company blog about Original TI LDO Regulator, Supply TPS7A8400ARGRR 3A Low Noise, Low Dropout Linear Regulator

Original TI LDO Regulator, Supply TPS7A8400ARGRR 3A Low Noise, Low Dropout Linear Regulator

Shenzhen Mingjiada Electronics Co., Ltd.——Long Term Supply TI (TPS7A8400ARGRR) 3A, Low Input Voltage (1.1V), Low Noise, High Accuracy, Ultra Low Dropout Regulator with Power On Indication.

The following is a product breakdown of the TI (TPS7A8400ARGRR) LDO regulator:
Model: TPS7A8400ARGRR
Package: VQFN-20
Type: Low Dropout Linear Regulator

TPS7A8400ARGRR——Product Description Details
Core Functions: The TPS7A8400ARGRR is a high accuracy, ultra-low noise, high power supply rejection ratio (PSRR), high current (3A) linear regulator.
Key Benefits:
Ultra-low Noise: Extremely low output voltage noise is achieved by integrating an internal bypass capacitor, eliminating the need for additional noise filtering capacitors.
High PSRR: Provides excellent power supply noise rejection over a wide frequency range, effectively filtering out ripple and noise from the input supply.
High Current Output: Continuous output current up to 3A to meet the needs of high power consumption loads.
Low Dropout Voltage: Very low dropout voltage at full load (3A) improves efficiency and allows operation at lower input voltages.
High Accuracy: High output voltage accuracy ensures point-of-load voltage stability.
Wide Input Voltage Range: Adaptable to a wide range of input power sources.
Adjustable Output Voltage: Fixed and adjustable voltage versions are available (TPS7A8400ARGRR is an adjustable voltage version).
Integrated Protection: Safety features such as overcurrent protection (OCP) and temperature shutdown protection (TSD) are included.
Enable Control: Enable pin (EN) for power timing management and power saving.
Package: Available in a 20-pin VQFN (RGR) package, with ARGRR suffix referring to this package (RGR) and tape-and-reel (R).

TPS7A8400ARGRR——Specifications (Summary of Key Parameters)
Output Current: 3A (continuous)
Input Voltage Range (VIN): 1.1V to 6.5V (Absolute Maximum Ratings are typically -0.3V to 7V, refer to datasheet for specific conditions of operation)
Output Voltage Range (VOUT):
Fixed Voltage Versions: Specific values available (e.g., 0.8V, 0.9V, 1.0V, 1.2V, 1.5V Fixed voltage version: with specific values (e.g. 0.8V, 0.9V, 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, etc).
Adjustable voltage version (TPS7A8400ARGRR): 0.8V to 5.2V (set by external resistor divider).
Differential Voltage (TPS7A8400ARGRR):
Typical: 150mV @ 3A (VOUT=1.8V)
Maximum: Refer to datasheet (typically in the 200-250mV range @ 3A depending on VOUT and temperature)
Output Voltage Noise:
Ultra-Low Noise Mode: 4.7 μVRMS (Typical) (10Hz to 100kHz bandwidth with a 0.01 μF capacitor connected to the BYP pin). This is one of its most outstanding features.
Standard mode: Noise is slightly higher (about 20-30 μVRMS), but PSRR may vary slightly.
Power Supply Rejection Ratio (PSRR):
Typical: > 70dB @ 10kHz (VIN = VOUT(NOM) + 0.5V, IOUT=100mA, BYP=0.01μF)
> 50dB @ 100kHz
> 40dB @ 1MHz (values depend on VIN, VOUT, IOUT, BYP capacitance, and frequency)
Output Voltage Accuracy (TPS7A8400ARGRR):
Lines Linearity: Very low (e.g., 0.01%/V order of magnitude).
Load regulation: Very low (e.g., 0.1%/A level).
Initial Accuracy: ±1% (under specified conditions, e.g., 25°C).
Temperature Drift: Typically within ±100ppm/°C.
Quiescent Current (Iq):
Operating: Typically approximately 1.5mA - 2.5mA (depending on operating mode and load).
Off state (EN=Low): Typical < 1μA.
Enable Pins (EN):
Logic High: Enables the device.
Logic Low: Turns off the device, significantly reducing power consumption.
Threshold Voltage: Typically approximately 1.2V - 1.3V (see datasheet).
Operating Junction Temperature Range (TJ): -40°C to +125°C
Thermal Resistance (Junction to Ambient - θJA): Approx. 28°C/W typical for VQFN-20 (RGR) packages (dependent on PCB design such as copper foil area and thermal vias). This is a critical parameter for high current LDO designs!
Protections (TPS7A8400ARGRR):

Overcurrent Protection (OCP): Foldback current limiting protection.
Temperature shutdown protection (TSD): output shutdown when the junction temperature exceeds a safe threshold (typically around 165°C) and automatic recovery when the temperature drops.
Package: 20-pin VQFN (3.5mm x 4.5mm) - RGR

TPS7A8400ARGRR——Key Features (Highlights)
3A high output current: capable of driving demanding high power loads.
Ultra-low noise (4.7μVRMS): Integrated noise filter bypass (BYP pin) makes it ideal for noise-sensitive analogue and RF circuits, significantly outperforming common LDOs and most switching power supplies.
High PSRR (>70dB @10kHz): Effectively suppresses ripple and noise from input sources such as switching power supplies over a wide frequency range, providing a clean output voltage.
Ultra-low dropout voltage (150mV @3A): Minimises power loss (in the form of heat), improves efficiency, and allows operation at input voltages closer to the output voltage, or maintains stable output for longer periods of time when the input voltage drops.
Wide Input Voltage Range (1.1V-6.5V): Compatible with a variety of power buses (e.g. Li-Ion batteries, 5V/3.3V system buses, back-regulated switching power outputs).
Adjustable Output Voltage (0.8V-5.2V): Provides design flexibility to power various point-of-load voltages.
High Accuracy (±1%): Ensures stable, accurate voltages for precision circuits.
Low quiescent current: Helps improve system efficiency, especially at light loads or in standby mode.
Enable Control (EN): Supports power timing management and power saving.
Integrated protection (OCP, TSD): Enhances system reliability.
Small VQFN package: Saves PCB space.

TPS7A8400ARGRR——Typical Applications
The TPS7A8400ARGRR's low noise, high PSRR, high current, and low dropout characteristics make it ideal for the following applications where power quality is critical:
Wireless Communication Infrastructure:
5G/4G/LTE Base Stations: Power supply for RF power amplifiers (PAs), power supply for low-noise amplifiers (LNAs), mixers, voltage-controlled oscillators (VCOs), phase-locked loops (PLLs). Power supplies for
Microwave return equipment.
Satellite communication terminals.
Test and Measurement Equipment:
Reference voltage sources and analogue power supplies for high precision ADCs/DACs.
Sensitive analogue front-end circuits for oscilloscopes, spectrum analysers, signal generators.
Signal conditioning circuits for precision sensors.
Medical Electronics:
Analogue front-end and data acquisition systems for medical imaging equipment (ultrasound, MRI, CT).
High precision measurement circuits in portable medical equipment.
Vital signs monitoring equipment.
Industrial Automation and Instrumentation:
Data Acquisition Systems (DAQ).
High precision sensor interfaces for process control.
Analogue I/O modules for industrial PLCs.
Audio Devices:
High-end DACs, ADCs, op-amps, and headphone amplifiers powered by the pursuit of very low noise floor.

TI's TPS7A8400ARGRR is a flagship 3A LDO for high-end, noise-sensitive applications. The TPS7A8400ARGRR provides the industry's current leading pure, stable, and high-efficiency power solution for critical circuits such as RF, precision analogue, data conversion, and medical devices, through a combination of ultra-low integrated noise (4.7μVRMS), excellent PSRR (>70dB @10kHz), and ultra-low dropout (150mV @3A). The combination of these features provides today's industry-leading pure, stable, and highly efficient power solutions for critical circuits such as RF, precision analogue, data conversion, and medical devices.

【Mingjiada Electronics】Long-term supply of TI (TPS7A8400ARGRR) ultra-low dropout voltage regulator, for more information about TPS7A8400ARGRR products, welcome to visit the official website of Mingjiada Electronics (https://www.integrated-ic.com/) for more details: