RT9193-33GB Key Technical Parameters Detailed Explanation

^{September 10, 2025 News — With increasing demands for power accuracy in portable electronic devices, low-dropout linear regulators (LDOs) play a critical role in signal processing circuits. The RT9193-33GB, manufactured using CMOS technology, supports an input voltage range of 2.5V to 5.5V and delivers a fixed 3.3V output with a maximum output current of 300mA. Featuring ±2% output voltage accuracy and 70dB power supply rejection ratio (PSRR), it is suitable for analog and digital circuits requiring stable power supply.}

^{The RT9193-33GB utilizes CMOS technology, supporting an input voltage range of 2.5V to 5.5V while delivering a precise 3.3V±2% output voltage with 300mA load capability. The device features a 220mV low dropout voltage, 130μA quiescent current, and 70dB power supply rejection ratio (PSRR). It integrates overcurrent and thermal protection functions and is housed in a SOT-23-5 package, making it suitable for applications with stringent space and power qualityrequirements.}

^{1.Industrial Control: Provides stable reference voltage for PLC modules and sensors.}

^{2.Communication Equipment: Powers RF front-end modules and base station interface circuits.
3.Medical Electronics: Supports precision power supply for portable monitoring devices and medical sensors.
4.Consumer Electronics: Applied in power management for audio codecs and smart wearable devices.
5.Automotive Electronics: Used in power supply for in-vehicle infotainment systems and driver assistance modules.}

^{6.Test and Measurement: Delivers low-noise analog power for precision instruments.}

^{RT9193-33GB is a high-performance low-dropout linear regulator (LDO) designed with advanced CMOS technology and integrated with multiple intelligent control functions. Below is a core module analysis based on its functional block diagram:}

^{Core Functional Modules}

^{1.Enable Control Module:}

^{Employs a digital enable pin design compatible with standard TTL/CMOS logic levels.}

^{Typical enable voltage >1.5V, shutdown voltage <0.4V.}

^{Quiescent current in shutdown state is less than 0.01μA}

^{2.Fast Start-up Circuit:}

^{Incorporates proprietary fast start-up technology with a typical start-up time of 50μs.}

^{Integrated soft-start function effectively prevents inrush current surges, ensuring smooth output voltage establishment.}

^{3.Window Logic Control:}

^{Monitors input and output voltage status in real time.}

^{Intelligently controls the operating point of the error amplifier.}

^{Provides logical judgment functions for overload and short-circuit protection.}

^{4.MOSFET Driver:}

^{Drives a low on-resistance P-MOSFET pass transistor to provide 300mA continuous output current capability.}

^{The dropout voltage at 300mA load is typically 220mV.}

^{5.Protection Circuit:}

^{Integrates cycle-by-cycle overcurrent protection with a current limit range of 350-400mA.}

^{Overtemperature protection threshold set at 160°C.}

^{Supports automatic recovery after fault clearance.}

Operating Characteristics​

^{Application Advantages}

^{​70dB PSRR: Effectively suppresses power supply noise, suitable for RF/audio applications}

^{Noise Optimization: Integrated noise bypass pin with external 22nF capacitor for further noise reduction}

^{Triple Protection: Overcurrent/overtemperature/short-circuit protection with automatic fault recovery}

^{Miniaturized Design: SOT-23-5 package, requires only 2 external capacitors}

^{Applicable Scenarios}

^{Ideal for space-constrained battery-powered devices such as smartphones, medical equipment, and wireless modules, providing high-precision low-noise power solutions.}

^{Core Circuit Architecture
The typical application circuit of the RT9193-33GB demonstrates its simple and efficient design philosophy, requiring only a minimal number of external components to build a complete voltage regulation solution:}

^{External Component Selection Guide}

Pin Function Definitions

SOT-23-5/SC-70-5/TSOT-23-5 Package

WDFN-6L 2x2 Package

MSOP-8 Package

Selection Recommendations

^{Space-constrained applications: Recommend WDFN-6L 2x2 package}

^{General applications: Recommend SOT-23-5 package}

^{High heat dissipation requirements: Recommend MSOP-8 package}

^{All packages comply with RoHS standards}

For procurement or further product information, please contact:86-0775-13434437778,

Or visit the official website:https://mao.ecer.com/test/icsmodules.com/,Visit the ECER product page for details: [链接]