The "TPS7B6933QDCYRQ1" is a Power management IC (PMIC) manufactured by Texas Instruments. It belongs to the "TPS7B69xx" family, which includes low-dropout regulators (LDOs) designed for high-precision, low-noise applications. The specific part number "TPS7B6933QDCYRQ1" is typically used in sensitive circuits where low noise and precise voltage regulation are crucial.
This part number refers to a specific model that comes in a particular packaging and configuration. Let’s break down its pinout and detailed specifications.
Packaging
The TPS7B6933QDCYRQ1 is packaged in a QFN-36 (Quad Flat No-leads) package. This package type is often used for ICs that require a small footprint with excellent thermal dissipation properties. QFN-36 refers to the package having 36 pins.Pinout & Pin Function Specifications (QFN-36 Package)
Below is a detailed list of the pin functions for the TPS7B6933QDCYRQ1, and each of the 36 pins:
Pin Number Pin Name Pin Function Description 1 GND Ground pin, reference voltage 2 VOUT Output voltage pin, provides the regulated voltage 3 VIN Input voltage pin, provides input power 4 EN Enable pin, used to enable/disable the regulator 5 FB Feedback pin, used for voltage regulation control 6 NC No Connection, not used internally 7 NC No Connection, not used internally 8 PG Power good pin, indicates the output is within range 9 SS Soft-start pin, used to control the startup time 10 PGOOD Power Good, output that indicates if the output is within the acceptable range 11 NC No Connection, not used internally 12 OUT_VREF Output reference voltage for internal regulation 13 NC No Connection, not used internally 14 VOUT_SENSE Sensing pin for output voltage monitoring 15 NC No Connection, not used internally 16 NC No Connection, not used internally 17 GND Ground pin 18 VOUT Output voltage pin, regulated voltage out 19 VIN Input power voltage pin 20 FB Feedback pin, used for voltage feedback and regulation 21 NC No Connection, not used internally 22 EN Enable pin, controls power-on/off 23 GND Ground pin 24 VOUT Output voltage pin, delivers the regulated voltage 25 NC No Connection, not used internally 26 NC No Connection, not used internally 27 NC No Connection, not used internally 28 PG Power Good, indicates output voltage status 29 VOUT_SENSE Output voltage sensing pin 30 VIN Input voltage pin 31 SS Soft-start pin, controls the ramp-up time of output voltage 32 PGOOD Power good signal output 33 GND Ground pin 34 VOUT Output voltage pin 35 VIN Input voltage pin 36 FB Feedback pin, voltage regulation controlPin Function FAQ (20 Common Questions)
Q1: What is the function of the "VOUT" pin on the TPS7B6933QDCYRQ1? A1: The "VOUT" pin provides the regulated output voltage, ensuring that the connected circuit receives a stable voltage from the regulator.
Q2: How do I enable the TPS7B6933QDCYRQ1? A2: The "EN" pin controls the enable function. Driving this pin high enables the output, while pulling it low disables the regulator.
Q3: What does the "PG" pin represent on the TPS7B6933QDCYRQ1? A3: The "PG" pin is a Power Good indicator. It signals when the output voltage is within the acceptable range for operation.
Q4: What is the "FB" pin used for? A4: The "FB" (feedback) pin is used to regulate the output voltage by comparing it with a reference voltage to maintain precise voltage output.
Q5: Can I connect the "GND" pins to any ground point? A5: Yes, all "GND" pins should be connected to the system's ground to provide a reference point for the device’s operation.
Q6: What is the role of the "SS" pin? A6: The "SS" (soft-start) pin controls the rate of voltage rise at the output, minimizing inrush current and reducing voltage overshoot.
Q7: What is the function of the "VOUTSENSE" pin? A7: The "VOUTSENSE" pin is used for monitoring the output voltage to ensure it stays within the required range for optimal operation.
Q8: How do I use the "PGOOD" pin? A8: The "PGOOD" pin signals when the output voltage is stable and within specification, helping the system monitor its status.
Q9: Is it necessary to use the "NC" pins? A9: No, the "NC" (No Connection) pins are not used internally and do not require any connections in your application.
Q10: How do I connect the "VIN" pin? A10: The "VIN" pin is where you connect the input power supply to provide voltage to the regulator.
Q11: What is the typical application for the TPS7B6933QDCYRQ1? A11: It is typically used in sensitive analog circuits, high-precision applications, and noise-sensitive environments like RF or mixed-signal systems.
Q12: Can I use the "EN" pin for remote power control? A12: Yes, you can use the "EN" pin for remote control of the power by driving it through an external logic signal.
Q13: Is there a way to delay the output voltage rise? A13: Yes, using the "SS" (soft-start) pin can delay the voltage rise to reduce inrush current at startup.
Q14: What happens if the "PG" pin goes low? A14: If the "PG" pin goes low, it means the output voltage is not within the required range, indicating a fault condition.
Q15: What is the recommended operating voltage for the "VIN" pin? A15: The "VIN" pin should be within the specified input voltage range as defined in the datasheet for the TPS7B6933QDCYRQ1.
Q16: Can I use the "FB" pin to adjust the output voltage? A16: Yes, adjusting the feedback resistance at the "FB" pin can be used to change the output voltage according to your requirements.
Q17: How precise is the output voltage? A17: The TPS7B6933QDCYRQ1 is designed for high-precision applications with very low output voltage ripple, ensuring stable voltage regulation.
Q18: Is there thermal protection in the TPS7B6933QDCYRQ1? A18: Yes, the device includes built-in thermal shutdown to protect against overheating and damage under extreme conditions.
Q19: What is the role of the "VOUT" and "VOUTSENSE" pins? A19: "VOUT" is the regulated output voltage pin, while "VOUTSENSE" is used for output voltage sensing, providing feedback for regulation.
Q20: How should I layout the PCB for optimal performance of the TPS7B6933QDCYRQ1? A20: Ensure that the input and output traces are kept short, and the "GND" pins have a low-impedance connection to the system ground. Proper thermal management and decoupling capacitor s near the "VIN" and "VOUT" pins are crucial.
The explanation and FAQ above provide a comprehensive view of the TPS7B6933QDCYRQ1's pin functions and common inquiries about the device's usage and application.