Title :
Soft-start low voltage CMOS LDO
Author :
Stanescu, Cornel ; Dinca, Cristian ; Iacob, Radu
Author_Institution :
Stand. Products Group, ON Semicond. Romania S.R.L. Bucharest, Bucharest, Romania
Abstract :
The paper presents a soft-start low voltage CMOS LDO. A double-reference bandgap was developed to provide the soft-start feature. The first reference is quicker and drives the start-up circuit, while the second is slower and, after being divided, drives the LDO core. This circuit technique allows the reduction of the supply voltage and the control of the output voltage rise time through an external capacitor in order to reduce the inrush current at start-up. Also, there is no overshoot on the output voltage at start-up, even for large capacitive loads.
Keywords :
CMOS analogue integrated circuits; low-power electronics; voltage regulators; LDO core; capacitive load; circuit technique; double-reference bandgap; inrush current reduction; low-drop-out voltage regulators; output voltage rise time; soft-start feature; soft-start low-voltage CMOS LDO; start-up circuit; supply voltage reduction; CMOS integrated circuits; Capacitors; Photonic band gap; Resistors; Surges; Transistors; Voltage control;
Conference_Titel :
Semiconductor Conference (CAS), 2013 International
Conference_Location :
Sinaia
Print_ISBN :
978-1-4673-5670-1
Electronic_ISBN :
1545-827X
DOI :
10.1109/SMICND.2013.6688650
