The RT9161-36CX is a low dropout (LDO) voltage regulator produced by Richtek USA Inc. that provides a stable 3.6V output. This regulator is characterized by its low quiescent current, high output accuracy, and excellent transient response, making it suitable for a wide array of battery-powered and portable applications. It ensures consistent power delivery even with fluctuating input voltages, contributing to enhanced system stability.

Applications:

• Cellular Phones: Powering critical components like digital signal processors (DSPs) and memory chips that require a precise 3.6V supply.
• Cordless Phones: Supplying the necessary voltage for stable operation of RF transceivers and baseband processors.
• PDAs: Regulating power for displays, processors, and memory, ensuring smooth operation.
• MP3 Players: Providing a clean and reliable voltage for audio processing and digital control circuits.
• GPS Devices: Powering GPS receivers and associated processing units with stable and accurate voltage.
• Wireless LANs: Supplying consistent power to RF components and digital interfaces.
• Bluetooth Devices: Regulating voltage for Bluetooth modules for reliable wireless communication.
• Digital Cameras: Providing a stable voltage for image sensors and processing units.

Features:

• Low Dropout Voltage: Operates effectively with minimal voltage difference between input and output.
• High Output Accuracy: Maintains a precise 3.6V output, essential for stable device operation.
• Low Quiescent Current: Minimizes power consumption when the regulator is in standby or light load conditions.
• Short-Circuit Protection: Protects both the regulator and the connected load from damage in the event of a short circuit.
• Over-Temperature Protection: Prevents thermal damage by shutting down the regulator when its temperature exceeds safe limits.
• Stable with Ceramic Capacitors: Compatible with low-ESR ceramic output capacitors, enabling a compact design.
• Enable/Disable Control: Allows for remote shutdown of the regulator to reduce power consumption in idle states.

Benefits:

• Extended Battery Life: Low quiescent current and low dropout voltage prolong battery life in portable devices.
• Reliable Performance: High output accuracy and built-in protection features ensure stable and dependable operation.
• Simplified Design: Stability with ceramic capacitors reduces the need for external components, simplifying PCB layout.
• Reduced Power Consumption: Enable/disable control minimizes power draw in standby mode.
• Enhanced Protection: Short-circuit and over-temperature protection safeguard the device and connected components.

Additional Details:

The RT9161-36CX is commonly available in small surface-mount packages such as SOT-23-5. The dropout voltage varies depending on output current and temperature, and the datasheet should be consulted for detailed specifications. The device also boasts excellent line and load regulation, which ensures a stable output voltage under varying input and load conditions.