亚瑟莱特科技推出AX3023系列Tiny Package PWM电源管理IC。AX3023系列为一颗脉波宽度调变输出1安培的异步直流降压转换器，输入电压范围可由最低4.5伏特到最高28伏特，输出电压可以依需要调整最低可以至0.75伏特，非常适合于数码相框，数字机顶盒，网络通信的CPE device等装置的电压转换方案。
AX3023系列应用上可提供高转换效能及稳定的工作电压，其内部具有短路保护(SCP),过电流保护(Current-limit Protection)及过温度保护(Thermal Shutdown Protection)功能，切换频率固定为200KHz。
AX3023采用标准的SOP-8L和小型的SOT23-5L无铅封装与极少的外部组件可大幅缩小印刷电路板的面积，具有散热片可以将热导至印刷电路板上，大幅降低组件表面温度以符合客户需求。
亚瑟莱特并积极协助原本使用PSM或PWM controller需外加晶体管或MOSFET的客户以此Simply的方案做为未来的电源新架构已达到最佳的C/P value。
AX3023-200KHz,1A PWM Buck DC/DC Converter  DataSheet
GENERAL DESCRIPTION
The AX3023 series are monolithic IC designed for a step-down DC/DC converter, and own the ability of driving a 1A load without additional transistor. It saves board space. The external shutdown function can be controlled by logic level and then come into standby mode. The internal compensation makes feedback control having good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. If the AX3023’s VFB is down below 0.5V, the switching frequency will be reduced. The AX3023 operates at a switching frequency of 200KHz thus allow smaller sized filter components. Other features include a guaranteed +3% tolerance on output voltage under specified input voltage and output load conditions, The chips are available in SOT23-5L and SOP-8L packages.
FEATURES
- Output voltage: adjustable output version.
- Adjustable version output voltage range: 0.745V to 22V±3%.
- Fixed switching frequency is 200KHz
- Thermal-shutdown and current-limit protection.
- ON/OFF shutdown control input.
- Short Circuit Protect (SCP).
- Operating voltage can be up to 24V.
- Output load current: 1A.
- SOT23-5L and SOP-8L packages.
- Low power standby mode.
- Built-in switching transistor on chip.
|