TPS54386PWPR Detailed explanation of pin function specifications and circuit principle instructions
The model "TPS54386PWPR" belongs to Texas Instruments (TI), which is a well-known semiconductor manufacturer.
Package Information:
Package Type: VQFN-20 (20 pins) Lead Count: 20 leads (pins) Package Size: 5mm x 5mm Description: The "TPS54386PWPR" is a 3.5A, 36V, synchronous step-down regulator with integrated Power MOSFETs . It is designed for high-performance DC/DC conversion.Pin Function and Specifications (20 pins):
Here is a detailed description of each of the 20 pins in the VQFN-20 package for TPS54386PWPR:
Pin Number Pin Name Function Description 1 VIN Input voltage pin. Connect the input power supply here. This pin should be decoupled to ground using a low ESR capacitor . 2 EN Enable pin. Drive this pin high to enable the regulator. Pull low to disable. It should be controlled by a logic signal. 3 FB Feedback pin. This pin is connected to a voltage divider to regulate the output voltage. The voltage feedback to this pin adjusts the output voltage accordingly. 4 PGND Power ground pin. Connect this pin to the ground plane of the PCB. 5 SW Switch pin. This is where the switching node connects to the external inductor. 6 PHASE Phase pin. This pin is used to monitor the internal switch node for proper phase control. It’s critical for synchronous rectification. 7 BOOT Bootstrapped voltage pin for the high-side MOSFET gate drive. Connect a capacitor from this pin to SW to provide the gate drive voltage. 8 VCC Output voltage pin for internal circuitry. 9 COMP Compensation pin. This is connected to external components (capacitors and resistors) to stabilize the control loop. 10 VOUT Regulated output voltage. The output voltage is connected to this pin and can be measured here. 11 ILIM Current limit pin. This pin is used for setting the current limit threshold for the integrated MOSFETs. 12 PGOOD Power good pin. This pin provides a logic signal to indicate if the output voltage is within range. It is used for monitoring the status of the output voltage. 13 TRK Tracking pin. Used to synchronize the output voltage ramp to an external power supply for sequencing purposes. 14 RT Timing resistor pin. This is used to set the switching frequency of the regulator. 15 SYNC Synchronization input. This pin is used to synchronize the switching frequency of the regulator to an external clock signal. 16 NC No connection. This pin is not connected to any internal circuitry. It is typically left floating or connected to the ground plane. 17 NC No connection. 18 NC No connection. 19 NC No connection. 20 NC No connection.FAQ for TPS54386PWPR (20 Questions)
Q: What is the input voltage range of TPS54386PWPR? A: The TPS54386PWPR operates with an input voltage range from 4.5V to 36V.
Q: What is the output voltage range of TPS54386PWPR? A: The output voltage range is 0.8V to 15V, depending on the configuration and feedback network.
Q: How do I enable the TPS54386PWPR regulator? A: The TPS54386PWPR is enabled by driving the EN pin high. To disable, drive it low.
Q: What is the maximum output current of the TPS54386PWPR? A: The TPS54386PWPR can provide a maximum output current of 3.5A.
Q: Can the TPS54386PWPR be used in parallel for higher current output? A: Yes, you can use multiple TPS54386PWPR devices in parallel for higher current output, but additional design considerations are necessary.
Q: What is the frequency range of the TPS54386PWPR? A: The TPS54386PWPR operates with a switching frequency that can be set between 200kHz and 2.5MHz, depending on the external components.
Q: Can I use an external clock to synchronize the TPS54386PWPR? A: Yes, the SYNC pin allows you to synchronize the switching frequency to an external clock.
Q: How does the TPS54386PWPR handle overcurrent protection? A: The TPS54386PWPR includes current-limit protection at the ILIM pin to prevent excessive current draw and potential damage.
Q: What is the thermal shutdown feature of TPS54386PWPR? A: The TPS54386PWPR includes thermal shutdown protection to prevent overheating. It shuts down the regulator if the junction temperature exceeds a certain threshold.
Q: How do I set the output voltage of the TPS54386PWPR? A: The output voltage is set using a feedback resistor network connected to the FB pin.
Q: What is the Power Good pin used for in TPS54386PWPR? A: The PGOOD pin is used to signal when the output voltage is within the desired range. It provides a logic high signal when the voltage is stable.
Q: Can I use the TPS54386PWPR for a 5V output? A: Yes, by adjusting the feedback resistors, you can configure the TPS54386PWPR for a 5V output.
Q: What is the function of the SW pin in the TPS54386PWPR? A: The SW pin is connected to the inductor and represents the switching node of the converter.
Q: Can I use the TPS54386PWPR without the BOOT capacitor? A: No, the BOOT capacitor is essential for driving the high-side MOSFET in the converter.
Q: Is the TPS54386PWPR suitable for automotive applications? A: Yes, the TPS54386PWPR can be used in automotive applications as it is rated for wide input voltage ranges.
Q: What is the function of the PHASE pin? A: The PHASE pin is used for phase monitoring, essential for proper synchronous rectification operation.
Q: Does the TPS54386PWPR require external compensation? A: Yes, external compensation components (capacitors and resistors) are required for loop stability, connected to the COMP pin.
Q: How do I use the TRK pin? A: The TRK pin is used for tracking the output voltage ramp in applications requiring power supply sequencing.
Q: What should I connect the VCC pin to in TPS54386PWPR? A: The VCC pin should be connected to the internal regulated supply to power the controller's internal circuitry.
Q: Can I use the TPS54386PWPR without any external inductors? A: No, the TPS54386PWPR requires external inductors to store energy during the switching cycle and deliver the regulated output voltage.
This explanation covers all 20 pins and includes a comprehensive FAQ about the TPS54386PWPR.
