The "TPS7B7702QPWPRQ1" is a Low Dropout Regulator (LDO) produced by Texas Instruments. The "QPWPRQ1" part is a Q1 grade, which generally indicates that it is an automotive-qualified part, meaning it is designed for use in automotive environments where reliability is crucial.
Package
The TPS7B7702QPWPRQ1 comes in a QFN (Quad Flat No-lead) package, specifically the QFN-20 package, which means it has 20 pins.
Pin Function Description and Circuit Principles
The TPS7B7702QPWPRQ1 is designed to deliver stable and precise voltage regulation in Power -sensitive applications such as automotive electronics, industrial systems, and more.
Here is a detailed description of the 20 pins:
Pin Number Pin Name Pin Function Description 1 VOUT1 Output voltage 1. Connect the load that requires regulated voltage. 2 VOUT2 Output voltage 2. This is another regulated voltage output, typically with a different voltage level. 3 VIN Input voltage. The pin where the unregulated supply voltage is applied. 4 GND Ground. This is the reference pin for all voltages and should be connected to the system ground. 5 PGND Power Ground. Connect to the system power ground to minimize noise and improve regulator stability. 6 EN1 Enable control pin for output 1. Logic high turns on the voltage regulator for output 1. 7 EN2 Enable control pin for output 2. Logic high turns on the voltage regulator for output 2. 8 VINA Another version of the input voltage pin, often used for alternate or higher input voltages. 9 VOUT3 Output voltage 3. A third output regulated voltage for different system components. 10 NC No connection. This pin is not used in the operation of the device and can be left unconnected. 11 PGND Power Ground. Connect to system power ground to ensure optimal regulator pe RF ormance. 12 FB1 Feedback pin for output voltage 1. Used to set the output voltage by external resistor divider. 13 FB2 Feedback pin for output voltage 2. Similar to FB1 but for the second output voltage. 14 SENSE Sensing pin used for adjusting or compensating the output voltage for load and environmental changes. 15 PGOOD1 Power Good pin for output 1. Logic high indicates the regulator is outputting a valid voltage on VOUT1. 16 PGOOD2 Power Good pin for output 2. Logic high indicates the regulator is outputting a valid voltage on VOUT2. 17 COMP Compensation pin. Used for stabilizing the internal control loop and improving transient response. 18 TSHDN Thermal shutdown. When the temperature exceeds a safe operating limit, this pin will trigger a shutdown. 19 UVLO Undervoltage Lockout. This pin prevents the regulator from outputting voltage when the input voltage is too low. 20 NC No connection. As with pin 10, this pin is unused and can be left unconnected.Frequently Asked Questions (FAQ)
Here are the 20 frequently asked questions for the TPS7B7702QPWPRQ1:
What is the maximum input voltage for the TPS7B7702QPWPRQ1? The maximum input voltage is 40V, as specified in the datasheet.
How many outputs does the TPS7B7702QPWPRQ1 have? It has 3 output voltages: VOUT1, VOUT2, and VOUT3.
What type of package is the TPS7B7702QPWPRQ1 available in? The device is available in a QFN-20 package.
What is the recommended input voltage range for the TPS7B7702QPWPRQ1? The recommended input voltage range is 4.5V to 40V.
How does the enable pin work for the TPS7B7702QPWPRQ1? The EN1 and EN2 pins control the activation of outputs VOUT1 and VOUT2, respectively. Logic high enables the output.
What is the role of the feedback pins (FB1 and FB2)? The FB1 and FB2 pins are used to adjust the output voltages by connecting external resistors for setting the desired output.
Is thermal shutdown available in the TPS7B7702QPWPRQ1? Yes, the device features a thermal shutdown (TSHDN) to protect it from overheating.
How do I use the Power Good pins (PGOOD1 and PGOOD2)? PGOOD1 and PGOOD2 provide a logic high when the corresponding output voltages (VOUT1 and VOUT2) are within the specified tolerance.
What is the typical output voltage for VOUT1? The output voltage for VOUT1 is configurable, typically ranging from 1.0V to 5.5V depending on the external feedback components.
What is the compensation pin used for in the TPS7B7702QPWPRQ1? The COMP pin is used to stabilize the regulator’s internal feedback loop and to improve the transient response.
Can I use the TPS7B7702QPWPRQ1 in automotive applications? Yes, the device is automotive-qualified (Q1 grade), making it suitable for automotive applications requiring high reliability.
What happens when the input voltage is too low? If the input voltage falls below the undervoltage lockout (UVLO) threshold, the regulator will shut down to protect the system.
How does the TPS7B7702QPWPRQ1 handle overcurrent protection? The device includes current limiting and thermal shutdown to prevent damage due to excessive current or overheating.
Can the device be used in low-noise applications? Yes, the TPS7B7702QPWPRQ1 is designed for low-noise performance, making it suitable for sensitive analog or RF circuits.
What is the current output capability of each voltage output? Each output can provide up to 2A, depending on the specific output and the thermal conditions.
How do I configure the output voltages? The output voltages are configured by selecting external feedback resistors connected to the FB1, FB2, and FB3 pins.
What are the benefits of the TPS7B7702QPWPRQ1’s low dropout feature? The low dropout feature ensures stable operation even with a small difference between the input and output voltage.
What should I do if I don’t need one of the outputs (e.g., VOUT3)? If you don't need VOUT3, you can leave it unconnected or ground it, but ensure it doesn’t interfere with other parts of the system.
Does the TPS7B7702QPWPRQ1 support external capacitor s for stability? Yes, external capacitors are recommended to ensure proper output stability. Follow the recommended capacitor values in the datasheet.
What is the purpose of the SENSE pin? The SENSE pin is used to monitor the output voltage, and it helps the device maintain output voltage regulation under varying load conditions.
Conclusion
This detailed guide of the TPS7B7702QPWPRQ1 provides a thorough description of its pin functions, FAQs, and application considerations. The 20-pin QFN package offers a versatile and reliable solution for various power regulation applications.
