MCP1603T-250I/OS
数据手册.pdfMICROCHIP MCP1603T-250I/OS 同步降压开关稳压器, 固定, 2.7V-5.5V输入, 2.50V和0.5A输出, TSOT-5
The is a synchronous Buck Regulator ideally suited for applications powered from 1-cell Li-ion or 2-cell/3-cell NiMH/NiCd batteries. At heavy loads, the MCP1603 operates in the 2MHz fixed frequency pulse-width modulation PWM mode, which provides a low noise, low-output ripple, small-size solution. When the load is reduced to light levels, the MCP1603 automatically changes operation to a pulse frequency modulation PFM mode to minimize quiescent current draw from the battery. No intervention is necessary for a smooth transition from one mode to another. These two modes of operation allow the MCP1603 to achieve the highest efficiency over the entire operating current range.
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- Over 90% typical efficiency
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- Automatic PWM-to-PFM mode transition
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- Internally compensated
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- Undervoltage lockout UVLO
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- Overtemperature protection
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- 100% Duty cycle operation