A Novel Off-chip Capacitor-less CMOS LDO with Fast Transient Response
نویسندگان
چکیده
Abstract: A novel low-dropout (LDO) regulator without external capacitor featuring with fast transient response and low-power dissipation for System-On-Chip (SOC) is proposed in this paper. By introducing an auxiliary feedback path to splits the poles without using a miller compensating scheme, the proposed LDO achieves fast transient response and high stability under all operating conditions. In addition, the transient response is further improved for a buffer stage is utilized. The proposed LDO with a dropout voltage of 200 mV was fabricated in a 0.35um CMOS technology. With the excellent transient response and the highest efficiency about 95%, the proposed LDO has the qualification to be integrated in SOC.
منابع مشابه
Capacitor-less Low Dropout Voltage Regulator
The study of power management techniques has increased drastically within the last few years corresponding to the vast increase in the use of portable, handheld battery applications. These power management systems typically contain several LDO voltage regulators that require large external capacitors. The large external capacitors can not be fully integrated in standard CMOS technologies and hi...
متن کاملAn Enhanced Slew Rate Output Capacitor-free Low Dropout Regulator Based on Differential Transconductance Amplifier
A highly current-efficient and fast transient response capacitor-free low-dropout regulator (LDO) for Systemon-Chip (SoC) applications is presented in this paper. The proposed architecture is implemented using 0.35 μm CMOS technology. The proposed circuit is based on differential transconductance and push-pull amplifier. Common mode feedback (CMFB) resistors and direct voltage spike detection u...
متن کاملImproved Transient Response Capacitor-less Low Drop-out (LDO) Regulator using Current Mode Transconductance Amplifier and Slew Rate Enhancement Technique
This paper presents a capacitor-less low drop-out (LDO) regulator with current mode transconductance amplifier & slew-rate enhancement circuit. The proposed current mode transconductance amplifier as error amplifier improves the slew rate & slewrate enhancement circuit further senses the transient voltage at the output of the LDO to increase the bias current of the error amplifier for a short d...
متن کاملAn on-chip Low Drop-Out Voltage Regulator with 150mA Driving Capability
Transient response; Power supply rejection. Abstract—To realize DC voltage conversion from 3.3V to 1.8V for SoC application, a fully on-chip Low Drop-Out (LDO) voltage regulator with 150mA driving capability is presented. Implemented in 0.18μm CMOS technology, the proposed LDO voltage regulator utilizes paralleled input differential pairs and current amplifiers to provide fast transient respons...
متن کاملA capacitor-free CMOS LDO regulator with AC-boosting and active-feedback frequency compensation
A capacitor-free CMOS low-dropout (LDO) regulator for system-on-chip (SoC) applications is presented. By adopting AC-boosting and active-feedback frequency compensation (ACB-AFFC), the proposed LDO regulator, which is independent of an off-chip capacitor, provides high closed-loop stability. Moreover, a slew rate enhancement circuit is adopted to increase the slew rate and decrease the output v...
متن کامل