The XD9242/XD9243 series is a group of synchronous-rectification step-down DC/DC converters with a built-in 0.11Ω(TYP.) P-channel MOS driver transistor and 0.12Ω(TYP.) N-channel MOS switching transistor, designed to allow the use of ceramic capacitors.
The small on-resistances of these two internal driver transistors enable a high efficiency, stable power supply with an output current up to 2A. The XD9242/XD9243 series has operating voltage range of 2.7V~6.0V and a 0.8V (±2.0%) reference voltage, and using externally connected resistors, the output voltage can be set freely from 0.9V. With an internal switching frequency of 1.2MHz or 2.4MHz, small external components can be used.
The series have a high speed soft-start as fast as 1ms in typical for quick turn-on. It’s suitable for large-current application due to limit current is configured 4.0A in typical. During stand-by, all circuits are shutdown to reduce current consumption to as low as 1.0μA or less. The integrated CL discharge function which enables the electric charge at the output capacitor CL to be discharged via the internal discharge switch located between the LX and VSS pins. Due to CL discharge function, malfunction on LX is prevented when Stand-by mode.
输入电压范围 2.7V～6.0V 输出电压范围 0.9V～VIN FB 电压 0.8V±2.0% 高转换效率 95%(TYP.) 输出电流 2.0A 工作频率
最大占空比 100% 功能 软启动
输出电容 陶瓷电容 控制方式 PWM/PFM自动切换控制 工作温度范围 -40℃～+85℃ 适应环保要求 与EU RoHS规格对应、无铅