The TPS70933DBVR is a low-dropout (LDO) linear regulator from Texas Instruments, designed for low-noise, high-precision voltage regulation in sensitive analog and digital circuits. This device delivers a fixed output voltage of 3.3V with a quiescent current of 80 µA, ensuring efficient power delivery in battery-powered and low-power applications. It supports an input voltage range of 1.8V to 15V and can supply up to 300 mA of continuous output current. Its compact VSSOP-8 package and wide operating temperature range (-40°C to +125°C) make it suitable for industrial, automotive, and medical electronics requiring stable power in harsh environments.

Key Features

The TPS70933DBVR features ultra-low noise performance (30 µVrms from 10 Hz to 100 kHz) and high power supply rejection ratio (PSRR) of -70 dB at 1 kHz, minimizing voltage ripple and ensuring clean power for noise-sensitive circuits. It offers a low dropout voltage (0.15V at 300 mA load), enabling efficient operation even with narrow input-to-output voltage margins. Built-in protections include overcurrent, overtemperature, and reverse-current blocking, enhancing system reliability. Its wide input voltage range and thermal stability make it ideal for applications with fluctuating power supplies.

Applications

Primarily used in precision instrumentation, the TPS70933DBVR is critical for powering analog-to-digital converters (ADCs), RF front-ends, and sensor interfaces in industrial automation, test equipment, and medical devices. It is also employed in automotive electronics for infotainment systems and safety sensors, where low noise and high reliability are paramount. Its low quiescent current makes it suitable for battery-operated devices like portable diagnostics tools and IoT nodes, while its robust design suits rugged industrial and aerospace applications.

Summary

The TPS70933DBVR combines low noise, high PSRR, and broad input/output flexibility, making it a premier choice for powering precision circuits in demanding environments. Its compact form factor, dropout efficiency, and integrated protections cater to applications requiring clean, stable voltage regulation without compromising power integrity or reliability. This LDO is indispensable for engineers designing systems where signal fidelity and power stability are critical, such as in industrial, medical, and automotive electronics.