TPS7A8001DRBR Detailed explanation of pin function specifications and circuit principle instructions

The model "TPS7A8001DRBR" is from Texas Instruments (TI), which is a well-known American company that designs and manufactures semiconductors and various electronic components.

The "TPS7A8001DRBR" belongs to the TPS7A8001 series, which is a low-noise, high-precision voltage regulator. It is widely used for high-performance applications where low noise and high accuracy are crucial, such as in precision instrumentation, communication equipment, and audio systems.

Package Information and Pinout

Package Type:

DRB (VQFN-20): This is a 20-pin, Very Thin Quad Flat Package (VQFN), also known as a QFN-20 package. The "DRB" designation refers to the specific variant of this package.

Pinout Overview:

The TPS7A8001 features a 20-pin VQFN package (size: 4x4 mm), with each pin serving specific functions. Below is a detailed explanation of each pin function.

Pin Number Pin Name Pin Type Pin Function Description 1 VOUT Output The regulated output voltage. The TPS7A8001 provides a low-noise, low-dropout output. 2 PGND Ground Power ground. Used for low-side return path for current. 3 PGND Ground Power ground. Used for low-side return path for current. 4 EN Input Control Enable pin. Active high to enable the device and low to disable it. 5 IN Input Input voltage. Connect to the positive supply voltage for the regulator to operate. 6 IN Input Input voltage. Connect to the positive supply voltage for the regulator to operate. 7 VOUT Output The regulated output voltage. The TPS7A8001 provides a low-noise, low-dropout output. 8 VOUT Output The regulated output voltage. The TPS7A8001 provides a low-noise, low-dropout output. 9 NC No Connect No connection pin. Leave it floating or connect it to ground. 10 NC No Connect No connection pin. Leave it floating or connect it to ground. 11 PGND Ground Power ground. Used for low-side return path for current. 12 PGND Ground Power ground. Used for low-side return path for current. 13 PGND Ground Power ground. Used for low-side return path for current. 14 VOUT Output The regulated output voltage. The TPS7A8001 provides a low-noise, low-dropout output. 15 VOUT Output The regulated output voltage. The TPS7A8001 provides a low-noise, low-dropout output. 16 VIN Input Input voltage. Connect to the positive supply voltage for the regulator to operate. 17 VIN Input Input voltage. Connect to the positive supply voltage for the regulator to operate. 18 EN Input Control Enable pin. Active high to enable the device and low to disable it. 19 NC No Connect No connection pin. Leave it floating or connect it to ground. 20 NC No Connect No connection pin. Leave it floating or connect it to ground.

Pin Function Descriptions:

VOUT (Pin 1, 7, 8, 14, 15): The output voltage of the regulator is supplied here. This pin provides the regulated voltage based on the input voltage and internal regulation settings.

PGND (Pins 2, 3, 11, 12, 13): These are the power ground pins. They provide a low-side return path for current and must be connected to the system ground to ensure proper operation.

EN (Pin 4, 18): This is the enable control pin. When this pin is pulled high, the TPS7A8001 is enabled and begins regulating. If pulled low, the device is disabled, and the output voltage goes to 0V.

IN (Pins 5, 6, 16, 17): The input voltage is provided to these pins. They must be connected to a stable voltage source that is higher than the desired output voltage for proper regulation.

NC (Pins 9, 10, 19, 20): These are no connection pins. These pins do not have any internal connection and can be left floating or connected to ground.

FAQ (Frequently Asked Questions)

Q: What is the input voltage range for the TPS7A8001? A: The TPS7A8001 accepts input voltages between 3V and 40V.

Q: Can I use the TPS7A8001 with a 5V input? A: Yes, the TPS7A8001 can operate with a 5V input and provide low-noise output voltage.

Q: How do I enable the TPS7A8001? A: To enable the TPS7A8001, pull the EN pin (Pin 4 or Pin 18) high.

Q: What happens if I leave the EN pin floating? A: If the EN pin is left floating, the device may not work reliably. It is recommended to pull it high for proper operation.

Q: How much output current can the TPS7A8001 supply? A: The TPS7A8001 can supply up to 1A of output current under normal operating conditions.

Q: What is the typical dropout voltage of the TPS7A8001? A: The typical dropout voltage of the TPS7A8001 is 40mV at 1A load current.

Q: Can I use the TPS7A8001 in low-noise applications? A: Yes, the TPS7A8001 is designed for low-noise applications, making it ideal for sensitive analog circuits.

Q: What is the thermal shutdown temperature of the TPS7A8001? A: The thermal shutdown temperature is typically 160°C.

Q: How should I connect the PGND pins? A: Connect all the PGND pins (Pins 2, 3, 11, 12, and 13) directly to the system ground to ensure proper operation.

Q: Is the TPS7A8001 adjustable? A: No, the TPS7A8001 provides a fixed output voltage, but the output voltage options vary based on the specific version of the device.

Q: Can I use the TPS7A8001 to generate multiple output voltages? A: No, the TPS7A8001 provides a single, fixed output voltage, and it cannot be adjusted for multiple outputs.

Q: What is the maximum output voltage of the TPS7A8001? A: The maximum output voltage of the TPS7A8001 depends on the specific version and input voltage but can be up to 40V.

Q: Does the TPS7A8001 support external capacitor s? A: Yes, the TPS7A8001 requires external capacitors for stable operation. Recommended values are provided in the datasheet.

Q: Can I use the TPS7A8001 in automotive applications? A: Yes, the TPS7A8001 is suitable for automotive applications due to its wide input voltage range and low dropout voltage.

Q: What is the maximum power dissipation of the TPS7A8001? A: The maximum power dissipation depends on the input-output voltage difference and the output current, but the device is designed for low thermal dissipation.

Q: Is the TPS7A8001 RoHS compliant? A: Yes, the TPS7A8001 is RoHS compliant and is free from hazardous substances.

Q: Can the TPS7A8001 work with a 3.3V input? A: Yes, the TPS7A8001 can work with a 3.3V input if the output voltage is suitable for your application.

Q: What is the typical quiescent current for the TPS7A8001? A: The typical quiescent current is less than 50µA, making it ideal for low-power applications.

Q: How do I calculate the output voltage ripple of the TPS7A8001? A: The output voltage ripple depends on input voltage, load current, and external capacitors. Refer to the datasheet for detailed equations.

Q: What is the recommended PCB layout for the TPS7A8001? A: It is recommended to follow the layout guidelines in the datasheet to minimize noise and ensure stable operation. Proper grounding and decoupling are critical.

This is a detailed explanation of the TPS7A8001DRBR, with a thorough pinout table and a list of frequently asked questions. Let me know if you need more information or specific details!