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说明

MCP1665设备是一款紧凑、高效、固定频率、非同步升压DC-DC转换器，集成了一个36V、100 m的NMOS开关。它为三电池碱性电池、终极锂电池、镍镉电池、镍氢电池、单电池锂离子电池或锂聚合物电池供电的应用提供了一种节省空间的高压升压电源解决方案。集成开关受到典型的3.6A逐周期电感器峰值电流限制操作的保护。有一个输出过电压保护和开路负载保护，如果反馈电阻器意外断开、反馈引脚对GND短路或输出暴露在过高电压下，则会关闭开关。实现了用于节能的脉冲频率调制（PFM）开关模式，并且可以通过专用的mode引脚进行选择。

MCP1665易于使用，允许在小型印刷电路板（PCB）区域内创建经典的升压、SEPIC或反激式DC-DC转换器。所有补偿和保护电路都集成在一起，以最大限度地减少外部组件的数量。

特性

• 36V, 100 mΩ Integrated Switch
• Up to 92% Efficiency
• Higher Current Compared to the Previous MCP166x Switchers Family
• Output Voltage Range: Up to 32V
• IOUT > 1 A at 5.0V VIN, 12V VOUT
• IOUT > 700 mA at 3.3V VIN, 12V VOUT
• IOUT > 400 mA at 4.2V VIN, 24V VOUT
• Input Voltage Range: 2.9V to 5V
• UVLO at VIN Rising: 2.9V, typical
• UVLO at VIN Falling: 2.7V, typical
• No Load Input Current: 250 μA Typically for PFM, 500 μA Typically for PWM
• Shutdown Mode with 0.4 μA Typical Quiescent Current
• Automatically PFM/PWM or Selected by the MODE Pin, for High Efficiency
• 500 kHz PWM Operation with Skipping Mode Operation Selectable by Dedicated MODE Pin
• Feedback Voltage Reference: VFB = 1.2V
• Cycle-by-Cycle Current Limiting
• Internal Compensation
• Inrush Current Limiting and Internal Soft Start
• Output Overvoltage Protection (OVP) and Open-Load Protection (OLP) for Constant Current Configuration
• Thermal Shutdown
• Easily Configurable for SEPIC, Cuk or Flyback Topologies
• Available Package: 10-Lead 2x2 mm VQFN

参数