| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 99 === This thesis aims to design a switching boost regulator IC with 1-V start-up feature. It can boost the input voltage from single NiMH battery (around 1.2 V) to 2 ~ 6 V. With a 15-贡A ultra low quiescent current at no load, the battery lifetime can be extended. Depending on the load level, the pulse width modulation (PWM) and pulse frequency modulation (PFM) schemes can be automatically switched to ensure high conversion efficiencies at light and heavy loads. Thus the proposed boost regulator IC is suitable for portable electronic device applications.
The presented switching boost regulator IC contains a bandgap reference voltage source, a schmitt trigger, over temperature/over current protections, comparators, a clock generator, a slope compensation circuit, a driver circuit and digital control logic circuits. This chip is implemented by CSMC’s 0.5-贡m/5-V CMOS process. The chip area is 0.6×0.8mm2 and the operating voltage lies in the range of 2 to 6 V. The minimum start-up voltage is 0.95 V. The load regulation and line regulation are respectively 1.3283 mV/mA and 0.5 mV/V. Other measurements are also included.
|
|---|
