View rt9013 datasheet:

Preliminary RT9013 500mA, Low Dropout, Low Noise Ultra-Fast Without Bypass Capacitor CMOS LDO Regulator General Description Features Wide Operating Voltage Ranges : 2.2V to 5.5V The RT9013 is a high-performance, 500mA LDO regulator, Low Dropout : 250mV at 500mA offering extremely high PSRR and ultra-low dropout. Ideal Ultra-Low-Noise for RF Application for portable RF and wireless applications with demanding Ultra-Fast Response in Line/Load Transient performance and space requirements. Current Limiting Protection The RT9013 quiescent current as low as 25µA, further Thermal Shutdown Protection prolonging the battery life. The RT9013 also works with High Power Supply Rejection Ratio