Brain-machine　Interface　(BMI)　with　implantable　bioelectronics　systems　can　provide　an　alternative　way　to　cure　neural　diseases,　while　a　power　management　system　plays　an　important　role　in　providing　a　stable　voltage　supply　for　the　implanted　chip.　a　prototype　system　of　power　management　integrated　circuit　(PMIC)　with　heavy　load　capability　supplying　artifacts　tolerable　neural　recording　integrated　circuit　(ATNR-IC)　is　presented　in　this　work.　A　reverse　nested　miller　compensation　(RNMC)　low　dropout　regulator　(LDO)　with　a　transient　enhancer　is　proposed　for　the　PMIC.　The　power　consumption　is　0.55　mW　and　22.5　mW　at　standby　(SB)　and　full　stimulation　(ST)　load,　respectively.　For　a　full　load　transition,　the　overshoot　and　downshoot　of　the　LDO　are　110　mV　and　71　mV,　respectively,　which　help　improve　the　load　transient　response　during　neural　stimulation.　With　the　load　current　peak-to-peak　range　is　about　560　mu　A　supplied　by　a　4-channel　stimulator,　the　whole　PMIC　can　output　a　stable　3.3　V　supply　voltage,　which　indicates　that　this　PMIC　can　be　extended　for　more　stimulating　channels＇　scenarios.　When　the　ATNR-IC　is　supplied　for　presented　PMIC　through　a　voltage　divider　network,　it　can　amplify　the　signal　consisting　of　1　mV(pp)　simulated　neural　signal　and　20　mV(pp)　simulated　artifact　by　28　dB　with　no　saturation.