RT9059A

® RT9059A 3A, Ultra-Low Dropout Voltage Regulator General Description The RT9059A is a high performance positive voltage regulator designed for use in applications requiring very low input voltage and very low dropout voltage at up to 3A. It operates with a VIN as low as 1V and VDD voltage 3V with programmable output voltage as low as 0.8V. The RT9059A features ultra-low dropout, ideal for applications where VOUT is very close to VIN. Additionally, it has an enable pin to further reduce power dissipation while shutdown. The RT9059A provides excellent regulation over variations in line, load and temperature. The RT9059A provides a power good signal to indicate if the voltage level of VO reaches 90% of its rating value. Ordering Information RT9059A Package Type QW : WDFN-10L 3x3 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are :  RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.  Suitable for use in SnPb or Pb-free soldering processes. Features  Output Current up to 3A  High Accuracy ADJ Voltage 1.5%  Dropout Voltage 350mV @ 3A Typically  VOUT Power Good Signal  VOUT Pull Low Resistance when Disable  Current-Limit Protection  Thermal Shutdown Protection  RoHS Compliant and Halogen Free Applications  Notebook PC Applications  Motherboard Applications Marking Information 4S= : Product Code 4S=YM DNN YMDNN : Date Code Pin Configuration (TOP VIEW) VOUT 1 VOUT 2 VOUT 3 ADJ 4 PGOOD 5 ...