TPS54061DRBR Detailed explanation of pin function specifications and circuit principle instructions
The part number "TPS54061DRBR" refers to a DC-DC buck converter manufactured by Texas Instruments (TI). It's a part of their Power Management IC (Integrated Circuit) family. This part is specifically designed to provide efficient power conversion from a higher DC voltage to a lower DC voltage.
TPS54061DRBR Pin Function and Packaging Specifications
The TPS54061DRBR is packaged in a QFN (Quad Flat No-lead) package with 20 pins. Here's a breakdown of the 20 pins with their detailed functions.
Pin Number Pin Name Function Description 1 VIN Input voltage pin. Connect to the input DC voltage source (typically between 3V and 60V). 2 EN (Enable) Enable pin. A logic-high signal turns on the device, while a logic-low disables it. 3 PGND (Power Ground) Ground reference for the power stage. 4 VOUT (Output Voltage) Feedback pin used for controlling the output voltage regulation. 5 SW (Switch) Switch node that connects to the inductor. 6 VIN (Input Voltage) Another input voltage pin to connect to the power supply. 7 COMP (Compensation) Compensation pin for the control loop. 8 VOSENSE (Voltage Sense) Used to sense the output voltage in relation to the feedback. 9 VREF ( Voltage Reference ) Voltage reference pin used for precise regulation. 10 SS (Soft Start) Soft-start pin, controls the ramp-up of the output voltage. 11 FB (Feedback) Feedback pin used for voltage regulation (connected to a voltage divider). 12 FBT (Feedback Top) Top part of the voltage divider to adjust feedback voltage. 13 FBL (Feedback Low) Bottom part of the voltage divider for feedback voltage adjustment. 14 ISEN+ (Current Sense +) Positive current sense input for overcurrent protection. 15 ISEN- (Current Sense -) Negative current sense input for overcurrent protection. 16 PG (Power Good) Power good indicator. A high signal indicates the output is in regulation. 17 SW (Switch) Another pin for the switching node. 18 VOUT (Output Voltage) Output voltage pin used for regulation feedback. 19 VSS (System Ground) Ground pin for the system (low side ground). 20 NC (No Connection) No internal connection. Typically used for mechanical stability in the package.Pinout and Usage Instructions
Pin 1 (VIN) and Pin 6 (VIN) are used to connect the input DC supply. Ensure that the input voltage stays within the device's recommended operating range, usually between 3V and 60V. Pin 2 (EN) is for enabling or disabling the device. This pin should be driven high for normal operation. If pulled low, the device enters a shutdown state. Pins 3, 19 (PGND, VSS) provide the necessary ground connections for the power and system grounds. Pin 4 (VOUT), Pin 18 (VOUT): These pins provide feedback to the controller to maintain a stable output voltage, typically used with a resistive divider. Pin 5, 17 (SW) connects to the inductor. The switching node should be connected to an inductor and capacitor for energy storage and smoothing. Pin 7 (COMP): This is used for loop compensation to maintain stable operation of the DC-DC converter. Pin 8 (VOSENSE): Connect this pin to the feedback loop to sense the voltage on the output side. Pin 9 (VREF) provides a precise reference voltage for feedback and regulation. Pin 10 (SS): This pin is for controlling the soft-start functionality to avoid inrush currents at startup. Pins 11-13 (FB, FBT, FBL): These pins are used to connect to a feedback resistor divider to set the desired output voltage. These should be connected as part of a voltage divider network. Pins 14 and 15 (ISEN+, ISEN-): These are used for current sensing. The device monitors the current to protect against overcurrent conditions. Pin 16 (PG): The Power Good pin provides an indication that the output voltage is within regulation limits. Pin 20 (NC): This pin is not internally connected but should be left floating or grounded.Frequently Asked Questions (FAQ) about TPS54061DRBR
Q: What is the input voltage range for the TPS54061DRBR? A: The input voltage range is 3V to 60V. Q: What is the typical output voltage of the TPS54061DRBR? A: The output voltage is programmable using external resistors for feedback. Q: How do I enable the TPS54061DRBR? A: You can enable the device by applying a logic-high signal to the EN (Enable) pin. Q: How do I disable the TPS54061DRBR? A: To disable the device, pull the EN (Enable) pin low. Q: What is the purpose of the COMP pin? A: The COMP pin is used for controlling the loop compensation to ensure stable operation of the feedback loop. Q: How do I adjust the output voltage of the TPS54061DRBR? A: The output voltage is adjustable by configuring a resistive voltage divider network between the FB, FBT, and FBL pins. Q: Can the TPS54061DRBR operate with a voltage as low as 3V? A: Yes, the device can operate with a minimum input voltage of 3V. Q: What is the function of the SW pins? A: The SW pins are used to connect the switching node to the inductor. This is where the energy is stored and then transferred to the output. Q: How do I connect the TPS54061DRBR to an inductor? A: The SW pins should be connected to the inductor, which will then be connected to the output capacitor and load.Q: What is the significance of the PG pin?
A: The PG pin indicates when the output voltage is within the required range, providing a signal for power-good status.Q: What type of soft-start mechanism does the TPS54061DRBR use?
A: The soft-start mechanism is controlled through the SS pin, which helps prevent inrush current when the device starts up.Q: Can I use the TPS54061DRBR without connecting the VOSENSE pin?
A: No, the VOSENSE pin is necessary for sensing the output voltage and ensuring proper regulation.Q: What should I do if the output voltage is not stable?
A: Check the feedback network and ensure that the COMP pin is properly compensated.Q: How do I protect against overcurrent conditions?
A: The device includes current sense pins (ISEN+ and ISEN-) that monitor the current and will protect against overcurrent situations.Q: What is the recommended PCB layout for the TPS54061DRBR?
A: Texas Instruments provides application notes with layout guidelines to optimize performance and thermal management. Refer to the datasheet for detailed layout recommendations.Q: How can I adjust the switching frequency of the TPS54061DRBR?
A: The switching frequency is set internally, but external components such as the inductor and capacitor can affect it.Q: How can I ensure stable operation with high output currents?
A: Use appropriate external capacitors and inductors and ensure the thermal design is adequate for high-current loads.Q: Can I use the TPS54061DRBR for point-of-load applications?
A: Yes, the device is suitable for point-of-load power conversion in various applications, including processors and FPGA power supplies.Q: What is the power-good signal used for?
A: The power-good signal (PG pin) informs the system when the output voltage is within regulation.Q: What is the maximum output current of the TPS54061DRBR?
A: The device can supply up to 6A of output current, depending on thermal conditions and component selection.This explanation covers the full pinout, their functions, and answers to 20 common questions.
