The "TPS7A7001DDAR" is a high-performance, low-dropout (LDO) regulator from Texas Instruments. It is a part of their TPS7A7001 series, which is designed for ultra-low noise applications, offering precision output voltage regulation with a very low dropout voltage. This specific part comes in a VQFN-16 package, which is a 16-pin package.
Detailed Pin Function Specifications and Circuit Principle Instructions for TPS7A7001DDAR:
Pin Function Description for 16 Pins: Pin Number Pin Name Pin Description 1 VIN Input Voltage Pin: This pin is where the input voltage (typically 4.5V to 40V) is supplied to the LDO regulator. 2 GND Ground Pin: The ground pin serves as the reference ground for the device. Connect this to the system ground. 3 VOUT Output Voltage Pin: This is the output voltage provided by the LDO regulator. The output voltage depends on the configured output and is available here. 4 NC No Connection: This pin is not internally connected to the device and can be left floating. 5 PGND Power Ground Pin: This pin is dedicated to the ground connection for the power stage. It is important to minimize noise and impedance in this pin. 6 EN Enable Pin: This pin is used to enable or disable the device. A logic low disables the regulator, while a logic high enables it. 7 VIN Input Voltage Pin (Connected Internally): Same as Pin 1. It is part of the input power path. 8 REF Reference Voltage Pin: This pin provides a reference voltage for the regulation of the output voltage. 9 VOUT Output Voltage Pin (Connected Internally): This pin is internally connected to the output regulation. 10 VOUT Output Voltage Pin: Similar to Pin 9, this pin outputs the regulated voltage. It is part of the feedback loop for the voltage regulation. 11 NC No Connection Pin: This is a pin that does not have any electrical function and is left unconnected. 12 EN Enable Pin: A second Enable pin used to manage the device’s on/off state. Can be used for power sequencing. 13 GND Ground Pin (Secondary): Another ground pin to reduce the distance for current flow back to the main ground. 14 PGND Power Ground Pin (Secondary): Another pin for minimizing impedance and noise for the power section of the device. 15 OUT Output Voltage Pin (Secondary): A second output pin that works with the main output pin to supply the regulated voltage. 16 VIN Input Voltage Pin (Secondary): An additional connection for the input voltage, used for power supply redundancy or flexibility in design.FAQ (Frequently Asked Questions)
Q: What is the recommended input voltage range for TPS7A7001DDAR? A: The recommended input voltage range for TPS7A7001DDAR is between 4.5V and 40V.
Q: How do I disable the TPS7A7001DDAR regulator? A: To disable the TPS7A7001DDAR regulator, apply a logic low (0V) to the EN (Enable) pin.
Q: Can the TPS7A7001DDAR be used for powering a sensitive analog circuit? A: Yes, TPS7A7001DDAR is designed for ultra-low noise applications and is ideal for powering sensitive analog circuits.
Q: What is the dropout voltage of TPS7A7001DDAR? A: The dropout voltage of the TPS7A7001DDAR is typically 40mV at 1A output current.
Q: What is the maximum output current that the TPS7A7001DDAR can supply? A: The maximum output current of the TPS7A7001DDAR is 1A.
Q: How do I enable the TPS7A7001DDAR? A: To enable the TPS7A7001DDAR, apply a logic high (3V to 5V) to the EN pin.
Q: Can I use the TPS7A7001DDAR to provide multiple output voltages? A: No, the TPS7A7001DDAR provides a single, regulated output voltage.
Q: What should I do if the output voltage of TPS7A7001DDAR is too high? A: Check the external feedback resistors that set the output voltage. Ensure they are within the correct values for the desired output.
Q: Does the TPS7A7001DDAR have thermal shutdown protection? A: Yes, the TPS7A7001DDAR includes thermal shutdown protection to prevent overheating.
Q: What is the typical noise performance of the TPS7A7001DDAR? A: The TPS7A7001DDAR offers a typical noise performance of less than 1µVRMS in the 10Hz to 100kHz bandwidth.
Q: Can I use the TPS7A7001DDAR in a high-frequency switching power supply? A: No, TPS7A7001DDAR is a linear regulator and is not designed for switching applications.
Q: How should I handle the ground pins in the TPS7A7001DDAR? A: It is important to connect both the GND and PGND pins to the system ground to minimize noise and ensure proper operation.
Q: What type of capacitor should I use on the output of the TPS7A7001DDAR? A: A low ESR ceramic capacitor is recommended for stable operation at the output.
Q: Can the TPS7A7001DDAR be used in automotive applications? A: Yes, TPS7A7001DDAR can be used in automotive applications due to its wide input voltage range and robust features.
Q: What is the efficiency of TPS7A7001DDAR? A: The efficiency of TPS7A7001DDAR is dependent on the input voltage and output current, but it is a linear regulator, so efficiency is typically low at higher input-output voltage differences.
Q: Does the TPS7A7001DDAR support external feedback for setting output voltage? A: Yes, the output voltage of the TPS7A7001DDAR is set by external feedback resistors.
Q: Can the TPS7A7001DDAR handle load transients? A: Yes, the TPS7A7001DDAR is designed to handle load transients and maintain stable output voltage.
Q: What is the maximum temperature rating of TPS7A7001DDAR? A: The maximum operating junction temperature of the TPS7A7001DDAR is 125°C.
Q: How should I connect the enable pin for correct functionality? A: The EN pin should be connected to a logic high voltage for enabling the regulator and a logic low voltage to disable it.
Q: What happens if the input voltage of TPS7A7001DDAR exceeds the recommended range? A: Exceeding the recommended input voltage range can damage the device and affect its performance.
