Stacked mosfet structures made of low-voltage devices suffer from degraded transient response or large footprint when a capacitorless or dominant-pole compensated low-dropout (LDO) regulator biases the driver. Due to the self-stabilizing nature, the proposed stacked mosfet driver (SMD) technology effectively drives the power stage and greatly reduces the noise at the switching nodes for low cross regulation (CR) in a single-inductor dual-output (SIDO) converter. In addition, two inherent LDO regulators in SMD technology fully regulate the dual outputs with the advantage of low quiescent current at no-load conditions. The experimental results show that the test chip fabricated under the 0.25-μm process has low CR of 0.015 mV/mA and ultralow quiescent current of 5 μA under no-load conditions.
- Cross regulation (CR)
- low-dropout (LDO) regulator
- single-inductor dual-output (SIDO) converter
- stacked mosfet structures