I need some help correctly identifying the U9 and U10 components on the PCB. I've tried some codebooks and I found several options.
H1 - X6603 is a 300mA, low quiescent, high PSRR, low noise and low dropout linear regulator, but the model marked with "Lv" is a 4.7V and this board is a 3.3V
H2 - Toshiba 200 mA CMOS Low Drop-Out Regulator with Fast Load Transient Response TCR2EF series, but Pin 4 is connected to capacitor C46 and it should be NC...
H1 - "4FD" - in the 2011 edition of the active smd components guide, it's a FT521FDa, LDO, Dual out, Vout1/Vout2=2.7V/1.8V±2%, 250mA, +CE, but again it should be 3.3V (4FJ).
Any help? Thanks.