Overview
The TPS7A8400ARGRT is a high-accuracy, low-noise, ultra-low-dropout linear voltage regulator (LDO) from Texas Instruments. This device is designed to source up to 3 A of current with a maximum dropout voltage of 180 mV at 3 A when using the BIAS pin. It is available in two variants: TPS7A8400A and TPS7A8401A, each offering different output voltage ranges. The regulator is ideal for applications requiring high accuracy, low noise, and stable output performance, such as precision instrumentation, data acquisition systems, and high-speed communications.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 1.1 V to 6.5 V (with BIAS), 1.4 V to 6.5 V (without BIAS) |
| Output Voltage Range | TPS7A8400A: 0.8 V to 3.95 V (ANY-OUT), 0.8 V to 5.15 V (adjustable) TPS7A8401A: 0.5 V to 2.075 V (ANY-OUT), 0.5 V to 5.15 V (adjustable) |
| Maximum Output Current | 3 A |
| Dropout Voltage (typ) | 110 mV @ 3 A |
| Noise (µVrms) | 4.4 µVrms |
| Power Supply Ripple Rejection (PSRR) | 40 dB at 500 kHz |
| Accuracy | 0.75% over line, load, and temperature |
| Operating Temperature Range | -40°C to 125°C |
| Package | 20-pin VQFN |
Key Features
- High-Accuracy Voltage Regulation: Offers high accuracy and precision, ensuring stable output performance with a maximum accuracy of 0.75% over line, load, and temperature.
- Low-Noise Operation: Designed to minimize noise and ripple in the output voltage, with an output voltage noise of 4.4 µVrms.
- Ultra-Low Dropout Voltage: Maximum dropout voltage of 180 mV at 3 A when using the BIAS pin.
- Adjustable Output Voltage: Output voltage is adjustable using an external resistor divider, with pin-programmable options available.
- High PSRR: Power supply ripple rejection of 40 dB at 500 kHz.
- Excellent Load Transient Response: Ensures stable output voltage under varying load conditions.
- Adjustable Soft-Start In-Rush Control: Helps in managing the inrush current during startup.
- Open-Drain Power-Good (PG) Output: Provides a signal indicating the status of the output voltage.
- Protection Features: Includes overcurrent, overtemperature, and undervoltage lockout (UVLO) protection.
Applications
- Macro Remote Radio Units (RRU): Suitable for high-speed communications and radio frequency applications.
- Outdoor Backhaul Units: Used in wireless communication systems requiring stable and low-noise power supplies.
- Active Antenna System (AAS) mMIMO: Ideal for advanced antenna systems in 5G and other wireless technologies.
- Ultrasound Scanners: Used in medical imaging equipment that requires high accuracy and low noise.
- Lab and Field Instrumentation: Suitable for precision measurement and data acquisition systems.
- Sensor, Imaging, and Radar Systems: Used in various industrial and defense applications requiring stable and accurate power supplies.
- Data Acquisition Systems: Ideal for systems that require high accuracy, low noise, and stable output performance.
- Precision Instrumentation: Used in applications such as aerospace, defense, and industrial automation.
Q & A
- Q: What is the input voltage range of the TPS7A8400ARGRT? A: The input voltage range is from 1.1 V to 6.5 V with BIAS, and from 1.4 V to 6.5 V without BIAS.
- Q: What is the maximum output current of the TPS7A8400ARGRT? A: The maximum output current is 3 A.
- Q: What is the typical dropout voltage of the TPS7A8400ARGRT? A: The typical dropout voltage is 110 mV at 3 A.
- Q: What is the noise level of the TPS7A8400ARGRT? A: The output voltage noise is 4.4 µVrms.
- Q: What is the power supply ripple rejection (PSRR) of the TPS7A8400ARGRT? A: The PSRR is 40 dB at 500 kHz.
- Q: What is the accuracy of the TPS7A8400ARGRT over line, load, and temperature? A: The accuracy is 0.75%.
- Q: What is the operating temperature range of the TPS7A8400ARGRT? A: The operating temperature range is -40°C to 125°C.
- Q: What package type is the TPS7A8400ARGRT available in? A: It is available in a 20-pin VQFN package.
- Q: Does the TPS7A8400ARGRT have any protection features? A: Yes, it includes overcurrent, overtemperature, and undervoltage lockout (UVLO) protection.
- Q: Is the TPS7A8400ARGRT suitable for aerospace and defense applications? A: Yes, it is designed to meet the requirements of aerospace and defense applications that require high accuracy, low noise, and stable output performance.
