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MAX1652：高效率、PWM、降压型DC-DC控制器，16引脚QSOP封装

10A DSP/CPU核电源，提供二次侧输出，采用节省空间的QSOP封装

The MAX1652-MAX1655 are high-efficiency, pulse-width-modulated (PWM), step-down DC-DC controllers in small QSOP packages. The MAX1653/MAX1655 also come in 16-pin narrow SO packages that are pin-compatible upgrades to the popular MAX797. Improvements include higher duty-cycle operation for better dropout, lower quiescent supply currents for better light-load efficiency, and an output voltage down to 1V (MAX1655). The MAX1652-MAX1655 achieve up to 96% efficiency and deliver up to 10A using a unique Idle Mode™ synchronous-rectified PWM control scheme. These devices automatically switch between PWM operation at heavy loads and pulse-frequency-modulated (PFM) operation at light loads to optimize efficiency over the entire output current range. The MAX1653/MAX1655 also feature logic-controlled, forced PWM operation for noise-sensitive applications. All devices operate with a selectable 150kHz/300kHz switching frequency, which can also be synchronized to an external clock signal. Both external power switches are inexpensive N-channel MOSFETs, which provide low resistance while saving space and reducing cost. The MAX1652 and MAX1654 have an additional feedback pin that permits regulation of a low-cost second output tapped from a transformer winding. The MAX1652 provides an additional positive output. The MAX1654 provides an additional negative output. The MAX1652-MAX1655 have a 4.5V to 30V input voltage range. The MAX1652/MAX1653/MAX1654's output range is 2.5V to 5.5V while the MAX1655's output range extends down to 1V. An evaluation kit (MAX1653EVKit) is available to speed designs.

关键特性 96% Efficiency Small, 16-Pin QSOP Package (half the size of a 16-pin narrow SO) Pin-Compatible with MAX797 (MAX1653/MAX1655) Output Voltage Down to 1V (MAX1655) 4.5V to 30V Input Range 99% Duty Cycle for Lower Dropout 170µA Quiescent Supply Current 3µA Logic-Controlled Shutdown Dual, N-Channel, Synchronous-Rectified Control Fixed 150kHz/300kHz PWM Switching, or Synchronized from 190kHz to 340kHz Programmable Soft Start Low-Cost Secondary Outputs (MAX1652/MAX1654) Synchronous rectifier, secondary output regulation, high efficiency over full IOUT range

MAX1652、MAX1653、MAX1654、MAX1655功能框图 应用 蜂窝电话 分布式电源 手持式计算机 手持终端 移动通信 笔记本电脑 PDA

数据手册DataSheet

关键参数

开发工具

• MAX1653EVKIT

质量和环境数据

• MAX1652.pdf

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