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ANALYSIS AND CHARACTERIZATION OF A PROGRAMMABLE LOW-DROPOUT REGULATOR
abstract
As portable electronic devices become a part of daily life, it creates a huge market for
electronic components for those battery driven devices. Low-dropout (LDO) voltage
regulator is an important part that provides steady DC supplies for other components.
Low power, low noise and high stability are the desired features of a regulator.
Detailed analyses on CMOS LDO design and the designs of two different compensation
schemes for LDO are presented in this thesis. Experimental results of the designed
compensation programmable low-power low-dropout (LDO) Voltage Regulator, in
comparison with an existing compensated LDO, are also presented.
The designed compensation implementation demonstrates a fast transient response and
high stability in all programmable output levels. Testing chip fabricated in a standard
0.35μm CMOS technology provided the important parameters of the regulator, e.g.
transient response, load regulation, line regulation, power supply rejection ratio (PSRR). |
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