MAX1522:简单的SOT23封装boost控制器

The MAX1522/MAX1523/MAX1524 are simple, compact boost controllers designed for a wide range of DC-DC conversion topologies, including step-up, SEPIC, and flyback applications. They are for applications where extremely low cost and small size are top priorities. These devices are designed specifically to provide a simple application circuit and minimize the size and number of external components, making them ideal for PDAs, digital cameras, and other low-cost consumer electronics applications. These devices use a unique fixed on-time, minimum off-time architecture, which provides excellent efficiency over a wide-range of input/output voltage combinations and load currents. The fixed on-time is pin selectable to either 0.5µs (50% max duty cycle) or 3µs (85% max duty cycle), permitting optimization of external component size and ease of design for a wide range of output voltages. The MAX1522/MAX1523 operate from a +2.5V to +5.5V input voltage range and are capable of generating a wide range of outputs. The MAX1524 is intended for bootstrapped operation, permitting startup with lower input voltage. All devices have internal soft-start and short-circuit protection to prevent excessive switching current during startup and under output fault conditions. The MAX1522/MAX1524 have a latched fault mode, which shuts down the controller when a short-circuit event occurs, whereas the MAX1523 reenters soft-start mode during output fault conditions. The MAX1522/MAX1523/MAX1524 are available in a space-saving 6-pin SOT23 package.

关键特性
  • Simple, Flexible Application Circuit
  • 2-Cell NiMH or Alkaline Operation (MAX1524)
  • Low Quiescent Current (25µA typ)
  • Output Fault Protection and Soft-Start
  • High Efficiency Over 1000:1 IOUT Range
  • Pin-Selectable Maximum Duty Factor
  • Micropower Shutdown Mode
  • Small 6-Pin SOT23 Package
  • No Current-Sense Resistor
MAX1522、MAX1523、MAX1524:典型工作电路
MAX1522、MAX1523、MAX1524:典型工作电路
应用
  • 工业+24V和+28V供电电源
  • LCD偏置电源
  • 低成本电池供电应用
  • 低成本、大电流或高电压升压转换器
  • 低成本、多输出反激式转换器
  • SEPIC转换器
数据手册DataSheet
语言下载文件备注
英文MAX1522-MAX1524.pdfRev 1; 08/2010
关键参数
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxmaxtyptypmaxSee Notes
MAX15222.55.52.510010ResistorExternal0.0250.001111000SOT/6$1.07 @1k
MAX15232.51000.95SOT/6$1.61 @1k
MAX15241.5510SOT/6$1.07 @1k
开发工具
技术资料
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1522EUT+生产中SOT,;6引脚;9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1522EUT+T生产中SOT,;6引脚;9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1522EUT-T停止供货MAX1522EUT+TSOT,;6引脚;9mm²-40°C至+85°CRoHS/无铅:否
MAX1522-MAX1524.pdf MAX1524
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典型工作电路 MAX1524