Transient-enhanced output-capacitorless CMOS LDO regulator for battery-operated systems

This paper presents a low-power fully integrated 0.18 μm CMOS Low-Dropout (LDO) Voltage Regulator for battery-operated portable devices. A single stage high-gain telescopic cascode-compensated amplifier is used to attain good static performances, while thanks to a very simple dynamic bias circuit, transient performances are significantly enhanced with no quiescent current penalty. Results validate a 1.8 V output voltage from a 3.6 V to 1.9 V battery input voltage, delivering a load current of 50 mA over a 100 pF load. The quiescent current is only 7 μΑ, the line and load regulation are respectively 0.159 mV/V and 0.017 mV/mA, and settling times are lower than 4.6 μs at full load transient.

[1]  Chung-Chih Hung,et al.  A fast self-reacting capacitor-less low-dropout regulator , 2011, 2011 Proceedings of the ESSCIRC (ESSCIRC).

[2]  Gabriel A. Rincon-Mora,et al.  A low-voltage, low quiescent current, low drop-out regulator , 1998, IEEE J. Solid State Circuits.

[3]  Qiang Li,et al.  An Ultrafast Adaptively Biased Capacitorless LDO With Dynamic Charging Control , 2012, IEEE Transactions on Circuits and Systems II: Express Briefs.

[4]  Pui Ying Or,et al.  An Output-Capacitorless Low-Dropout Regulator With Direct Voltage-Spike Detection , 2010, IEEE Journal of Solid-State Circuits.

[5]  Edgar Sánchez-Sinencio,et al.  Full On-Chip CMOS Low-Dropout Voltage Regulator , 2007, IEEE Transactions on Circuits and Systems I: Regular Papers.

[6]  Yiannos Manoli,et al.  A 200ns settling time fully integrated low power LDO regulator with comparators as transient enhancement , 2016, 2016 IEEE International Symposium on Circuits and Systems (ISCAS).

[7]  Franco Maloberti,et al.  Analog Design for CMOS VLSI Systems , 2001 .

[8]  Robson L. Moreno,et al.  A Low Power CMOS Voltage Regulator for a Wireless Blood Pressure Biosensor , 2012, IEEE Transactions on Instrumentation and Measurement.