabling phase synchronization with other converters in multi-phase applications.
Q: What is the purpose of the RT/CLK pin? A: The RT/CLK pin is used for setting the switching frequency through an external resistor or for synchronizing the clock with an external source.
Q: How do I handle overcurrent protection with this IC? A: Overcurrent protection is managed through the current sensing pins (ISEN+ and ISEN-), which monitor the inductor current to trigger the protection when necessary.
Q: Is there an external component needed for the feedback loop? A: Yes, external resistors are required to form a voltage divider for the feedback loop, controlling the output voltage.
Q: How do I ensure proper grounding in the design? A: Both PGND (pin 2) and AGND (pin 13) should be connected to the respective grounds. PGND should be tied to the power ground plane, and AGND should be connected to the analog ground.
Q: What are the main limitations of the TPS54519RTER? A: Limitations include the maximum input voltage of 60V, output current of 5A, and the need for proper external components for compensation and feedback.
Q: Can I use this IC for non-boost converter designs? A: Yes, the TPS54519RTER is a buck converter IC and is not limited to boost converter designs.
Q: What is the purpose of the PDRV and NDRV pins? A: PDRV drives the external high-side MOSFET, while NDRV drives the low-side MOSFET in a buck converter configuration.
Q: What type of capacitor should be used at the BOOT pin? A: A ceramic capacitor with a value of 0.1µF to 1µF is typically used at the BOOT pin to support the bootstrap function for the high-side MOSFET.