The part number "TPS7A9001DSKR" is from Texas Instruments. It is a low-noise, high-PSRR ( Power Supply Rejection Ratio), and high-precision voltage regulator. This part is designed for sensitive applications that require stable power and minimal noise. The model "TPS7A9001DSKR" belongs to the TPS7A90xx series of high-performance regulators.
Packaging Information:
The "TPS7A9001DSKR" comes in a SOT-23-5 package, which has 5 pins.
Pin Function Specifications:
Below is a detailed explanation of the pin functions for the "TPS7A9001DSKR" in the SOT-23-5 package:
Pin Number Pin Name Pin Function Description 1 IN Input Voltage Pin: This is the pin where the input voltage is applied. It should be connected to the positive supply voltage (within the range specified in the datasheet). 2 GND Ground Pin: This pin is the ground connection for the regulator. It should be connected to the system ground. 3 EN Enable Pin: This pin is used to enable or disable the regulator. When driven high (typically to a voltage of 1.2V or higher), the regulator is enabled. Driving this pin low disables the regulator. 4 OUT Output Voltage Pin: This is the regulated output voltage of the regulator. It is where the regulated voltage is supplied to the load. 5 NC No Connection Pin: This pin is not connected internally and does not serve a function. It is sometimes used to improve package layout or reduce parasitic capacitance.Pin Function Details:
IN Pin (Pin 1): This pin is for the input voltage, where the source voltage (within the recommended operating voltage range) is applied. It connects to the input of the regulator, providing the necessary voltage for regulation. Ensure that the input voltage is within the range specified in the datasheet to prevent damage to the IC and to ensure proper operation. GND Pin (Pin 2): The ground pin is used for the common return path for the input and output voltages. It should be connected to the system's ground. This is essential for proper voltage regulation and stability. EN Pin (Pin 3): The enable pin allows you to control whether the regulator is active or not. When the EN pin is low, the regulator is disabled, and the output voltage is turned off. When the EN pin is high, the regulator is enabled, and the output voltage becomes active. A logic high level is typically applied using a voltage higher than 1.2V, as per the datasheet's specification. OUT Pin (Pin 4): The output pin is where the regulated voltage is supplied. This is the key pin where the low-noise and precise output voltage will be delivered to the load. It must be connected to the device or circuit that requires the regulated voltage. Ensure proper filtering and decoupling capacitor s are used at the output to minimize noise and ensure stability. NC Pin (Pin 5): The NC (No Connection) pin is not internally connected to any part of the circuit inside the package. It does not have an electrical function and can be ignored in terms of the regulator's operation. It might be used to help with package integrity or parasitic effects in high-speed circuits.20 FAQ - Frequently Asked Questions for TPS7A9001DSKR:
Q: What is the input voltage range for the TPS7A9001DSKR? A: The input voltage range for the TPS7A9001DSKR is 1.5V to 6.5V, as per the datasheet.
Q: What is the output voltage for the TPS7A9001DSKR? A: The TPS7A9001DSKR is a 1.8V output voltage regulator with a low noise and high PSRR performance.
Q: Can I use the EN pin to completely disable the regulator? A: Yes, by pulling the EN pin low, you can disable the regulator, effectively turning off the output voltage.
Q: What type of capacitors should be used on the input and output? A: It is recommended to use ceramic capacitors with a value of 10µF on both the input and output for stability and performance.
Q: What is the typical dropout voltage for the TPS7A9001DSKR? A: The typical dropout voltage is 45mV at a load current of 100mA, making it very suitable for low-voltage applications.
Q: How much current can the TPS7A9001DSKR source? A: The TPS7A9001DSKR can provide up to 100mA of output current.
Q: Can the TPS7A9001DSKR be used for battery-powered applications? A: Yes, it is ideal for battery-powered applications due to its low dropout voltage and high efficiency.
Q: What is the output voltage noise for TPS7A9001DSKR? A: The TPS7A9001DSKR features a very low output noise, typically around 1.5µVRMS at 10Hz to 100kHz.
Q: Can I use the NC pin for any connection? A: No, the NC pin should not be used for any electrical connections. It is reserved for package optimization.
Q: Is the TPS7A9001DSKR thermally protected? A: Yes, it includes thermal shutdown protection to prevent overheating.
Q: Can I use the TPS7A9001DSKR to regulate a voltage lower than 1.8V? A: No, the output voltage is fixed at 1.8V. If you need different voltages, choose another regulator from the TPS7A90xx family.
Q: What is the quiescent current of the TPS7A9001DSKR? A: The typical quiescent current is 30µA, which makes it highly efficient for low-power applications.
Q: How should the EN pin be connected in a system where the regulator needs to be permanently enabled? A: The EN pin should be connected to a logic high voltage (greater than 1.2V) to keep the regulator always enabled.
Q: Is the TPS7A9001DSKR suitable for high-speed circuits? A: Yes, the TPS7A9001DSKR is designed to be low-noise and high-precision, making it suitable for high-speed, sensitive analog circuits.
Q: What is the recommended layout for the PCB when using TPS7A9001DSKR? A: The datasheet provides detailed recommendations for layout, including grounding techniques, placement of decoupling capacitors, and minimizing parasitic inductance.
Q: Does the TPS7A9001DSKR have overcurrent protection? A: Yes, it includes protection against overcurrent conditions to prevent damage to the device and the load.
Q: Can I connect a load directly to the output pin of TPS7A9001DSKR? A: Yes, you can connect a load directly to the output pin, but ensure the current demand does not exceed the maximum rated output current of 100mA.
Q: What is the thermal resistance of the TPS7A9001DSKR? A: The typical thermal resistance is 250°C/W for the SOT-23 package.
Q: What is the maximum output voltage variation for the TPS7A9001DSKR under load conditions? A: The output voltage variation is typically very low, with less than 0.1% variation under typical operating conditions.
Q: What should I do if the TPS7A9001DSKR is not functioning correctly? A: Check the input voltage, ensure the EN pin is properly configured, verify capacitor values, and ensure that the load current is within the device's capability.
This detailed breakdown covers the key pin functionality and FAQs for the TPS7A9001DSKR regulator from Texas Instruments. If you need further specifications or clarifications, feel free to ask!
