Design and implementation of a low voltage regulator and stabilized output using the body power supply solution
Subject Areas : Electronics Engineering
vahid dahideh
1
,
hamed aminzadeh
2
,
عبدالرسول Ghasemi
3
1 - Islamic Azad University, Bushehr Branch, Bushehr, Iran
2 - هیئت علمی دانشگاه پیام نور تهران
3 - Islamic Azad University Boushehr Branch
Keywords:
Abstract :
In this paper, we have designed and implemented low voltage drop regulators and very small output changes using new solutions. In the regulator circuit structure, for the first time, two solutions of body power supply and variable voltage reference have been used. The power supply of the body, with the aim of increasing the gain of the regulation loop and using the variable voltage reference, has been done with the aim of further stabilizing the output voltage and increasing the power supply removal ratio (PSRR). Another important point in this paper is the implementation of the error amplifier with the help of three single-headed operational amplifiers with PMOS input, which significantly increases the accuracy of the regulation loop. The obtained PSRR value is equal to 46dB at a frequency of 1KHz. The input voltage can vary between 1.8V to 2.5V and the stabilized output voltage is 1.6V. The maximum output voltage ripple is equal to 1mV, which is equivalent to 0.03%. The output ohmic load is equal to 20 and the average capacitive load is equal to 100pF. The maximum output current for the desired output impedance and voltage drop of 0.2V is equal to 80mA.
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[4] G. Patounakis, Y. W. Li and K. Shepard, “A Fully Integrated On-Chip DC- DC Conversion and Power Management System,” IEEE J. Solid-State Circuits, Vol. 39, No. 3, pp. 443- 451, Mar, 2004.
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_||_[1] G. Hanington, P. Chen, P. Asbeck and L. Larson, “High- Efficiency Power Amplifier Using Dynamic Power-Supply Voltage for CDMA Applications,” IEEE Trans. Microwave Theory Tech., vol. 74, pp. 1471- 1476, Aug. 1999.
[2] A. Saberkari, E. Alarcon, and Sh. B. Shokouhi, “Fast Transient Current-Steering CMOS LDO Regulator Based on Current Feedback Amplifier,” Integration, the VLSI Journal (2012), DOI: 10.1016/ vlsi.2012.02.001.
[3] W.Oh, B. Bakkaloglu, “A CMOS Low-Dropout Regulator with Current-Mode Feedback Buffer Amplifier,” IEEE Trans. Circuits Syst. II, Vol. 54, No. 10, pp. 922-926, Oct. 2007.
[4] G. Patounakis, Y. W. Li and K. Shepard, “A Fully Integrated On-Chip DC- DC Conversion and Power Management System,” IEEE J. Solid-State Circuits, Vol. 39, No. 3, pp. 443- 451, Mar, 2004.
[5] B. Razavi, Design of Analog CMOS Integrated Circuits, Boston, MA: McGrow Hill, 2001.
