The AP2112 is CMOS process low dropout linear regulator that delivers a 600mA (min.) continuous load current. The AP2112 comes with an Enable function with a fixed output voltage of 1.2V, 1.8V, 2.5V, 2.6V, or 3.3V.
RT9193 is an Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator with power consumption less than 0.01μA in shutdown mode and has fast turn-on time less than 50μs.