The LTC3202 is a low noise, constant frequency charge pump DC/DC converter that uses fractional conversion to increase efficiency in white LED applications. The part can be used to produce a regulated voltage or current of up to 125mA from a 2.7V to 4.5V input. Low external parts count (two flying capacitors and two small bypass capacitors at VIN and VOUT) make the LTC3202 ideally suited for small, battery-powered applications. An internal 2-bit DAC allows LED current to be adjusted for LED brightness control. The LTC3202 also has thermal shutdown protection and can survive a continuous short-circuit from VOUT to GND. Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors. A low current shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1µA. The LTC3202 is available in the 10-pin MSOP and 3mm x 3mm DFN packages. Applications * White LED Backlighting * Programmable Boost Current Source * Low Noise Constant Frequency Operation * 25% Less Input Current Than Doubler Charge Pump * High Output Current: Up To 125mA * Small Application Circuit * Regulated Output Voltage or Current * Automatic Soft-Start * VIN Range: 2.7V to 4.5V * No Inductors * 1.5MHz Switching Frequency * ICC < 1µA in Shutdown * Available in 10-Pin MSOP and 3mm x 3mm DFN Packages https://elecena.pl/product/256603/low-noise-high-efficiency-charge-pump-for-white-leds 2007-03-03 https://elecena.pl/product/256603/low-noise-high-efficiency-charge-pump-for-white-leds 2014-04-03 https://elecena.pl/product/256603/low-noise-high-efficiency-charge-pump-for-white-leds 2025-01-19