MCP1603T-250I/OS

MICROCHIP  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