The RT9166A-36PXL is a low dropout (LDO) voltage regulator from Richtek USA Inc. It is designed to provide a stable and accurate 3.6V output voltage. This regulator is optimized for applications where low power consumption, high efficiency, and small size are critical, making it suitable for portable and battery-powered devices.

Applications

• Portable Devices: Powering microcontrollers, sensors, and other low-power components in devices such as wearables, IoT devices, and portable medical equipment.
• Wireless Communication Modules: Providing stable voltage for transceivers and RF front-ends in Bluetooth modules, Wi-Fi modules, and other wireless communication devices.
• Memory Power Supplies: Regulating voltage for various types of memory, including flash memory and SRAM.
• Microcontroller Power Supplies: Supplying stable power to microcontrollers in embedded systems.
• Post-Regulation: Reducing noise and ripple in power supplies for sensitive analog circuits.

Features

• Low Dropout Voltage: Operates with a minimal voltage difference between input and output, maximizing efficiency and extending battery life.
• High Output Accuracy: Maintains a precise 3.6V output voltage, ensuring stable operation of connected devices.
• Low Quiescent Current: Consumes minimal current when not actively supplying a load, further extending battery life.
• Short-Circuit Protection: Protects the regulator and connected devices from damage due to short circuits.
• Over-Temperature Protection: Shuts down the regulator if the temperature exceeds safe limits, preventing overheating and damage.
• Enable/Disable Control: Allows the regulator to be turned on or off via an external signal, reducing power consumption when the device is not in use.
• Small Package Size: Available in compact packages, suitable for space-constrained applications.

Benefits

• Extended Battery Life: Low quiescent current and low dropout voltage contribute to increased energy efficiency, prolonging battery life in portable devices.
• Stable and Reliable Power Supply: High output accuracy and robust protection features ensure a stable and reliable power supply for sensitive electronic components.
• Reduced System Cost: Integrated protection features eliminate the need for external protection components.
• Simplified Design: Easy to use and requiring few external components, simplifying the design process.
• Improved System Performance: Clean and stable power supply minimizes noise and interference, improving the overall performance of the system.

Additional Details

The RT9166A-36PXL is designed to operate over a wide input voltage range. It is typically available in small surface-mount packages such as SOT-23. The enable pin allows for external control of the regulator's output, providing a convenient way to reduce power consumption when the device is not in use. The over-temperature protection feature prevents the regulator from overheating in the event of an overload condition, ensuring long-term reliability. The low dropout voltage allows the regulator to operate efficiently even when the input voltage is close to the output voltage, making it ideal for battery-powered applications where the battery voltage decreases over time.