A 900mA 93% efficient 50µA quiescent current fixed frequency hysteretic buck converter using a highly digital hybrid voltage- and current-mode control

Q. Khan, A. Elshazly, Sachin Rao, Rajesh Inti, P. Hanumolu
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引用次数: 19

Abstract

A hysteretic buck converter employs a hybrid voltage/current mode control to regulate output voltage and switching frequency independently. Fabricated in a 130nm CMOS process, the prototype consumes only 50μA quiescent current and operates at a constant switching frequency of 1MHz over a wide range of output voltages (0.7-to-1.8V) and inductor values (1-to-5μH) with a peak efficiency of 93%. The output ripple and the settling time of the converter are less than ±2.5mV and 10μs, respectively.
900mA 93%高效50µA静态电流固定频率滞回降压转换器,采用高数字混合电压和电流模式控制
迟滞降压变换器采用电压/电流混合模式控制,独立调节输出电压和开关频率。该原型机采用130nm CMOS工艺制造,在输出电压(0.7 ~ 1.8 v)和电感值(1 ~ 5μ h)范围内,仅消耗50μA静态电流,工作在1MHz恒定开关频率下,峰值效率为93%。变换器的输出纹波小于±2.5mV,稳定时间小于10μs。
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