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A Hybrid Single-Inductor Bipolar-Output DCDC Converter With Floating Negative Ou
一种用于AMOLED显示器的混合单电感双极输出DC-DC转换器，具有浮动负输出配置和低纹波特性。
1MHz工作频率，正输出纹波<1mV，3mV下冲电压，峰值效率89.3%（1.1W输出功率），最大输出功率3.5W
单电感双极输出DC-DC转换器AMOLED显示器浮动负输出低纹波
▸采用浮动负输出配置将所有开关纹波迁移至负输出，实现正输出接近零电压纹波
▸设计低功耗分流稳压器，仅处理小部分输出纹波，进一步调节正输出电压并改善负载瞬态响应
▸采用混合拓扑和基于交叉耦合自举的电平移位器，仅使用标准CMOS器件，无需深n阱，减少芯片面积和成本
Abstract
This article presents a hybrid single-inductor
bipolar-output (SIBO) dc–dc converter for active-matrix organic
light-emitting diode (AMOLED) displays, which are relatively
more sensitive to the supply noise on the positive supply. First,
to improve the display quality we adopt a floating negative
output configuration to migrate all the switching ripples into
the negative output, achieving a near-zero voltage ripple on the
positive output. Second, we design low-power shunt regulators,
which only de