Featuresn Wide 8V to 45V input voltage range.n Fixed 5V output voltage.n Maximum 1.8A output current.n Fixed 150KHz switching frequency.n Internal optimize power MOSFET.n High efficiency up to 92%.n Built in output short shutdown function.n Excellent line and load regulation.n Built in thermal shutdown function.n Built in current limit function.n Available in SOIC-8 package.Applicationsn Car Charger.n Battery Charger.n USB Power Supply.General DescriptionThe HM3501 is a 150 KHz fixed frequencyPWM buck (step-down) DC/DC converter,capable of driving a 1.8A load with highefficiency, low ripple and excellent line andload regulation. Requiring a minimumnumber of external components, the regulatoris simple to use and include internalfrequency compensation and afixed-frequency oscillator.The HM3501 built in output short protectionfunction. When short protection functionhappens, the chip will be shutdown. Aninternal compensation block is built in tominimize external component count.

HM3501是一款高效降压型DC-DC转换器，固定150KHz开关频率，可以提供最高1.8A输出电流能力，具有低纹波，出色的线性调整率与负载调整率特点。HM3501内置固定频率振荡器与频率补偿电路，简化了电路设计。HM3501内置输出短路保护功能。当输出短路时，芯片关机。内部补偿模块可以减少外围元器件数量。特点 8V到45V宽输入电压范围 固定5V输出电压 最大1.8A开关电流 固定150KHz开关频率 内置功率MOS 效率高达92% 内置输出短路保护功能 出色的线性与负载调整率 内置热关断功能 内置限流功能 SOP8封装应用 车载充电器 电池充电器 USB电源描述