TPS74501PBQWDRVRQ1 – TEXAS INSTRUMENTS

The TPS74501PBQWDRVRQ1 is a low-noise, low-dropout (LDO) linear regulator from Texas Instruments, packaged in a thermally enhanced, 4x4mm, 16-pin QFN (PW) package. It operates with an input voltage range of 2.5V to 5.5V, providing a fixed 1.8V output with a maximum output current of 150mA. This device features a very low quiescent current of typically 70µA, crucial for battery-powered applications. Its output noise voltage is exceptionally low, specified at just 15µVrms, making it ideal for sensitive analog circuitry. The TPS74501 employs internal current limiting and thermal shutdown for robust operation and protection against overloads. The device’s high PSRR (Power Supply Rejection Ratio) effectively minimizes ripple and noise from the input supply. Common applications include powering sensitive analog-to-digital converters (ADCs), microcontrollers, and other low-power, noise-sensitive integrated circuits where a clean, stable 1.8V rail is required. Its advantages lie in its combination of low noise, low quiescent current, and compact size, making it suitable for space-constrained designs demanding high-quality voltage regulation. The “R” in the part number denotes the RoHS compliance.