公开(公告)号：US06765374B1

公开(公告)日：2004-07-20

申请号：US10617951

申请日：2003-07-10

Applicant: Ta-yung Yang ,  Hsuan-I Pan ,  Chern-Lin Chen ,  Jenn-yu G. Lin

Inventor： Ta-yung Yang ,  Hsuan-I Pan ,  Chern-Lin Chen ,  Jenn-yu G. Lin

IPC: G05F156

CPC classification number: G05F1/575

Abstract: A method an apparatus to dynamically modify the internal compensation of a low drop-out (LDO) linear voltage regulator is presented. The process involves creating an additional equivalent series resistance (ESR) from an internal circuit. The additional ESR of the internal circuit is sufficient to ensure DC output stability. This allows the ESR of the output capacitance to be reduced to zero if desired, for improved transient response. The zero induced by the ESR of the internal circuit is frequency compensated, so that it tracks the position of the output pole as the load varies.

Abstract translation: 提出了一种动态修改低压降（LDO）线性稳压器的内部补偿的装置的方法。 该过程涉及从内部电路产生额外的等效串联电阻（ESR）。 内部电路的额外ESR足以确保直流输出稳定性。 如果需要，这允许输出电容的ESR减小到零，以改善瞬态响应。 由内部电路的ESR引起的零频率被补偿，从而当负载变化时跟踪输出极的位置。