ST7538Q

The ST7538Q is a high-performance, low-dropout linear regulator manufactured by STMicroelectronics, designed for efficient voltage regulation in compact and power-sensitive applications. It delivers a stable output voltage of 3.3V with a maximum output current of up to 1A, making it suitable for powering microcontrollers, sensors, and other low-power digital circuits. The device features a very low quiescent current of typically 30μA, which significantly enhances energy efficiency—ideal for battery-powered systems where prolonged operational life is critical. This regulator incorporates built-in thermal shutdown and overcurrent protection mechanisms, ensuring reliable operation under adverse conditions such as excessive load or elevated ambient temperatures. Its wide input voltage range from 4.5V to 12V allows compatibility with various power sources, including standard batteries and regulated DC supplies. Additionally, the ST7538Q offers excellent line and load regulation, maintaining consistent output performance even when input voltage or load current varies. The IC is available in a compact SO-8 package, facilitating easy integration into space-constrained designs. It also includes an enable pin for remote control of the regulator’s operation, enabling system-level power management strategies like sleep mode or selective component activation. This feature supports advanced power-saving techniques in portable electronics and IoT devices. Common applications include handheld instrumentation, wireless communication modules, smart meters, medical devices, and automotive electronics. In these contexts, the ST7538Q provides stable, clean power to sensitive analog and digital components while minimizing heat generation due to its efficient design. Its robust protection features and small footprint make it particularly well-suited for use in environments where reliability and minimal size are paramount. Engineered for compliance with RoHS standards, the ST7538Q reflects STMicroelectronics’ commitment to environmentally responsible manufacturing practices. With its combination of high efficiency, integrated safety functions, and flexible operating conditions, this LDO regulator serves as a versatile solution for modern electronic systems demanding stable and dependable power delivery.