Fast-Transient Low-Dropout Regulators in the IBM 0.13um BiCMOS Process
Lucas Duncan · OhioLink ETD Center (Ohio Library and Information Network) · 2012
This thesis presents work on the design of 1.5V, 100mA low-dropout (LDO) regulators with fast transient responses in the IBM8HP 0.13µm BiCMOS process.A conventional LDO architecture intended for use in an RF system was implemented and measured.The design of a printed circuit board (PCB) that is capable of measuring all pertinent characteristics of the regulator is also presented.Measurements show that the conventional design achieves a recovery time of less than 100ns with output voltage variations of less than 50mV.In addition to the conventional design, a new output capacitor-free architecture is introduced that can be fully integrated onto a chip.Simulations show that the output capacitor-free design achieves a recovery time of less than 50ns with output voltage variations of less than 140mV.First, I would like to thank my adviser, Dr. Steven Bibyk, for facilitating my interest in circuit design from