电荷泵倍增器与线性稳压器 Charge Pump Doubler with Linear Regulator
Key Features: Wide Input Voltage: 1.8V to 4.4V 3.3V and Adjustable 2.5V to 5.5V Output Voltage Options Inductor-less design using small ceramic capacitors Low Shutdown Current of 1mA Internal Thermal Shutdown and Current Limiting 550kHz Switching Operation Description: The LX1882 is a two-stage boost regulator featuring a charge pump doubler with an integrated low dropout linear regulator. This configuration allows for a low noise boosted output for powering noise sensitive applications.The first stage features an internal doubler charge pump converting an input supply of 1.8V to 4.4V, while the second stage is an LDO regulating the boosted voltage converting it to a low noise output.The LX1882 is capable of supplying up to 50mA of output current with an operating current of less than 150mA. Quiescent current is reduced to < 5mA in shutdown mode.The LX1882’s internal regulator is stable with either Tantalum or Ceramic low-value capacitors, typically 2.2mF on the output, allowing designers flexibility in external component selection.Reliability and safety features include Thermal Shutdown Protection and Integrated Short-Circuit Protection.