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LM2753,pdf,datasheet (High Pow

消耗积分:3 | 格式:rar | 大小:433 | 2009-09-08

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The LM2753 is capable of driving a Flash LED with a pulsed current of 400mA at an input voltage of 3.6V. A switched capacitor doubler, the LM2753 provides a regulated 5V output (VOUT) over an input supply range of 3.0V to 5.5V. The switched output, IOUT, takes less than 10ns to turn on and provide maximum current to a Flash LED. Flash LED current is set via a ballast resistor. Continuous illumination current (Torch Mode) is programmed by connecting a resistor between IOUT and VOUT. This device uses only three small, low-cost ceramic capacitors.

LM2753 uses Pulse Frequency Modulation (PFM) regulation. Typical operating frequency is 725kHz. Under no-load conditions, LM2753 operates on only 60µA. If the output is connected to ground, the charge pump stays in the gain of 1 which helps limit the input current to 300mA (typ.)

LM2753 is available in a 10-pin No Pullback Leadless Leadframe Package: LLP-10.

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