数据手册MAX798 在较宽的负载范围内保持高效 .pdf [英文Rev.0(PDF,108kB)]

{状况:生产中。}

The MAX798 high-performance, step-down DC-DC converter provides main CPU power in battery-powered systems. This buck controller achieves 96% efficiency by using synchronous rectification and Maxim's proprietary Idle Mode™ control scheme to extend battery life at full-load (up to 10A) and no-load outputs. The MAX798's high accuracy meets the demanding requirements of the latest-generation CPUs. Excellent dynamic response corrects output transients caused by the latest dynamic-clock CPUs within five 300kHz clock cycles. Unique bootstrap circuitry drives inexpensive N-channel MOSFETs, reducing system cost and eliminating the crowbar switching currents found in some PMOS/NMOS switch designs. The MAX798 has a logic-controlled and synchronizable fixed-frequency pulse-width-modulating (PWM) operating mode, which reduces noise and RF interference in sensitive mobile-communications and pen-entry applications. The SKIP override input allows automatic switchover to idle-mode operation (for high-efficiency pulse skipping) at light loads, or forces fixed-frequency mode for lowest noise at all loads.

产品关键特性
  • 96% Efficiency
  • 4.5V to 30V Input Range
  • 1.6V to 6V Adjustable Precision Output
  • ±0.4% Max Total Load-Regulation Error
  • 0.06%/V Max Line-Regulation Error
  • 5V Linear-Regulator Output
  • Precision 2.505V Reference Output
  • Automatic Bootstrap Circuit
  • 150kHz/300kHz Fixed-Frequency PWM Operation
  • Programmable Soft-Start
  • 1.2mA Typical Quiescent Current (VIN = 12V, VOUT = 2.5V)
  • 1µA Typical Shutdown Current
应用与使用范围
  • 笔记本电脑和亚笔记本电脑
  • PDA与移动通信
典型工作电路

芯片订购型号
订购型号产品状态封装形式工作温度RoHS/无铅
MAX798ESE生产中SOIC(N);16引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX798ESE+生产中SOIC(N);16引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX798ESE+T生产中SOIC(N);16引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX798ESE-T生产中SOIC(N);16引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
功能接近器件
MAX1652高效率、PWM、降压型DC-DC控制器,16引脚QSOP封装
MAX1653高效率、PWM、降压型DC-DC控制器,16引脚QSOP封装
MAX1654高效率、PWM、降压型DC-DC控制器,16引脚QSOP封装
MAX798.pdf MAX798
典型工作电路 MAX798