MAX749是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX749是数字调节LCD偏置电源，本站介绍了MAX749的封装应用图解、特点和优点、功能等，并给出了与MAX749相关的Maxim元器件型号供参考。
MAX749 - 数字调节LCD偏置电源 - DC-DC开关调节器 - 可提供> -100V的驱动 - 美信半导体
The MAX749 generates negative LCD-bias contrast voltages from 2V to 6V inputs. Full-scale output voltage can be scaled to -100V or greater, and is digitally adjustable in 64 equal steps by an internal digital-to-analog converter (DAC). Only seven small surface-mount components are required to build a complete supply. The output voltage can also be adjusted using a PWM signal or a potentiometer.
A unique current-limited control scheme reduces supply current and maximizes efficiency, while a high switching frequency (up to 500kHz) minimizes the size of external components. Quiescent current is only 60µA max and is reduced to under 15µA in shutdown mode. While shut down, the MAX749 retains the voltage set point, simplifying software control. The MAX749 drives either an external P-channel MOSFET or a PNP transistor.
