MAX1796:低电源电流、升压型DC-DC转换器,可真正关断

低电源电流、升压型DC-DC转换器,具有True Shutdown™

The MAX1795/MAX1796/MAX1797 are high-efficiency, step-up DC-DC converters intended for small portable hand-held devices. These devices feature Maxim's True Shutdown™ circuitry, which fully disconnects the output from the input in shutdown, improves efficiency, and eliminates costly external components. All three devices also feature Maxim's proprietary LX-damping circuitry for reduced EMI in noise-sensitive applications. For additional in-system flexibility, a battery monitoring comparator (LBI/LBO) remains active even when the DC-DC converter is in shutdown. The input voltage range is +0.7V to VOUT, where VOUT can be set from +2V to +5.5V. Startup is guaranteed from +0.85V. The MAX1795/MAX1796/MAX1797 have a preset, pin-selectable 5V or 3.3V output. The output can also be adjusted to other voltages, using two external resistors. The three devices differ only in their current limits, allowing optimization of external components for different loads: the MAX1795, MAX1796, and MAX1797 have current limits of 0.25A, 0.5A, and 1A, respectively. All devices are packaged in a compact, 8-pin µMAX® package that is only 1.09mm tall and half the size of an 8-pin SO.

关键特性
  • > 95% Efficiency
  • True-Shutdown Circuitry
    • Output Disconnects from Input in Shutdown
    • No External Schottky Diode Needed
  • 25µA Quiescent Supply Current
  • Low-Noise Antiringing Feature
  • LBI/LBO Comparator Enabled in Shutdown
  • 2µA Shutdown Current
  • 8-Pin µMAX Package
MAX1795、MAX1796、MAX1797:典型工作电路
MAX1795、MAX1796、MAX1797:典型工作电路
应用
  • PDA与掌上电脑
  • 便携式数字音频播放器
  • 便携式终端
  • 无线手机
数据手册DataSheet
语言下载文件备注
英文MAX1795-MAX1797.pdfRev 0; 12/2000
关键参数
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeSynchronous SwitchingICC
(mA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsPackage/PinsBudgetary
Price
minmaxminmaxmaxtyptypSee Notes
MAX17950.75.525.5
  • 3.3
  • 5
0.18
  • Preset
  • Resistor
InternalYes0.02521µMAX/8$3.83 @1k
MAX179610.3µMAX/8$4.01 @1k
MAX179710.55µMAX/8$2.18 @1k
开发工具
技术资料
质量和环境数据
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订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1796EUA停止供货MAX1796EUA+µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
MAX1796EUA+生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX1796EUA+T生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX1796EUA-T停止供货MAX1796EUA+TµMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
MAX1795-MAX1797.pdf MAX1797
Boost Converter Switches Between Battery and USB Power MAX1792
High-Efficiency Step-Up Converter Robs Parallel Port MAX1796
MAX1796.pdf MAX1796