The　digital　low　dropout　regulators　are　widely　used　because　it　can　operate　at　low　supply　voltage.　In　the　digital　low　drop-out　regulators,　the　high　sampling　frequency　circuit　has　a　short　setup　time,　but　it　will　produce　overshoot,　and　then　the　output　can　be　stabilized;　although　the　low　sampling　frequency　circuit　output　can　be　directly　stabilized,　the　setup　time　is　too　long.　This　paper　proposes　a　two　sampling　frequency　circuit　model,　which　aims　to　include　the　high　and　low　sampling　frequencies　in　the　same　circuit.　By　controlling　the　sampling　frequency　of　the　circuit　under　different　conditions,　this　allows　the　circuit　to　combine　the　advantages　of　the　circuit　operating　at　different　sampling　frequencies.　This　shortens　the　circuit　setup　time　and　the　stabilization　time　at　the　same　time.　©　2019　IEEE.