An Improved Fast-Transient-Response Low-Transient-Voltage Boost Converter With Pseudo-Current Hysteresis-Controlled Techniques

This paper proposes a new and improved fast-transient-response low-transient-voltage boost converter with pseudo-current hysteresis-controlled techniques (PCHC). The converter uses the rail-to-rail current-sensing circuit to provide a hysteresis-controlled signal, helping to speed up the transient response and improve the overall efficiency. The proposed boost converter has been fabricated with TSMC <inline-formula> <tex-math notation="LaTeX">$0.18~\mu \text{m}$ </tex-math></inline-formula> CMOS 1P6M technology, and the chip area is <inline-formula> <tex-math notation="LaTeX">$1.18\times 1.18$ </tex-math></inline-formula> mm² (include PADs). The measured results show that the input voltage range is from 0.5 V to 1 V, the output voltage is set as 1.8 V, and the output load current range is from 10 mA to 100 mA. When the output load current changes from 10 mA to 100mA and 100 mA to 10 mA, the transient responses are both 2 <inline-formula> <tex-math notation="LaTeX">$\mu \text{s}$ </tex-math></inline-formula>, and peak power efficiency is 88.5% at the output load current of 75 mA.