• Wide Operating Voltage Ranges : 2.2V to 5.5V
• Low Dropout : 250mV at 500mA
• 5mA Discharge Current of V OUT when IC Shutdown
• Ultra-Low-Noise for DSC Application
• Ultra-Fast Response in Line/Load Transient
• Current Limiting Protection
• Thermal Shutdown Protection
• High Power Supply Rejection Ratio
• Output Only 1μ μ μF Capacitor Required for Stability
• TTL-Logic-Controlled Shutdown Input
• RoHS Compliant and 100% Lead (Pb)-Free


• Digital Still Camera
• CDMA/GSM Cellular Handsets
• Portable Information Appliances
• Laptop, Palmtops, Notebook Computers
• Mini PCI & PCI-Express Cards
• PCMCIA & New Cards


The RT9020 is a high-performance, 500mA LDO regulator, offering extremely high PSRR and ultra-low dropout, ideal for portable RF and wireless applications with demanding performance and space requirements.

The RT9020 quiescent current is as low as 25μA, further prolonging the battery life. The RT9020 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices.

The RT9020 consumes typical 0.7μA in shutdown mode and has fast turn-on time less than 70μs (without C SS ).

The other features include ultra-low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Tiny packages SOT-23-5 and SC-70-5 are available.