Overview
The TPS7A8400ARGRR is a high-performance, low-dropout linear regulator (LDO) from Texas Instruments. This device is part of the TPS7A84A family and is designed to source up to 3 A of output current with a maximum dropout voltage of 180 mV. It offers high accuracy and low noise, making it ideal for powering noise-sensitive components in various applications.
The TPS7A8400ARGRR is available in a 20-pin VQFN package and features adjustable and pin-programmable output voltage settings. The device supports a wide input voltage range and provides excellent power-supply ripple rejection and load transient response.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage Range (VIN) | 1.1 | - | 6.5 | V |
| Bias Supply Voltage Range (VBIAS) | 3.0 | - | 6.5 | V |
| Output Voltage Range (VOUT) | 0.8 | - | 5.15 | V |
| Output Current (IOUT) | 0 | - | 3 | A |
| Dropout Voltage (VDO) | - | - | 180 mV | mV |
| Output Voltage Accuracy | -1.25% | - | 1.25% | % |
| Power-Supply Ripple Rejection (PSRR) at 500 kHz | 40 | - | - | dB |
| Output Voltage Noise | - | - | 4.4 µVRMS | µVRMS |
| Operating Junction Temperature (TJ) | -40 | - | 125 | °C |
| Package Type | - | - | VQFN (20-pin) | - |
Key Features
- Low dropout voltage: 180 mV maximum at 3 A with BIAS.
- High accuracy: 0.75% maximum over line, load, and temperature with BIAS.
- Low noise: 4.4 µVRMS output voltage noise.
- Adjustable and pin-programmable output voltage settings:
- TPS7A8400A: 0.8 V to 3.95 V with 50-mV resolution, and 0.8 V to 5.15 V using an external resistor divider.
- TPS7A8401A: 0.5 V to 2.075 V with 25-mV resolution, and 0.5 V to 5.15 V using an external resistor divider.
- Excellent power-supply ripple rejection: 40 dB at 500 kHz.
- Adjustable soft-start in-rush control.
- Open-drain power-good (PG) output.
- Remote sensing capability.
Applications
- Macro remote radio units (RRU) and outdoor backhaul units.
- Active antenna system mMIMO (AAS).
- Ultrasound scanners.
- Lab and field instrumentation.
- Sensor, imaging, and radar systems.
- High-speed communications, video, medical, and test and measurement applications.
- Powering high-performance serializer and deserializer (SerDes), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF components.
- Digital loads such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and digital signal processors (DSPs) requiring low-input voltage, low-output (LILO) voltage operation.
Q & A
- What is the maximum dropout voltage of the TPS7A8400ARGRR?
The maximum dropout voltage is 180 mV at 3 A with BIAS.
- What is the output voltage accuracy of the TPS7A8400ARGRR?
The output voltage accuracy is 0.75% maximum over line, load, and temperature with BIAS.
- What is the output voltage noise of the TPS7A8400ARGRR?
The output voltage noise is 4.4 µVRMS.
- What are the output voltage ranges for the TPS7A8400ARGRR?
The output voltage range is 0.8 V to 3.95 V with 50-mV resolution, and adjustable from 0.8 V to 5.15 V using an external resistor divider.
- What is the power-supply ripple rejection (PSRR) of the TPS7A8400ARGRR?
The PSRR is 40 dB at 500 kHz.
- Does the TPS7A8400ARGRR have remote sensing capability?
Yes, it has remote sensing capability.
- What are some typical applications of the TPS7A8400ARGRR?
Typical applications include macro remote radio units, outdoor backhaul units, active antenna systems, ultrasound scanners, lab and field instrumentation, and high-speed communications.
- What package type is the TPS7A8400ARGRR available in?
The device is available in a 20-pin VQFN package.
- What is the operating junction temperature range of the TPS7A8400ARGRR?
The operating junction temperature range is -40°C to 125°C.
- Does the TPS7A8400ARGRR have an open-drain power-good (PG) output?
Yes, it has an open-drain power-good (PG) output.
