Overview
The TPS7A84, specifically the TPS7A8400RGRT model, is a low-noise, low-dropout linear regulator (LDO) produced by Texas Instruments. This device is capable of sourcing up to 3 A with a maximum dropout voltage of 180 mV. It features high accuracy, low output voltage noise, and excellent power-supply ripple rejection (PSRR), making it ideal for powering noise-sensitive components in various high-performance applications.
The TPS7A84 is available in a 20-pin VQFN (RGR) package with a compact 3.5-mm × 3.5-mm footprint. It supports a wide input voltage range from 1.1 V to 6.5 V and offers adjustable output voltage from 0.8 V to 5.0 V using an external resistor divider. The device also includes features such as adjustable soft-start, open-drain power-good output, and remote sensing capabilities.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Maximum Output Current | 3 | A |
| Maximum Dropout Voltage | 180 | mV |
| Output Voltage Accuracy | 1% (max) over line, load, and temperature | % |
| Output Voltage Noise (RMS) | 4.4 µV at 0.8 V, 7.7 µV at 5.0 V | µV |
| Input Voltage Range (Without BIAS) | 1.4 V to 6.5 V | V |
| Input Voltage Range (With BIAS) | 1.1 V to 6.5 V | V |
| Output Voltage Range (ANY-OUT™) | 0.8 V to 3.95 V | V |
| Output Voltage Range (Adjustable) | 0.8 V to 5.0 V | V |
| Power-Supply Ripple Rejection (PSRR) | 40 dB at 500 kHz | dB |
| Operating Temperature Range | -40°C to 125°C | °C |
| Package Type | VQFN (RGR) 20-pin | - |
| Package Size | 3.5-mm × 3.5-mm | mm |
Key Features
- Low dropout voltage: 180 mV (max) at 3 A
- High accuracy: 1% (max) over line, load, and temperature
- Low output voltage noise: 4.4 µV RMS at 0.8 V, 7.7 µV RMS at 5.0 V
- Wide input voltage range: 1.1 V to 6.5 V with BIAS, 1.4 V to 6.5 V without BIAS
- ANY-OUT™ operation: Output voltage range from 0.8 V to 3.95 V
- Adjustable operation: Output voltage range from 0.8 V to 5.0 V using an external resistor divider
- High PSRR: 40 dB at 500 kHz
- Excellent load transient response
- Adjustable soft-start in-rush control
- Open-drain power-good (PG) output
- Stable with a 47-µF or larger ceramic output capacitor
- Remote sensing capabilities
Applications
- High-speed communications
- Video applications
- Medical devices
- Test and measurement equipment
- Macro remote radio units (RRU)
- Outdoor backhaul units
- Active antenna system mMIMO (AAS)
- Ultrasound scanners
- Lab and field instrumentation
- Sensor, imaging, and radar systems
- Digital signal processors (DSP), application-specific integrated circuits (ASIC), and field-programmable gate arrays (FPGA)
- RF components, including RF amplifiers, serializer and deserializer (SerDes), analog-to-digital converters (ADCs), and digital-to-analog converters (DACs)
Q & A
- What is the maximum output current of the TPS7A84?
The TPS7A84 can source up to 3 A of output current.
- What is the maximum dropout voltage of the TPS7A84?
The maximum dropout voltage is 180 mV.
- What is the output voltage accuracy of the TPS7A84?
The output voltage accuracy is 1% (max) over line, load, and temperature.
- What is the output voltage noise of the TPS7A84?
The output voltage noise is 4.4 µV RMS at 0.8 V and 7.7 µV RMS at 5.0 V.
- What is the input voltage range of the TPS7A84?
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.
- What is the ANY-OUT™ operation range of the TPS7A84?
The ANY-OUT™ operation range is from 0.8 V to 3.95 V.
- Can the output voltage of the TPS7A84 be adjusted?
- What is the power-supply ripple rejection (PSRR) of the TPS7A84?
The PSRR is 40 dB at 500 kHz.
- Does the TPS7A84 have a power-good (PG) output?
- What type of capacitor is required for stability in the TPS7A84?
A 47-µF or larger ceramic output capacitor is required for stability.
