MAX1654: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
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
语言下载文件备注
英文MAX1652-MAX1655.pdfRev 1; 07/1998
关键参数
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxmaxSee Notes
MAX16524.5302.55.5
  • 3.3
  • 5
  • Preset
  • Resistor
10ExternalYes2340QSOP/16$3.51 @1k
MAX16532.51
  • QSOP/16
  • SOIC(N)/16
MAX16542.52QSOP/16
MAX165511
  • QSOP/16
  • SOIC(N)/16
开发工具
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1654EEE停止供货MAX1654EEE+QSOP,;16引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX1654EEE+生产中QSOP,;16引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1654EEE+T生产中QSOP,;16引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1654EEE-T停止供货MAX1654EEE+TQSOP;16引脚-40°C至+85°C参考数据资料
MAX1652-MAX1655.pdf MAX1655
功能框图 MAX1655