A CMOS low dropout regulator with dynamic zero compensation
Journal
Electronics Letters
Journal Volume
43
Journal Issue
14
Pages
751-752
Date Issued
2007-07
Author(s)
Abstract
The output capacitor and its equivalent series resistance (ESR) often limit the stability of a conventional low dropout regulator (LDR). A CMOS LDR with dynamic zero compensation is presented to tolerate the wide range of the output capacitor and the ESR. The stability constraints for the output capacitor with the ESR are derived. The measured LDR is stable for the output capacitor 2nF-47uF with ESR of 0.1-50Ω. The maximum quiescent current of this LDR with a bandgap reference is 43.2uA and its maximum output current is 150mA for the output voltage of 1.8V. © The Institution of Engineering and Technology 2007.
Other Subjects
Capacitors; CMOS integrated circuits; Electric resistance; Energy gap; Dynamic zero compensation; Equivalent series resistance (ESR); Low dropout regulator (LDR); Stability constraints; Electric current regulators
Type
journal article