Update: 30 September, 2023
The LM2753 is a high-power switched capacitor voltage converter/flash LED driver. It can drive a flash LED with a pulsed current of 400mA at an input voltage of 3.6V. The device uses a switched capacitor doubler and 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. The LM2753 uses Pulse Frequency Modulation (PFM) regulation. Typical operating frequency is 725kHz. Under no-load conditions, the 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.). The LM2753 is available in a 10-pin No Pullback Leadless Lead-frame Package: LLP-10.
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MD5 Checksum: 63535D8FF4CA2EF7A80636B38EF04719
Publication date: 04 May, 2012
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